1 bfANuFAcTu?lE JAM]ARY 1965 REPEATING COILS DISCONTINUED --- I (File as Card 1 on Repeating Coils) The manufacture of the following repeating coils has been discontinued and it is not considered necessary to maintain complete information in the catalogue. For information on codes not listed below, see other cards on repeating coils.
Code Replaced by Code Replaced by Zode Replaced by Code Replaced by 1 11D 25 Type 20D 25H 25T 2 12A 20E cc, 255 25H 3 12B 20F 25K 25P 4 12c 21A 25L 25R 5 30 12D 21B 25M 6 13A 21c 25N p; 7 13B 22 25P 8A' 25A, 26A or 27A 13c 23A 25R (b) 8B 14 24A 34A 25s (4 8C 15 25A 125A 25T (4 9 16 13B 25B 25F 25W 26L 1OA 17A 25C 25Y 37c 10B 18A 25D 256 25AA 1lA 19A 25E 25AB 11B 20B 25F 25s 25AC 11c 25 Type 2oc 25G 25AD 25s (a) Replaced by two 94F Repeating Coils plus one 112A Adapter and two 11A Resistance Lstmps. (b) Replaced by two 94F Repeating Coils plus one 112A Adapter. (c) 189E reccwnended. (d) Replaced by two 94E Repeating Coils plus one 112A Adapter and two 11A Resistance Lamps. (e) Replaced by two 94E Repeating Coils plus one 112A Adapter and four 11A Resistance Lamps. (f) Replaced by one 94E Repeating Coils plus one 94G Repeating Coil and one 112A Adapter. JANUARY 1965 / REPEATING COILS (File as Card 2 on Repeating Coils)
Code Replaced by Code Replaced bl Code Replaced by Code Replaced by
26A 126A 27E 47A 37E 47A 77A 26B 26E 27F (f) 37F 47B 26C 27G cd 37G 47c 26D 26F 284 38A 38B 47D 77D 26E 26H 29A 38B 46A 48A 78A 26F 30A cu 39A 46A 54A 26G 265 31A 25B 39B 55A 75A 26H 32A 26B 40A 55B 75B 265 ::; 33A 27B 40B 55c 75c 26L 34A 41A 55D 75D 26P ::; 35 42A 54B 55E 75E 26R 36 42B 54B 56B 27A id) 37A 46A 43A 56C 27B 27C 37B 44A 6) 56D 27C 27D 37c 45A 57A 27D (4 37D 46A 76A 58A 74A (a) Replaced by one 94E Repeating Coil plus one 112B Adapter and one 11A Resistance Lamp. (b) Replaced by one 94E Repeating Coil plus one 112B Adapter and two 11A Resistance Lamps. (c) Replaced by one 94F Repeating Coil plus one 112B Adapter. (d) Replaced by one 94E Repeating Coil plus one 113A Adapter. (e) Replaced by one 94E Repeating Coil plus one 113A Adapter and one 11A Resistance Lamp. (f) Replaced where used at a 1 to 4 ratio by one 94F Repeating Coil plus one 113A Adapter and where used at 25 to 1 ratio by one 189D Repeating Coil plus one 115A Adapter. (g) Replaced by one 94F Repeating Coil plus one 113A Adapter and one 11A Resistance Lamp. (h) Replaced by one 344F Transformer plus one 1lOA Adapter. (i) One 94E Repeating Coil plus one 113A Adapter reccsamended. JANUARY 1965 REPEATING COILS (File as Card 3 on Repeating Coils) I
Code Replaced by Code Replaced by Code Replaced by Code Replaced by 5BB 64G 69D 8OA 5gD Code Replaced by Code Replaced by Code Replaced by Code Replaced by 86D 94c 94E 105B 120DS 120D 86B 94D 94F 107B 120ES 120E 86F 94G (4 108B 120F 120FS 12OF 95A 95c 108E 120GS 120G 87A 95B 95D 109B 120HS 12OH a8A 95c 95E 109c 120.s 1205 89A 95D 95F 112A 120KS 120K a9B 95E Two 94E 115D 6 12OLS 1202 9oA 90B 95F Two 94F 116A 122A 9OB 96A 117A 124A 92A (a) Replaced by one 94F Repeating Coil plus one 114A Adapter and one 1lA Resistance Lamp. (b) Replaced by one 94F Repeating Coil plus one 114A Adapter. (c) 145B Output,Transformer recommended. (d) Replaced by one 189D Repeating Coil plus one 11SA Adapter. (a) Replaced by a 94N Repeating Coil. However, when the 94N must be mounted interchangeably with the lOlA, two 26B Brackets must be ordered. (f) 115B recc8lended. (g) Replaced by two 94E Repeating Coils plus one 112.A Adapter. (h) Replaced by one 94F Repeating Coil plus one 112B Adapter. (i) 146U recosruended. MANUFACTURE JANUARY 1965 1 REPEATING COILS DISCONTINUED (File as Card 5 on Repeating Coils) I Code Replaced by Code Replaced by Code Replaced by Code Replaced by 135B - 148B (b) 172A 187A 135c 149A 173A 173E 196B 136A 153A cc, 173AS 173ES 196C 138A 154c 173BS 173B 196D - 14lA 156A 173cs 173c 196E 143A 158A 173DS 173D 196F 144A 161A 189A 173ES 173E 197A 197B 145A 161B 178A 178B 209A 147A 163A 184A 212B - 148A (a) 171A -7 186A 216A - (a) Replaced by the 2521A Transformer. (b) Replaced by the 2521B Transformer. (c) 166A reccannended. DECEMBER 1971 SEE RATINGS NE-20 TYPE REPEATING COILS BELOW Intended for use in busy test circuits of "B" operators' anti-side tone telephone set. Rated Resistance Code Windings (Oha-) Rating NE-ZOG Primary (l-2) 277 Standard c Secondary (3-4) 40 1 Primary (l-2) 215 NE-20H Secondary (3-4) and 29 II (Parallel wound) (4-5) each GENERAL DESIGN 13 DIMENSIONS OF NE-20G 8 H : 5 : NE-20H NE-20G OCTOBER 1970 NE-49A REPEATING COIL STANDARD Intended for use in the graduated howler circuit of the NE-12 local test desk and trouble positions of local switchboards. Has two windings, primary and secondary. Primary winding - approximate resistance 1.65 ohms. Secondary winding - approximate resistance 31 ohms, taps being brought out dividing the winding into sections as shown in the diagram and of the resistance shown in the table. Impedance ratio of primary to secondary 1 to 15. Number Approximate Winding of Turns Resistance (ohms) AB 3 .05 BC 2 .04 CD 10 125 DE 15 :1a3 EF 40 .44 FG 50 .53 GH 130 1.43 HJ 350 4.07 JK 600 8.04 KL 1000 16.06 AL 2200 31.00 SEE RATINGS JANUARY 1965 Nos. 56A 86 B REPEATING COILS BELOW Toroidal type coils each enclosed in a crosstalk- proof shell and mounted on a wooden base. Have three windings, two inner windings (l-2) ; and (3-4) and one outer winding (5-8). Two taps are brought out from the outer winding at terminal 6 and ‘7. Designed for use with a No. 84 type interrupter for supplying alternating current. When so used they produce A.C. voltages as follows: Be- tween terminals 5 and 6, approximately 60 volts for use in ringer adjusting circuits; between terminals 5 and 7, approximately 95 volts for use with superimposed ringing, and between terminals 5 and 8, approximately 100 volts for A.C. ringing. Approximate D.C. Resistance Code -.____ of Windings (Ohms) No. (l-2) (3-4) (6-6) (5-7) (6-8) Rating (*)56A .96 .95 12 19.8 22.6 Standard (:\56B 2.4 2.l 16.7 26.8 27.8 NOT MANUFACTURED (*) For use with a No. 84F interrupter. (24 volt battery.) I6 (f) For use with a No, 84G interrupter. (38 volt battery.) OCTOBER 1970 NE-58C REPEATING COIL STANDARD . Toroidal type coil enclosed in a crosstalk-proof case arranged to mount on mounting plates. Intended for use in the carrier telegraph repeater panel. Has four windings. Resistance of each winding (1-2) and (5-6) is approximately 130 ohms and of each winding (3-4) and (7-8) is approximately 18 ohms. Impedance ratio of 30,000 to 2,000 between windings (l-2) (5-6) and (3-4) (7-8). OCTOBER 1970 NE-6OA REPEATING COIL STANDAM Open-core type repeating coil mounted on a wooden base. Has two windings, primary and secondary. Primary winding - resistance 255 ohms. Secondary winding - resistance 1.5 ohms. Intended for use in producing dial tone in connection with the interrupter rings in step-by-step dial offices. SEE RATINGS NOVEMBER 1969 NE-62 TYPE REPEATING COILS BELOW I I Two toroidal type coils, each enclosed in a metal case and assembled on a common metal base. Intended for toll circuits; suitable for 135 and 1000 hertz signalling, but not for 20 hertz signalling. L-L---- 1, Impedances of each pair of coils are matched to WINDING FOR EACH COIL permit use with 22 type telephone repeaters. Arrangement and balance of line windings (4-3) (8-7) makes them suitable for use in deriving phantom circuits. (NE-62G excepted.) Electrically equivalent to NE-85 type. Mounting screws are furnished. Approx Resistance Impedance Ratio of Windings (4-3) (8-7) to NE-62A. ALSO GENERAL DESIGN Code (l-2) (3-4) (5-6) (7-8) (2-l) (6-5) Rating AND DIMENSIONS.OF NE-62 TYPE 23 22 23 1 to 1 Standard NE-62BNE-62A 2122 14 21 14 1 to 1.62 II NE-62C 13 22 13 22 1.62 to 1 (1 NE-62E 9 23 9 23 2.66 to 1 11 NE-62F 22 20 22 20 1 to 1.276 I, NE-62G 20.5 9 20.5 9 1 to 2.34 81 OCTOBER 1970 NE-66A REPEATING COI L A repeating coil having a laminated iron core the same as that of an NE-H type relay. Intended for use in machine switching equipments. Arranged to mount interchangeably with NE-40 type resistors NE-E and NE-H type relays on mounting plates and is provided with mounting screws. Will mount on 1.750 inch vertical centres and .750 inch horizontal centres. Has two inductive windings. Inner winding-resistance, 25 ohms plus or minus 5%. Outer winding-resistance, 500 ohms plus or minus 5%. SEE RATINGS APRIL 1971 NE-67 TYPE REPEATING COILS BELOW Each consists of a winding on a silicon steel core potted in a metal case. Have impedance ratios of 1 to 1 between windings (l-2) (5-6) and (3-4) (7-8). Windings (l-2) and (5-6) have an approximate dc resistance of 20 ohms each and (3-4) and (7-8) of 21 ohms each. Closest recommended mounting centres are 2.625 inches by 4.250 inches. NE-67C: lntended fur use in metallic telegraph repeaters. NE-67E: Same as &E--b/C except its phantom to side crosstalk is limited so that the coil is suitable for use in deriving phantom circuits. Intended for general use as a ring-through phantom repeating coil in railway telephone systems. Code Rating / 4 219 NE-67C Standard NE-67E ,I FEBRUARY 1971 SEE RATINGS NE-67 TYPE REPEATING COILS BELOW Each consists of a winding on a silicon steel core potted in a metal case. Have impedance ratios of 1 to 1 between windings (l-2) (5-6) and (3-4) (7-8). Each has an approximate dc resistance of 20 ohms across windings (1-2) (5-6) and 21 ohms across windings (3-4) (7-8). Closest recommended mounting centres are 2.625 inches by 4.250 inches. NE-67C: Intended for use in metallic telegraph repeaters. NE-67E: Same as NE-67C except its phantom to side crosstalk is limited so that the coil is suitable for use in deriving phantom circuits. Intended for general use as a ring-through phantom repeating coil in railw;? telephone systems. Code Rating NE-67C Standard NE-67E II SEE RATINGS OCTOBER 1970 NE-74 TYPE REPEATING COILS BELOW Toroidal type coils enclosed in crosstalk-proof cases. Arranged to mount on mounting plates. Have four inductive windings. Approx Resistance Impedance Ratio of Windings (ohms) Windings (1-2) & (S-6) to Code (1-Z) (3-4) (5-6) (7-8) (3-4) & (7-8) Rating NE-74A 23.5 1 to 1 Standard (a)NE-74A 22 23.5 22 II (b)NE-74C 2 2 2 2 600 to 600 (a) Equivalent to one half of an NE-75A. Same as NE-58A, except that the capacity between the windings is symmetrically distributed. (b) Has an electrostatic shield between windings (l-2) (5-6) and (3-4) (7-8). NE-74C NE-74A ALSO GENERAL DESIGN AND DIMENSIONS OF NE-74 TYPE OCTOBER 1970 SEE RATINGS NE-75 TYPE REPEATING COILS BELOW c ” Toroidal type phantom terminating l l repeating coils enclosed in crosstalk- LI proof shells and mounted on wooden bases. h Each coil has four inductive windings. I) . The two units mounted on a common base II are paired for use with repeaters. Impedance Ratio Approximate Resistance of Windings (4-3) and (8-7) to Code (l-2) (3-4) (5-b) (7-8) (Z-1) and (6-5) Rating NE-75A 22 23 22 23 1 to 1 Standard NE-75B 21 14 21 14 1 to 1.62 11 NE-75F 21 44 21 44 1.62 to 1 ,1 NE-75G 19 64 19 64 2.66 to 1 11 OCTOBER 1970 NE-76A REPEATING COIL STANDARD .. II Two toroidal type phantom terminating 1 repeating coils, each enclosed in a crosstalk- u proof shell and mounted on a wooden base. r. I) Approximate resistance of windings (1-Z) t and (5-6) is 20 ohms each and windings (3-4) N and (7-8) is 21 ohms each. 1 k- --~ ~---- lo; -~~~~~~~~.---- 4 Impedance ratio 1 to 1. r--3;---1 OCTOBER 1970 NE-77A REPEATING COIL STANDARD T Toroidal type phantom terminating repeating coil enclosed I in a crosstalk-proof shell and mounted on a wooden base. I / Has four inductive windings. 3 I Approximate resistance of windings (l-2) and (5-6) is / 20 ohms each and of windings (3-4) and (7-8) is 21 ohms each. L 9’ Impedance ratio 1 to 1. Equivalent to one-half of NE-76A. OCTOBER 1970 NE-78A REPEATING COIL STANDARD A toroidal type phantom circuit repeating Coil enclosed in a crosstalk- proof shell, and two resistance units enclosed in a crosstalk-proof shell; mounted on a wooden base. The repeating coil is equivalent to one-half of an NE-76A. Has four windings. Approximate resistance of each winding: 21 ohms. Impedance ratio: 1 to 1. Each resistance unit is non- inductively wound, and is adjusted to have approximately the same dc resistance as the repeating coil phantom line winding having the same terminal designations. Intended for use at intermediate stations on phantom lines where one side of the phantom circuit is terminated; the phantom circuit and the other side circuit going through. OCTOBER 1970 NE-83B REPEATING COIL STANDARD Toroidal type coils enclosed in a crosstalk-proof case. Has four inductive windings. Approximate resistance of windings (l-2) and (5-6) is 22 ohms and of windings (3-4) and (7-8) 23 ohms. a j6i ‘ t Impedance ratio of windings (l-2) and (5-6) to (3-4) and (7-8) f is 1 to 1. Equivalent to one-half of an NE-62A. OCTOBER 1970 NE-84B REPEATING COIL STANDARD Toroidal type coil enclosed in a metal case. Have an impedance ratio of 1 to 1 between windings (3-4) (7-8) and (l-2) (5-6). Operating frequency is 135 hertz. Closest recommended mounting centres are 2.625 inches by 4.250 inches. Approximate dc resistance of windings (l-2) (5-6) connected in series aiding is 11.4 ohms and of windings (3-4) (7-8) connected in series aiding is 16.1 ohms. Intended for use in the NE-156B interrupter. SEE RATINGS OCTOBER 1970 NE-85 TYPE REPEATING COILS BELOW Toroidal type phantom terminating repeating coils enclosed in metal cases and mounted on wooden bases. Each coil has four inductive windings. Same as the NE-75 type coils, except that an air gap is formed in the core by Rnission of the separator. Impedance Ratio Approx Resistance of Windings (ohms) (4-3) and (8-7) to Code (l-2) (3-4) (5-b) (7-B) (2-l) and (6-5) Rating NE-85A 22 23 22 23 1 to 1 Standard NE-85B 21 14 21 14 1 to 1.62 " OCTOBER 1970 NE-9IA REPEATING COIL STANDARD Two toroidal type coils, each enclosed in a metal case and assembled on a common metal base. Intended for use at non-repeatered points in toll circuits; suitable for 20 hertz, 135 hertz and 1000 hertz signalling. f Arrangement and balance of line windings (4-3) (8-7) makes them suitable for use in deriving phantom circuits. Approximate resistance of windings (l-2) (5-6) is 20 ohms each and of windings (3-4) (7-8) is 21 ohms each. Impedance ratio of windings (2-l) (6-5) to (4-3) (8-7) is 1 to 1. Electrically equivalent to NE-76A. OCTOBER 1970 NE-93 TYPE REPEATING COILS SEE RATINGS BELOW F Two toroidal type coils, each enclosed in a metal case and assembled on a common metal base. n Intended for toll circuits; suitable for 20 hertz, 135 hertz and 1000 hertz signalling. Impedances of each pair of coils are matched to permit use t with NE-22 type telephone repeaters. Arrangement and balance of line windings (4-3) (8-7) makes N WlNDlNG FOR EACH COIL them suitable for use in deriving phantom circuits. Electrically equivalent to NE-75 type. Approximate Resistance Impedance Ratio of Windines (ohms) (4-3) (8-7) to Code (l-2) (3-4) (5-b) (T-8) (Z-1) (6-5) Rating NE-93A 22 23 22 23 1 to 1 Standard NE-93B 21 14 21 14 1 to 1.62 I, NE-93F 21 44 21 44 1.62 to 1 II NE-93G 19 64 19 64 2.66 to 1 II NE-93H 22.5 39.5 22.5 39.5 1.24 to 1 II NE-933 17 55 17 55 2.28 to 1 II AND DIMENSIONS OF NE-93 TYPE OCTOBER 1970 NE-97A REPEATING COIL STANDARD Intended for use in step-by-step machine switching systems, Has two inductive windings, Approximate dc resistance, inner winding (l-Z), 23 ohms. I-/f Approximate dc resistance, outer winding (3-4), 13 ohms. I SEE RATINGS OCTOBER 1970 NE-98 TYPE REPEATING COILS BELOW Lutended for use in step-by-step systems. Have two inductive windings. _- 5 Furnished with mounting screws and washers. i ,I"; Impedance -i- , Approx Resistance Ratio Length of 1,; : of Windings (ohms) Windings >1tg Screws 1 13C Code (l-2) (3-4) (l-2) to (3-4) (Inches) Rating L ~- i -&-98A 42 1 to 80 .625 Standard .55 8, NE-98B 13 13 1 to 1.28 .750 SEE RATINGS OCTOBER 1970 NE-100 TYPE REPEATING COILS BELOW Toroidal type coils enclosed in metal cases arranged to mount on rack type mounting plates. Will mount on 2.125 inch horizontal centres and 4.00 inch vertical centres. Approx Resistance Impedance Ratio of Windings (3-4) and (7-8) Inductive Non-Ind Code (l-2) (3-4) (5-6) (7-8) 1-1R 6-6R (l-2) ::d (5-6) Rating NE-100A 22 23 22 23 40 40 1 to 1 Standard NE-100B 21 28.5 21 28.5 40 40 1.62 to 1 3, OCTOBER 1970 SEE KATINGS NE-102 TYPE REPEATING COILS BELOW ToruidaL type coils enclosed in metal cases arranged to mount on rack type mounting plates. Will mount on 2.125 inch horizontal centres and 4.00 inch vertical centres. lmuedance Ratio Approx Kesistdnce (3-4) and (7-8) of Windinms n Code (5-6) (I-1) and (5-6) Kating (l-2)- (3-4) (7-B) NE-102.A 22 23 22 23 1 to 1 Standard NE-102B 13 12.5 13 22.5 1.62 to 1 I, OCTOBER 1970 NE-103 B REPEATING COIL STANDARD Straight core type coils enclosed in a metal case. Similar in construction to NE-H type relays. Arranged to mount interchangeably with NE-H type relays. Will mount on 1.750 inch vertical centres and 1.250 inch horizontal centres. Resistance values do not vary more than plus or minus 5%. Has two windings a primary and secondary. Primary winding - rated resistance 25 ohms. Secondary winding - rated resistance 500 ohms. OCTOBER 1970 NE-IOGA REPEATING COIL STANDARD Shell type coil enclosed in a sheet metal case. Intended for use at 425 hertz between an interrupter and a bridged circuit in portable cord testing sets for toll switchboards. Approximate resistance of windings (l-2) and (3-7) is 98 ohms and .6 ohm respectively. OCTOBER 1970 NE-I07A REPEATING COIL STANDARD Toroidal coil having a permalloy core and is enclosed in a brass case. Has four windings and an electrostatic shield between windings (l-2) (5-6) and (3-4) (7-8). Has an impedance ratio of 600 to 600 between windings (l-2) (5-6) and (3-4) (7-8). Windings (l-2) and (5-6) have a dc resistance of approximately 5.7 ohms each. Windings (3-4) and (7-8) have a dc resistance of approximately 6.4 ohms each. SEE RATINGS APRIL 1973 NE-108 TYPE REPEATING COILS BELOW Toroidal type coils have permalloy cores and enclosed in mounting centres are 3.50 inches by Operates over the voice frequency range. Impedance Approximate Ratio Resistance of Windings dc (4-3)(8-7) Code (2-I) (4-3) (6-5) (8-7) (2-1;;6-5) Rating NE-108A 3.2 4.1 3.2 4.1 1.5 to 1 A&M ONLY NE-108C 17.3 15.0 17.2 15.0 1600 to 1420 Standard OCTOBER 1970 NE-IOSA REPEATING COIL STANDARD Shell type coil enclosed in a metal case. Windings Approx Resistance of each (ohms) Optimum Terminating Impedance (l-2) (3-4) and and (l-2) (3-4) (5-b) (7-g) (5-6) U-8) 1650 1.78 27000 30 Intended for use in the 1000 hertz signalling directional selection circuit. OCTOBER 1970 NE-IIOA REPEATING COIL STANDARD Straight core type coil. Intended for use in supervisors' telephone sets. Impedance ratio between windings (l-2) and (3-4) is approximately 250 to 2000. PRIMARY 2 2: SECONDARY JUNE 1973 SEE RATINGS NE-III TYPE REPEATING COILS BELOW (Card 1) Each consists of windings on a permalloy core, enclosed in a metal case. Closest recommended mounting centres are 2.625 inches by 4.250 inches. NE-111A: Has an electrostatic shield between windings (3-4) (7-8) and (l-2) (5-6) connected to terminal "S." Shield is also connected to the case. NE-IIIR Has an impedance ratio of 600:40 ohms, between windings (3-4) (7-8) and (1-Z) (5-6). Intended for use in the NE-1A sending panel. NE-111B: Intended for use in the NE-1A impedance unbalance measuring panel. Designed to operate over a frequency range from 100 to 5000 hertz. NE--111~ Approximate dc Resistance of Windings (ohms) ___- (l-2) & (5-6) (3-4) & (7-8) NE-Ill A. ALSO GENERAL Code in series in series Rating DESIGN AND DIMENSIONS OF -___ NE-III TYPE NE-111A 1.7 25.5 Standard NE-111B 112.0 2.0 II JUNE 1973 SEE RATINGS NE-III TYPE REPEATING COILS BELOW (Card 2) NE-111C: Has an electrostatic shield between windings (3-4) (7-8) and (l-2) (5-6) connected to terminal "S." Has an impedance ratio of 600:600 ohms between windings (7-8) (3-4) and (5-6) (l-2). Intended to operate directly from a 600 ohms cable into a 600 ohms line corrector over the frequency range of 35 to 8000 hertz. Intended for use with the regulating and non-regulating repeaters for program transmission over long No 16 gauge cable circuits equipped with B22 loading. Approximate dc Resistance of Windings (ohms) (l-2) 6 (5-6) (3-4) & (7-8) Code in series in series Rating NE-111C 35 35 Standard OCTOBER 1970 NE413A REPEATING COIL STANDARD Shell type coil having a silicon steel core and enclosed in a cast iron case arranged to mount on mounting plates. Intended for use in power ringing circuits. Has an impedance ratio of 1 to 10 between windings (1-Z) and (3-4). The dc resistance of winding (l-2) is approximately .05 ohm and of winding (3-4) is approximately .76 ohm. Operates on a frequency range of 350 to 450 hertz. SEE RATINGS FEBRUARY 1972 NE-115 TYPE REPEATING COILS BELOW Shell type coils having a silicon steel core clamped between two cast iron end housings, one of which is provided with mounting lugs. Operate on a frequency range from 300 to 700 hertz. Intended for use in power ringing circuits. Approximate dc Resistance Ratio of Turns per Winding Code per Winding (Ohm) Rating (l-2):(3-4)::l.l NE-115A (l-2):(3-3T)::1:.75 (l-2).010 Standard I (l-2):(3-41):31:1.5 (3-4T).020 1 (l-2):(3-4)::1:3 NE-115B (l-2):(3-3T)::1:2.25 (l-2).010 II r (l-2):(3-4T)::1:4.5 (3-4T).14 1 (l-2):(3-4)::l:lO II NE-115C (l-2):(3-3T)::1:7.5 (l-2).010 (l-2):(3-41)3:1:15 (3-4T)1.34 1 JUNE 1973 SEE RATINGS NE-119 TYPE REPEATING COILS BELOW I Toroidal type coils having permalloy cores and enclosed in metal cases. Closest recommended mounting centres are 2.625 inches by 4.375 inches. NE-119C: Operates over a frequency range of 35 to 8500 hertz. Intended for use in repeater circuits to operate out of a 600 ohms line into a 600 olm~s line corrector network. NE-119F: Operates with low transmission loss over the frequency range of 35 to 20,000 hertz and with low reflection coefficient from 250 to 2750 hertz. Series aiding connections may be obtained by strapping terminals 1 to 6, and 3 to 8. Electrically equivalent to ~~-1llD repeating coil. Intended for use in the J9350lF transmission measuring equipment. Resistance of Windings Impedance Ratio (Ohms) _~-- (l-2) (5-6) to Code O-2) (3-4) O-6) U-8) (3-4) (7-8) Rating 23 21 (a) Standard NE-119FNE-119C (b)5.223 ':.6 (b)5.2 2.6 1200 to 600 1, NE-IISC GENERAL DESIGN 8 DIMENSIONS OF NE-IIOF (a) Impedance ratio of 1 to 1.15 between windings (4-3)(8-7) and (Z-1)(6-5). (b) Windings (Z-1) and (6-5) are wound as a twisted pair. SEE RATINGS APRIL 1972 NE-120 TYPE REPEATING COILS BELOW (Card 3) Approximate dc Resistance (Ohms) of Windings Impedance Code (l-2) (2-6) (3-4) (4-8) (5-6) (5-7) (7-8) (7-9) (g-10) (10-12) __- __.__ -- Ratio Rating (a)(b)NE-12OM 8.56 - 8.56 - 12.13 505 - - - - c (c) 1:1.33 (f) 1:86.8 I Standard (d)(e)NE-120N 3.03 - 3.03 - 6.06 - 5.65 - 5.65 - (h)600:600+600 " Cd) (9) 5.80 - 5.80 - 11.60 - - - (m)600:900+900 ,, (j 1 (k) NE-12OP 6.90 6*go ~(n)600:1500+1500 1 (p)(r)NE-120s - 15.6 - 11.00 - - - - 400.0 - (s)900:900:3600 " (a) Windings (l-2) and (3-4) are parallel wound. Series aiding connections can be obtained by strapping terminal 2 to 3. Terminal 6 is tap on winding (5-7). Between windings (l-2), or (3-4), and (5-6). Windings (l-2), (3-4), and (5-6) are parallel wound. Series aiding connections can be obtained by strapping terminal 2 to 3 and terminal 4 to 5. (e) Windings (7-8), and (9-10) are parallel wound. Series aiding connections can be obtained by strapping terminal 8 to 9. (f) Between windings (l-2), or (3-4), and (5-7). (9) Terminal 8 is tap of winding (7-9). (h) Between windings (7-B), (g-10), and (l-2), (3-4), + (5-6). (j) Terminal 11 is tap of winding (10-12). (k) Windings (7-g), and (10-12) are parallel wound. Series aiding connections can be obtained by strapping terminal 9 to 10. Between windings (7-9), (lo-12), and (l-Z), (3-4), +(5-6). Between windings (8-9), (lo-ll), and (l-2), (3-4), +(5-6). With terminal 1 connected to 5. With terminal 3 connected to 7. Between windings (Z-l), (6-5), and (4-3), (8-7), and (q-10). OCTOBER 1970 NE423A REPEATING COIL STANDARD Toroidal type coil having a permalloy core and enclosed in a non-magnetic metal case. Impedance ratio of windings (Z-1) (6-5) to (4-3) (8-7) is 600 to 600 ohms, which also indicates the recommended terminating impedance. Intended for use in single side relay rack mounted carrier frequency repeaters. Closest recommended mounting centres 2.625 inches by 4.375 inches. Windings (l-2) and (S-6) have a dc resistance of approximately 5.7 ohms each. Windings (3-4) and (7-8) have a dc resistance of approximately 6.4 ohms each. Operates over a frequency range of 5 to 30 kHz. Electrically similar to NE-107A repeating coil. OCTOBER 1970 SEE RATINGS NE-124 TYPE REPEATING COILS BELOW Toroidal type coils with permalloy cores enclosed in metal cases. Closest recommended mounting centres are 3.500 inches by 1.750 inches. NE-124B: Intended for use in four-wire terminating sets in the coaxial conductor system and NE-J and NE-K type carrier systems. Approximate dc resistance of windings (3-4) and (7-8) is 8.3 NE-l24B ohms each and of windings (1-Z) and (5-6) is 24.4 ohms each. Has an impedance ratio of 200:600 ohms between windings (4-3) (8-7) and (2-l) (6-5). Operates over the voice frequency range. NE-124C: Intended for use in NE-J and NE-K type carrier channel to group connection. NE-l24C NE-124B ALSO GENERAL Approximate dc resistance of winding (l-2) is 7 ohms, of windings DESIGN AND DIMENSIONS (3-4) and (5-6) is 1.75 ohms each, and of (6T-R) is 67.5 ohms. OF NE-124C Has an electrostatic shield between winding (l-2) and windings (3-4) (5-6). Impedance ratio between windings (l-2) and (3-3T-4) (5-6T-6) is 600:135 + 135. Operates over a frequency range of 60,000 to 108,000 hertz. Code Rating NE-124B Standard NE-124C II @ OCTOBER 1970 NE-134A REPEATING COIL STANDARD Shell type coil enclosed in a metal case. Intended for use as the monitoring coil in connection with the vacuum tube amplifier used with the NE-7, NE-g, NE-10 and NE-11 service observing desks. High winding is bridged across a line. Low winding works into an input transformer of relatively high impedance of the amplifier. Impedance ratio between windings (4-3) (8-7) and (Z-l) (6-5) is 400 to 1. Operates over a frequency range of 200 to 3000 hertz. Average dc resistance of windings: Winding Ohms 2-1 3.4 6-5 3.4 4-3 2125 a-7 2125 OCTOBER 1970 NE-129A REPEATING COIL Toroidal type coil enclosed in a metal case. Average dc resistance of windings (2-l) and (6-5) is .33 ohms each and of (4-3) and (8-7) is 9 ohms each. Impedance ratio of windings (2-l) (6-5) to windings (4-3) (8-7) is 15 to 600 ohms, which also indicates the recommended terminating impedances. Designed for operation at 1000 hertz. Closest recommended mounting centres are 3.500 inches by 1.750 inches. Intended for use in the J94002A sending panel in common systems. MARCH 1971 NE-138B REPEATING COIL STANDARD 7 Consists of a two-winding coil, having a core type structure of "L" shaped, silicon steel laminations. Provided with two terminals on each spoolhead and is equipped with two mounting feet. A voice frequency repeating coil having an impedance ratio between windings (3-4) and (l-2) of 4.4:1. Approximate dc resistance of winding (1-Z) is 35 ohms and that of winding (3-4) is 185 ohms. Intended for use in the 12A transmission measuring set. SEE RATINGS MARCH 1971 NE- 140 TYPE REPEATING COILS BELOW Each consists of a shell type coil with a chromium pennalloy laminated core potted in a metal case provided with lugs for mounting. Operate over a frequency range of 60 to 10,000 hertz and are both electrostatically and electromagnetically shielded. Closest recommended mounting centres are 1.344 inches by 2.656 inches. NE-140A: Has an impedance ratio of 5,500 to 500 ohms between windings (3-4) (5-6) and (1-Z). The dc resistance of windings (3-4) and (5-6) in series is approximately 500 ohms and the dc resistance of winding (l-2) is approximately 70 ohms. Intended for use in the 2A noise measuring set. NE-14OC: Has an impedance ratio of 600 to 6 ohms between windings (3-4) (5-6) and (l-2). The dc resistance of winding (l-2) is approximately 0.45 ohm and the dc resistance of windings (3-4) and (5-6) in series is approximately 47 ohms. Intended for use in an analyzer attachment for 2 type noise measuring sets. Code Rating NE-140A Standard NE-140C 11 SEE RATINGS OCTOBER 1970 NE-142 TYPE REPEATING COILS BELOW Each consists of a coil wound on a silicon steel core. Insulated from mounting plate. Closest horizontal mounting centres are 1.250 inches and closest vertical mounting centres are 1.750 inches. Arranged to mount interchangeably with NE-B type relays. NE-142A: Intended for use in the 527951 subscriber or key pulsing sender of crossbar dial telephone systems. NE-142B: Intended for use in the 527901 subscribers sender of panel NE-142A. ALSO GENERAL DESIGN dial telephone systems. AN0 DIMENSIONS OF NE-142 TYPE NE-142C & NE-142D: Intended for use in the tandem sender of crossbar dial telephone systems. dc Resistance of Windings (ohms) Code (Prim) (S-2) (Tert) Rating (a)NE-142A 155 420 - Standard (a)NE-142B 35 95 460 11 NE-142A NE-142B 8 C NE-1420 (b)NE-142C 26 147 460 II (b)NE-142D (c) 90 ea 435 - ,I (a) Resistance values held to within 25%. (b) Resistance values held to within 210%. (c) Consists of two windings Pl and P2 wound in parallel. MARCH 1971 NE-146 TYPE REPEATING COILS I Each repeating coil consists of a metal case containing a toroidal type coil with a permalloy core. i c2t----lsi Each coil has an electrostatic shield connected to terminal "S". c-----*----I The shield is between the windings for which the impedance ratio is given. It is insulated from the case unless otherwise noted. Closest recommended mounting centres are 1.750 inches by 3.500 inches. Intended for use in C, J, K and L type carrier telephone systems. GENERAL DESIGN AND DIMENSIONS OF NE-146 TYPE MARCH 1971 NE-146 TYPE REPEATING COILS SEE RATINGS (Card 2) BELOW Approximate dc Resistance Dimensions of Windings (Ohms) (Inches) Frequency Range Code (l-2) (3-4) (3-5) (5-6) (7-8) Impedance Ratio between Windings A B (kHz) Rating (a)NE-146A 0.84 3.8 - 0.84 3.8 600:135 for (4-3)(8-7):(2-1)(6-5) 3.281 0.516 0.2-150 Standard NE-146B 0.12 0.45 - - - 20:67.5 for (l-2):(3-4) 3.281 0.516 4-3000 " (b)NE-146C 0.25 0.22 - 0.25 0.22 125:125 for (4-3)(8-7):(2-1)(6-5) 3.281 0.516 35-500 1, (c)NE-146D 0.5 0.25 - 0.25 - 125:125 for (l-2):(3-4)(5-6) 3.406 0.578 35-150 11 (d)NE-146E 0.45 - 0.93 - - 140:250 for (l-2):(3-4-5) 3.406 0.578 12-108 II (d)NE-146F 2.04 - 0.93 - - 600:250 for (l-2):(3-4-5) 3.406 0.578 12-108 ,I (a)NE-146G 0.27 0.75 - 0.27 0.75 600:135 for (4-3)(8-7):(2-1)(6-5) 3.281 0.516 60-108 I, (c)NE-146H 4.4 0.18 - 0.18 - 600:125 for (l-2):(3-4)(5-6) 3.406 0.578 36-84 I! (c)NE-146J 0.90 0.20 - 0.20 - 125:50 for (l-2):(3-4)(5-6) 3.281 0.516 35-1000 " (c)NE-146K 0.85 0.22 - 0.22 - 125:67 for (l-2):(3-4)(5-6) 3.281 0.516 35-1000 !1 (c)NE-146L 0.90 0.26 - 0.26 - 125:82 for (l-2):(3-4)(5-6) 3.281 0.516 35-1000 " (c)NE-146M 0.90 0.28 - 0.28 - 125:95 for (l-2):(3-4)(5-6) 3.281 0.516 35-1000 " (c)NE-146N 0.85 0.34 - 0.34 - 125:160 for (l-2):(3-4) (5-6) 3.281 0.516 35-1000 " (c)NE-146P 0.54 1.0 - 1.0 - 100:135+135 for (1:lT-2): 3.281 0.516 60-500 11 (3-3T-4)(5-6T-6) (a) Windings (3-4) and (7-8) are parallel wound. Series aiding connections can be obtained by strapping terminal 2 to 5 and terminal 4 to 7. (b) Windings (l-2) and (5-6), also windings (3-4) and (7-8) are parallel wound. Series aiding connections can be obtained by strapping terminal 1 to 6 and terminal 3 to 8. (c) Windings (3-4) and (5-6) are parallel wound. Series aiding connections can be obtained by strapping terminal 4 to 5. (d) Terminal 4 is the centre tap of winding (3-5). (e) Series aiding connections can be obtained by strapping terminal 4 to 5. MARCH 1971 NE-146 TYPE REPEATINGCOILS SEE RATINGS (Card 3) BELOW Approximate dc Resistance Dimensions of Windings (Ohms) (Inches) Frequency Range Code (l-2) (3-4) (3-5) (5-6) (6-8) (7-8) Impedance Ratio between Windings A B &Hz) Rating 1.4 - - 170:135+135 for (l-lT-2): (c)NE-146s 1.6 1.4 - (3-3T-4)(5-6~-6) 3.281 0.516 12-230 Standard - 30.5 600:600+600 for (l-2): 3.281 0.516 0.2-3.5 II (f)(g)NE-146T 22.2 - 30.5 - (3-4-5)(6-7-8) (a)NE-146U 9.1 7.7 - 9.1 - 7.7 600:600.for (l-2)(5-6):(3-4)(7-8) 3.281 0.516 4-31 (b)NE-146W 0.27 0.27 - 0.88 - 0.88 108:700 for (l-2)(3-4):(5-6)(7-8) 3.281 0.516 60-108 (c)NE-146Y 0.47 0.33 - 0.33 - - 72:68 for (l-2):(3-4)(5-6) 3.281 0.516 60-525 (c)NE-146AA 0.46 0.37 - 0.37 - - 72:91 for (l-2):(3-4)(5-6) 3.281 0.516 60-525 (d)NE-146AC 0.30 0.30 - 0.57 - 0.57 135:285 for (l-2)(3-4):(5-6)(7-8) 3.281 0.516 60-300 (c)NE-146AD 0.8 0.3 - 0.3 - - 72:125 for (l-2):(3-4)(5-6) 3.281 0.516 64-516 (c)NE-146AE 0.5 0.05 - 0.05 - - 72:25 for (l-2):(3-4)(5-6) 3.281 0.516 1556-2044 (c)NE-146AF 0.5 0.05 - 0.05 - - 72:33 for (l-2):(3-4)(5-6) 3.281 0.516 620-2356 (c)NE-146AG 0.5 0.08 - 0.08 - - 72:46 for (l-2):(3-4)(5-6) 3.281 0.516 564-1052 (a) Windings (l-2) and (5-6), also windings (3-4) and (7-8) are parallel wound. Series aiding connections can be obtained by strapping terminal 2 to 5 and terminal 4 to 7. (b) Windings (5-6) and (7-8) are parallel wound. Series aiding connections can be obtained by strapping terminal 2 to 3 and terminal 6 to 7. (c) Windings (3-4) and (5-6) are parallel wound. Series aiding connections can be obtained by strapping terminal 4 to 5. (d) Windings (l-2) and (3-4), also windings (5-6) and (7-8) are parallel wound. Series aiding connections can be obtained by strapping terminal 2 to 3 and terminal 6 to 7. (e) Series aiding connections can be obtained by strapping terminal 4 to 5. (f) Terminal 4 and 7 are centre taps of windings (3-4-5) and (6-7-8), respectively. (g) Series aiding connections can be obtained by strapping terminal 5 to 6. NE-146 TYPE REPEATING COILS SEE RATINGS MARCH 1971 BELOW (Card 4) Approximate dc Resistance Dimensions of Windings (Ohms) (Inches) Frequency Range Code (l-2) (3-4) (3-5) (5-6) (6-8) (7-8) Impedance Ratio between Windings A B (kHz) Rating (a)NE-146AH 0.5 0.1 - 0.1 - - 72:66 for (l-2):(3-4)(5-6) 3.281 0.516 312-552 Standard (a)NE-146AJ 0.5 0.1 - 0.1 - - 72:75 for (l-2):(3-4)(5-6) 3.281 0.516 68-308 " 135:135+135 for (l-lT-2): (b)NE-146AE 1.4 1.4 - 1.4 - - (3-3T-4)(5-6T-6) 3.281 0.516 10-100 " (c)NE-146AL 0.27 0.27 - 0.78 - 0.78 i08:600.for (l-2)(3-4):(5-6)(7-8) 3.281 0.516 60-108 U (a)NE-146AM 0.5 0.15 - 0.15 - - 72:400 for (l-2):(3-4)(5-6) 3.281 0.516 2172-2788 " 135:135+600 for (1-Z): (d)NE-146AN 0.6 - 2.3 - 2.3 - (3-4-5)(6-7-8) 3.281 0.516 60-108 " (a) Windings (3-4) and (5-6) are parallel wound. Series aiding connections can be obtained by strapping terminal 4 to 5. (b) Windings (1-1T) and (lT-2) are parallel wound. Also windings (3-3T), (3T-4), (5-6T) and (6T-6). Series aiding connections can be obtained by strapping terminal 4 to 5. (c) Windings (5-6) and (7-8) are parallel wound. Series aiding connections can be obtained by strapping terminal 2 to 3 and terminal 6 to 7. (d) Series aiding connections can be obtained by strapping terminal 5 to 6. OCTOBER 1970 SEE RATINGS NE-150 TYPE REPEATING COILS BELOW Shell type coil with silicon steel core enclosed in a metal case. Closest recommended mounting centres are 1.750 inches 1 by 3.500 inches. ~ Intended for use in the NE-H type carrier telephone I equipment. NE-150A: Works out of a modulator and into a 600 ohm band pass filter. NE-150B: Works out of a 600 ohm band pass filter and into a demodulator. Impedance Ratio Resistance of Windings between Frequency (ohms) Windings (3-4) (5-6) Range Code (l-2) (3-4) (5-6) and (l-2) (hertz) Rating ___- NE-150A 8.4 19.5 19.5 2000 to 600 4150 to 10,150 Standard NE-150B 8.9 12 12 1200 to 600 4150 to 10,150 I, JANUARY 1965 No. 151A REPEATING COIL STANDARD Shell type coil Ilaving a pe,malloy core and enclosed in a metal case. Impedance ratio of windings (2-l) (6-5) and (3-4) 1 (7-X) is 1600 to 600 plus 600, which also intlicatcbs the ~MWI~I- mended terminating impedances in ohms. 1 I Approximate U.C. resistance of windings i 1-Z) and (G-5 I is 25.5 ohms each, of windings (3-4) and (5-8) is 15 I ohms each and of windings (3-RT), (3T-4). (7-R’fi anrl (RT-8) is 7.6 ohms each. Operates over the frequency range of 250 to :~COO rycles per second. (‘losest recommended nlountiny centc1l.s HI’C I -:: ‘-1 inch Impedance ratio of windings (1-Z) and (3-3T-4) (7-8T-8) is 600 to 600 plus 600, which also indicates the recommended terminating impedance in ohms. Average dc resistance of winding (l-2) is approximately 21 ohms and of winding (3-3T), (3T-4), (7-8T), and (8T-8) is approximately 7.8 ohms each. Terminals 3T and 8T are centre taps of winding (3-4) and (7-8), respectively. Operates over the voice frequency range. Closest recommended mounting centres are 1.750 inches by 3.188 inches. Intended for use in four-wire terminating sets of NE-C5 types, NE-J, and NE-K carrier telephone systems. OCTOBER 1970 SEE RATINGS NE-154 TYPE REPEATING COILS BELOW I I Shell type coils having permalloy cores enclosed in metal cases. Closest recommended mounting centres are 1.750 inches by 3.500 inches. Intended for use on the monitoring and talking panel, J68732B, in NE-J and NE-K types carrier telephone systems. NE-154A: Approximate dc resistance of winding (1-2) is 14.1 ohms and of windings (3-4) (5-6) connected in series opposing is 59.4 ohms. NE-154A Has an impedance ratio of 60 to 6 + 301) hD+r.r.=on r~~--l~---- i 1 ,- ^. MARCH 1971 NE456B REPEATING COIL STANDARD Toroidal type coil with a permalloy core potted in a metal case arranged for single side mounting. Equipped with tapped windings to make it possible to vary its ratio. This variable ratio is used to adjust the level of the pilot frequencies. Frequency range is from 5 to 30 kHz. I-2250---I Approximate dc resistance of the winding (l-2) is 31 ohms, (3-6) is 0.60 ohm and (7-14) is 0.120 ohms. Closest recommended mounting centres are 2.625 inches by 3.500 inches. f-- Intended for use in the NE-91 type filters in the C type carrier / telephone equipment. 3 438 I I i MARCH 1971 NE-157A REPEATING COI L STANDARD Toroidal type coil with a pennalloy core potted with two capacitors in a paper carton. Has flexible terminal leads 10.00 inches long. Has an impedance ratio of 600:52.5 ohms between windings (4-3) (S-7) and (2-l) (6-5) and operates over a frequency range of from 5 to 30 kHz. Not more than one of these coils should be mounted in the same filter container without suitable shielding between the coils. Suitable shielding should also be provided between this coil and other apparatus in the same container. Nominal dc resistance of windings (2-l) and (6-5) is 0.49 ohm each and of windings (4-3) and (8-7) is 3.43 ohms each. Intended for use in the NE-89A filter in the C5 carrier telephone system. SEE RATINGS OCTOBER 1970 NE-159 TYPE REPEATING COILS BELOW / Have a frequency range of 64 kHz to 108 kHz. lk ---T An electrostatic shield is provided between the windings I for which the impedance ratio is given below. II 7 ‘ii; Closest recommended mounting centres are 1.750 inches by 27 I 7.875 inches. 37 A-F NE-159A: Shell type coil, having a permalloy core, and two networks ’ L ------6f.-----dgf enclosed in a metal case. L------T= 25 ------__- +I Has an impedance ratio of 1400 to 400 + 400 between windings (l-2) and (3-3T-4) (5-6T-6). Approximate dc resistance of windings (l-Z), (3-6), (4-5) and (3T-6T) is 7.9, 9.2, 9.2 and 3.8 ohms, respectively. Intended for use between two 5687358 carrier generators and the multiple end of six carrier supply filters in the 568735D distribution equipment in NE-J, NE-K and NE-L carrier telephone systems. NE-159B: Shell type coil, having a permalloy core, enclosed in a metal case. Has an impedance ratio of 1400 to 200 between windings (1-2) and (3-4). Approximate dc resistance of windings (l-2) and (3-4) is 7.53 and .082 ohms, respectively. Intended for use in the 568735D channel carrier distribution J- equipment in NE-K and NE-L type carrier telephone systems. NE-159A ALSO GENERAL DESIGN AND DIMENSIONS Code Rating OF NE-159B NE-159A Standard NE-159B II OCTOBER 1970 NE-IGOA REPEATING COIL STANDARD Toroidal type coil having a permalloy powder core and assembled with a duolateral wound air core inductor in a metal case. Has an impedance ratio of 26.3 to 3,000 between windings (l-2) and (5-6) connected in parallel and winding (3-4) at a frequency of 120,000 hertz. Has an impedance ratio of 125 to 3550 between windings (Z-1) and (6-5) connected in series and windings (3-4) and (7-8) connected in parallel at a frequency of 340,000 hertz. Approximate dc resistance of windings (l-2) (5-6) with terminals 2 & 6 connected is .06 ohm, of winding (3-4) is 7.7 ohms and of winding (7-8) is 2.1 ohms. An inductor is connected to terminals (7-8). Has an electrostatic shield between windings ( l-2) (5-6) and (3-4). Closest recommended mounting centres are 1.750 inches by 3.500 inches. Intended for use in 568735B generator transfer circuit of the NE-J and NE-K type cable carrier terminal equipment. OCTOBER 1970 NE462A REPEATING COIL STANDARD Toroidal type coil with ring type permalloy core enclosed in a metal case. Has an impedance ratio of 1 to 1.12 between windings (3-4) (7-8) and (l-2) (5-6). Operates over a frequency range of 35 to 8,000 hertz. Approximate dc resistance of windings (l-2) and (5-6) is 17.4 ohms each and of windings (3-4) and (7-8) is 16.4 ohms each. Closest recommended mounting centres are 5.25 inches by 5.25 inches. Intended for use between 600 ohms program circuits which are equipped for reversing the direction of transmission. SEE RATINGS OCTOBER 1970 NE-165 TYPE REPEATING COILS BELOW Each consists essentially of a toroidal type coil having a permalloy powder core and potted in a metal case. In addition, the NE-165C contains two capacitors. An electrostatic shield is provided between the windings and is connected to terminal "S." The shield is insulated from the case. Closest recommended mounting centres are 1.750 inches by 2.625 inches. NE-165B: NE-1658 Has an impedance ratio of 75 to 600 ohms between windings (l-2) and (3-5), and operates from a 75 ohm filter into a bridge type modulator over the frequency range of 312 kHz to 552 kHz. Terminal 4 is a centre tap on winding (3-5). NE-165C: Has an impedance ratio of 15 to 75 ohms between windings (l-2) and NE-16512 (3-4) and operates from a 75 ohm filter into a bridge type modulator over the frequency range of 620 kHz to 3100 kHz. A 2000 pF maximum capacitor is connected across winding (l-2) and a 300 pF maximum capacitor is connected across winding (3-4). NE-165D: Has an impedance ratio of 135 to 3.8 ohms between windings (5-6) and (1-Z) (3-4). Intended for operation at 120 kHz. Approx dc Resistance (ohms) of Windings NE-It6513 ALSO GENERAL DESIGN Code (l-2) (3-4) (3-5) (5-6) Rating AND DIMENSIONS OF NE-165 TYPE NE-165B .36 .5 Standard NE-165C .04 .13 II NE-165D .03 .03 .63 II OCTOBER 1970 NE-166A REPEATING COIL STANDARD Toroidal type coil with permalloy core enclosed in a Ineta case* Has an impedance ratio of 600 to 240 between windings (5-8) . . and (l-4). -‘ll,I * * . x Operates over a frequency range of 50 to 10,000 hertz. Approximate dc resistance of winding (l-4) is 4 ohms and of winding (5-B) is 12.4 ohms. Provided with electrostatic shields between windings (l-4) and (5-8). Closest recommended mounting centres are 2.625 inches by 4.375 inches. Intended for use in head receiver monitoring circuits in programme transmission systems. SEE RATINGS OCTOBER 1970 NE-167 TYPE REPEATING COILS BELOW Each consists of a toroidal type coil with a permalloy core enclosed in a metal case. Operates over a frequency range of 36,000 to 150,000 hertz. Closest recommended mounting centres are 2.625 inches by 3.500 inches. Intended for use in the NE-J type carrier telephone systems. NE-167A: Has an impedance ratio of 125 to 142 between windings (l-2) and (8-3) (6-13). An arrangement of high and low impedance taps in windings (8-3) (6-13) covers the impedance range of 110 to 142 ohms in steps of about 2.5 ohms. Average dc resistance of winding (l-2) is .6 ohm and of windings (3-8) and (6-13) is .4 ohm each. Has an electrostatic shield between windings (l-2) and (8-3) (6-13). NE-167B: Has an impedance ratio of 585 to 142 ohms between windings (l-2) and (8-3), (6-13). An arrangement of high and low impedance taps on the 142 ohm winding covers the impedance range of 110 to 142 ohms in steps of about 2.5 ohms. NE-167A. ALSO GENERAL Average dc resistance of winding (l-2), (3-8) and (6-13) are approximately 3.3 ohms, .4 ohm and .4 ohm, respectively. DESIGN AND DIMENSIONS OF NE-167 B. Code Rating NE-167A Standard NE-167B II OCTOBER 1970 NE-168A REPEATING COIL STANDARD I I Toroidal type coil having a permalloy powder core and an adjusting capacitor enclosed in a metal case. Has an impedance ratio of 135 to 25,000 between windings (l-2.) (3-4) and (5-6). Operates over a frequency range of 58,000 to 111,000 hertz. Approximate dc resistance of windings (1-Z) (3-4) is 2.7 ohms and of winding (5-6) is 85 ohms. Closest recommended mounting centres are 1.750 inches by 3.500 inches. Intended for use in the 568762E pilot channel amplifier rectifier in the NE-J2 carrier terminal equipment. MARCH 1971 SEE RATINGS NE-169 TYPE REPEATING COILS BELOW Consists of a shell type coil wound on a permalloy core, and a capacitor or capacitors potted in a metal case which is arranged for single side mountings. Closest recommended mounting centres are 3.500 inches by 1.750 inches. Approximate dc Impedance Frequency Code Windings Resistance (Ohms) Ratio (Ohms) Range (kHz) Rating NE-169A (l-2)(3-4) 141.1.25 135:22300 60 to 108 Standard NE-169C (3-4)(l-2) 140.1.39 135:18500 60 to 108 " II NE-169D (3-4)(l-2) 204.2.7 135:21000 12 to 60 NOVEMBER i970 NE-170 TYPE REPEATING COILS (Card 1) -164-32 TAP 2 HOL .ES RD-WH LONG 1 ‘GN “et- ri H i BK 3’ I4 I NE-170A NE-170B NOVEMBER 1970 NE-170 TYPE REPEATING COILS SEE RATINGS (Card 2) BELOW Shell type coils having a permalloy core and enclosed in metal cases. Closest recommended mounting centres are 1.812 inches by 1.812 inches. NE-170A: Has an impedance ratio of 420 to 2140 between windings (red-red white) and (blue-blue white). Approximate dc resistance of winding (red-red white) is 81 ohms and of winding (blue-blue white) is 440 ohms. Has an electrostatic shield between windings. Operates over the frequency range of 2.0 to 15,000 hertz. Intended for use in a volume indicator, in connection with programme transmission circuits. NE-170B: Has an impedance ratio of 600 to 600 between windings (red-red white) (blue-blue white) and (green-brown). Approximate dc resistance of windings (red-red white) and (blue-blue white) in series is 108 ohms and of winding (green-brown) is 88 ohms. Provided with electrostatic and electromagnetic shielding. Lead (green white) is centre tap of winding (green-brown). Operates over the frequency range of 30 to 10,000 hertz. Code Rating NE-170A Standard NE-170B ,I SEE RATINGS JANUARY 1965 No. 173 TYPE REPEATINGCOILS BELOW Each consists of a shell type coil enclosed in a metal case. Operates over the (i- I-:-. : voice frequency range. ,;r-- ~~ -7 ~ Closest recommended mounting centers are 3-3/16 inches by l-3/4 inches. ci.. I 5 ’ Line windings are balanced for derivation of phantom circuits. They are di- 10,:G vided into three groups to indicate the D.C. resistance of line windings. f ‘(2 : Those resistances within -t 5’,; of the average are marked with the letter “IX” and those with resistances below or above this range are marked with I the letter “A” or “C,” respectively. In order to reduce longitudinal noise ~~1’ in the phantom circuit, it is desirable that the two coils in the respective side circuits have the same group letter,. In ordering coils for new equipment no reference to group should be made. The coils will be shipped in multiples of foul, of a kind (for the Nos. 173A to 1) and 173 AS to DS) and two of a kind (for the Nos. 173E and ES) as far as the number ordered makes it pos- sible. In ordering coils for replacements, the group letter should be specified. (‘ode numbers having a letter “S” as the last letter of the code number such as Nos. 173AS, 173BS, etc., are the same as the Nos. 173A, 173B, etc., respec- tively, except that they have silicon steel COI~CYinstead ot’ pern~alloy cores. Imped. Ratio Bet. Wind. Code (-1-3) (8-7) (10-9) (12-11)-~--..-..- Resistance__--. ----(Ohms) - of Winding __~No. and...____- (2-l) (6-5) __.______(1-i) (3-4) ---..-...-..---(5-G) (7-8) (9-10)-- -_. .-(11-12) ~.-_ Rating 173A 2. :1 1x !I IS !i NOT MANUFACTtiREU 3.38 : 1 19 1s 19 1: 1: STKNDARD ::: 27 ) “7 27 “7 “ :;;; 4.GO:l I‘ 1736 1.20:1 18 5.8 k 5.x 5.8 5.8 1’73E 2. :l 18 9 1X 9 9 9 173AS 0 :1 18 9 18 9 9 9 NOT M’hNUFACTURE’C 18 19 14 19 19 19 “ “ iiS :l “ : % 4.60 :1 18 27I 18 :?7 27 .27 “ 1 ‘20 *I 1x 5.8 18 5.8 5.8 5.8 ‘I “ :;% 2: I1 1 s 9 1x !I 9 9 “ I‘ FEBRUARY 1971 NE-173 TYPE REPEATING COILS SEE RATINGS BELOW TERMlNALNUMBERS IRE Each consists of a shell type coil enclosed in a metal case. Operates over the FORREFERENCE ONL" \, voice frequency range. Closest recommended mounting centres are 3.188 inches by 1.750 inches. ,[$f$$Ffj) Line windings are balanced for derivation of phantom circuits. They are divided into three groups to indicate the dc resistance of line windings. Those resistances -7 -8 within ?5% of the average are marked with the letter "B" and those with resistances 438 -- b - ? 2x -* i below or above this range are marked with the letter "A" or "C," respectively. In +- ---5,25 ~~~ +j order to reduce longitudinal noise in the phantom circuit, it is desirable that the two coils in the respective side circuits have the same group letter. In ordering coils for new equipment no reference to group should be made. The coils will be shipped in multiples of four of a kind (for the NE-173B to D) and two of a kind (for the NE-173E) as far as the number ordered makes it possible. In ordering coils for replacements, the group letter should be specified. Imped Ratio Bet Wind Resistance (Ohms) of Winding (4-3) (8-7) (10-9) (12-11) ~ Code and (2-l) (6-5) (l-2) (3-4) (5-6) (7-8) (g-10) (11-12) Rating NE-173B 3.38:1 18 19 18 19 19 19 Standard NE-173C 4.60:1 18 27 18 27 27 27 II NE-173D 1.20:1 18 5.8 18 5.8 5.8 5.8 II NE-173E 2. :l 18 9 18 9 9 9 II NE-174A REPEATING COIL STANDARD Consists of two identical coils with shell type pennalloy cores, potted in a single metal case. Has an impedance ratio of 600 to 100,000 between windings (l-2) and (3-4), and between windings (5-6) and (7-8). Provided with an electrostatic shield between windings (1-2) and (3-4), and between windings (5-6) and (7-8). Operates over a frequency range of 255 to 3145 hertz. Approximate dc resistance of windings (l-2) and (5-6) is 8.9 ohms each, and of windings (3-4) and (7-8) is 1600 ohms each. J Closest recommended mounting centres are 1.750 inches by 3.500 inches. Intended for use with NE-40Cl type carrier telegraph equipment. OCTOBER 1970 NE-175A REPEATING COIL STANDARD Consists of a toroidal type coil having a permalloy core potted in a metal case. Has an impedance ratio of 1 to 1 between windings (l-2) (3-4) and (5-6) (7-8). Approximate dc resistance of windings (1-Z) and (3-4) is 35.5 ohms each and of windings (5-6) and (7-8) is 51 ohms each. I6 Closest recommended mounting centres are 1.750 inches by I 4 3.500 inches. Intended for use in telephone systems in connection with 20 hertz slgnalllng through two-wire repeaters at terminals and 1 1 intermediaie points. OCTOBER 1970 NE-176A REPEATING COIL STANDARD Toroidal type coil having a silicon steel core and enclosed in a metal case. Intended for operation at voice frequencies. Has an impedance ratio of 600 to' 600 between windings (l-2) (5-6) and (3-4) (7-8). Closest recommended mounting centres are 2.125 inches by 4 inches. Intended for use in manual long line circuits. Electrically equivalent to NE-67C repeating coil. Approximate dc Winding Resistance (ohms) (l-2) 20 21 (3-4) Parallel Wound (7-8) 3 21 (5-b) 20 Series aiding connections can be obtained by strapping terminal 4 to 7 and by strapping terminal 2 to 5. OCTOBER 1970 NE-1788 REPEATING COIL STANDARD Consists of two coils having windings on permalloy cores and four capacitors potted in a metal case. Has an impedance ratio of 75:75 + 75:75 ohms between windings (l-2):(3-4) + (5-6):(7-8) and is intended to operate over the frequency range of 60 kHz to 3000 kHz. When each winding is terminated in 75 ohms, the hybrid loss from winding (l-2) to (7-8) is greater than the hybrid loss from winding (5-6) to (3-4). A capacitor is connected across each winding. Approximate dc resistance of windings (l-2) and (7-8) is -23 ohms each and of windings (3-4) and (5-6) is .72 ohms each. Closest recommended mounting centres are 2.625 inches by 4.375 inches. Intended for use in NE-L type carrier telephone systems. SEE RATINGS JANUARY 1965 Nos. 179A SC B REPEATING COILS BELOW Toroidal type duolateral wound coils having a permalloy core and potted in a metal case. Provided with an electrostatic shield between windings for which the impedance ratio is given below. Closest recommended mounting centers are l-3/4 inches by 2-Ii/8 inches. 179A : Intended for use in the J-68787A reversing panel. 179B: Intended for use in the J-64031A transmission meas- uring set. Approximate D.C. Res. (Ohms) Code of windings Center Impedance Frequency No. (1-2) ____-(3-4) (5-6-7) - Tap Ratio (cycles) Rating (b)(c)179A 10 10 86 6 (a)2,‘700:25,000 60.000 to 108,000 Standard (b)179B .l .l 11 6 (a) 70:20,000 455,000 “ (a) Between windings (1-2) (34) and (5-6-7). (c) Windings (l-2) and (R-4) are parallel wountl. (b) Series aiding connections can be obtained by connecting terminal 2 to 3. 8 P R 0 P ER T Y Nodbern E/ecfff? Company L I M I T E D SEE RATINGS FEBRUARY 1971 NE-179 TYPE REPEATING COILS BELOW Toroidal type duolateral wound coil having a permalloy core and potted in a metal case. Provided with an electrostatic shield between windings for which the impedance ratio is given below. Closest recommended mounting centres are 1.750 inches by 2.625 inches. NE-179A: Intended for use in the J68787A reversing panel. NE-179B: Intended for use in the J64031A transmission measuring set. Approximate dc Res (Ohms) of Windings Centre Impedance Frequency Code (l-2) (3-4) (5-6-7) Tap Ratio (hertz) Rating (b)(c)NE-179A 10.0 10.0 86 6 (a)2,700:25,000 60,000 to 108,000 Standard (b)NE-179B 0.1 0.1 11 6 (a) 70:20,000 455,000 11 (a) Between windings (l-2) (3-4) and (5-6-7). (b) Series aiding connections can be obtained by connecting terminal 2 to 3. (c) Windings (l-2) and (3-4) are parallel wound. INDUCTION COILS MANUFAC!TURE JANUARY 1965 DIRCONT~NUED (File as Card 1 on Induction Coils) The manufacture of the following induction coils has been discontinued and it is not considered necessary to maintain complete information in the catalogue. For information on codes not listed below, see other cards on induction coils. Code Replaced by Zode Replaced by Code Replaced by Code Replaced by 5 46 46B 65 (4 103B 10 (a, 46A Recoded as 46B 66 113A 13 46B 67 (3 113B 20 46B 46C 68 (4 113c 46D 69 113D 104A Recommended 2423 ::; 46E 70 120 28 48 71 146B 1OlA 29 77A or C recom. 55 55B 72A 146C 1OlA Recommended 30 55A Recoded as 55B 73A ::; 146F 31 55B 74A 155B 1OlA 32 77A or C recom. 56 75A 6) 178A 181B Recommended 33 23 57 76A 77A Recommended 178B 178D 34 58 77B 178C 178E 35 59 79A 79C Recommended 178D 181B Recommended 38A 60 LOlC 178E 181B Recommended 38B 61 LO2A 178A 178F 181B Reccmmended 42 42B 62 L02B 178B 178G 181C Recommended 44 63 LO2C 178C 45 64 103A (a) Replaced by a 181B plus a 115A adapter. (b) Replaced by a 181A plus a 103D adapter. STANDARD OCTOBER 1970 NE480A REPEATING COIL I I Toroidal type coil having a permalloy core and potted in a metal case. $. ---- 2% -;’ F-- -..---..--.-.5$ ____.__ f Has an impedance ratio of 600 to 870 between windings (1-Z) (5-6) and (3-4) (7-8). Operates over the frequency range of 35 to 10,000 hertz. Provided with an electrostatic shield between windings (1-Z) (5-6) and (3-4) (7-8). Series aiding connections can be obtained by connecting terminal 2 to 5 and terminal 4 to 7. Closest recommended mounting centres are 2.625 inches by 4.375 inches. Intended for use in the NE-K type carrier telephone single side band program equipment. Winding Approx dc Res (ohms) (l-2) 15 (s-6) 15 (3-4) 10 (7-B) Parallel Wound 10 OCTOBER 1970 NE482A REPEATING COIL STANDARD Consists essentially of a toroidal type coil, having a permalloy core, and a capacitor potted in a metal case. Has an impedance ratio of 72 to 72 + 72 between windings (l-2) and (3-4) (4-5). Operates over the frequency range of 300 to 2400 kHz. The capacitor (100 pF) is connected to terminals 3 and 5 of winding (3-4-5). An electrostatic shield, between windings (l-2) and (3-4-5) is connected to terminal "S." The shield is insulated from the case. r------l Terminal "6" has no connections made to it. , 2-r I6 i- Closest recommended mounting centres are 1.750 inches by 3.500 inches. I I 4s I Intended for use in the terminal circuits of the NE-L1 carrier telephone I 7 system. 3i6 Approximate dc Winding Resistance (ohm) (l-2) .20 r----L. (3-4) .35 (4-5) .35 MARCH 1972 SEE RATINGS NE-183 TYPE REPEATING COILS BELOW Each consists of a toroidal type coil with a permalloy powder core potted in a metal case. Closest recommended mounting centres are 1.688 inches by 2.625 inches. Nuts and lockwashers are furnished for mounting purposes. NE-183A: Intended for use in the .J68784C-1 for programme transmission on K type carrier telephone circuits. NE-183B: There is an electrostatic sh:eld between the windings. Intended for use in the NE-225D filter. Approximate Impedanace Frequency dc Resistance Ratio Range Code Winding (Ohms) (Ohms) (kHz) Rating (l-2) 0.12 NE-183A (3-4) 2.8 2O:'OOO 120 Standard U-6) 2.8 1 O-2) 0.70 NE-183B 13.0 1 135:1800 60 to 108 M (3-4) I JANUARY 1965 18% REZ'XATING COIL STANDARD I 1 I I Consists of a toroidal type coil with a pcrmalloy powder core potted in u rectm@ar metal case. Operates over the frequency range of 79.5 to 88 kilocycles per second, and has an ir+ pedance ratio of 216 to 1 ohms between windings (S4) (5-6) and (l-2). There is an electro- static shield between windings (l-2) and (3-4) (5-6). The shield is internally connected to the case. Average D:C. resistance of winding (l-2) is 0.08 ohm and of winding (3-4) (5-6) is 18.0 Ohms. Over-all dimensions are approximately l-19/32 in. a: 2-17/32 in. x 2-9/16 in. high, not including the terminals and mounting studs. Closest recommended mounting centers are l-11/16 in. x 2-5/8 in. Nuts and lock washers are furnished for mounting purposes. Intended for use in the 214AEqualizer. SEE RATINGS OCTOBER 1970 NE-185 TY PEccRJrEATING COILS BELOW a NE-185A: Consists of a toroidal type coil, having a permalloy care, and two capacitors which are potted in a metal case. Has an impedance ratio of 135 to 1619 between windings (l-2) and (3-5) and is intended for operation over the frequency range of 60 kHz to 300 kHz. Provided with an electrostatic shield which is connected to terminal "S". Approximate dc resistance of winding (l-2) is 1.1 ohms and of winding (3-5) is 14.6 ohms. Terminal 4 is a centre tap of winding (3-5). A 300 pF capacitor is connected across winding (l-2) and a 10 pF capacitor is connected across winding (3-5). Closest recommended mounting centres are 1.750 inches by 2.625 inches. This repeating coil is used in broad band carrier single sideband program equipment. NE-185B: Consists of a capacitor and two toroidal type coils potted in a rectangular metal case which is arranged for single side mounting. One of the coils is wound on a permalloy core and the other coil is wound on a core of permalloy powder. Intended to operate over the frequency range of 60 kHz to 108 kHz and has an impedance ratio of 135 to 30,000 between windings (l-Z-3) and (4-5). Approximate dc resistance of winding (l-2-3) is 0.5 ohms and of winding (4-5) is 61 ohms. Closest recommended mounting centres are 1.750 inches by 2.625 inches. Nuts and lock washers are furnished for mounting purposes. Intended for use in the NE-216A filter of the NE-K2 carrier telephone system. Code Rating NE-185A Standard NE-185B II OCTOBER 1970 SEE RATINGS NE-185 TYPE REPEATI NG COILS BELOW (Card 2) NE-185C: Consists of a toroidal type coil with a permalloy core and a capacitor potted in a rectangular metal case. Intended to operate over the frequency range from 60 kHz to 108 kHz and has an impedance ratio of 1800 to 130 ohms between windings (4-5) and (l-3). Terminal 2 is the centre tap of winding (l-3). There is an electrostatic shield between the windings. The reflection coefficient of winding (l-3) is less than 2.5 per cent and of winding (4-5) is less than 2.0 per cent. Approximate dc resistance of winding (l-3) is 1.l.O ohms and of winding (4-5) is 16.1 ohms. Closest recommended mounting centres are 1.750 inches by 2.625 inches. Nuts and lock washers are furnished for mounting purposes. Intended for use in the NE-225D filter. NE-185D: Consists of two toroidal type coils, wound on permalloy cores, and a capacitor potted in a rectangular metal case. Has an electrostatic shield connected to terminal "S". Operates over the frequency range from 60 kHz to 108 kHz and has an impedance ratio of 135 to 18,800 ohms between windings (l-2) and (3-4). Approximate dc resistance of winding (l-2) is 0.67 ohms and of winding (3-4) is 47 ohms. Closest recommended mounting centres are 1.750 inches by 2.625 inches. Nuts and lock washers are furnished for mounting purposes. Intended for use in the NE-166A filter. Code Rating NE-185C Standard NE-185D II SEE RATINGS OCTOBER 1970 NE-185 TYPE REPEATING COILS BELOW (Card 3) NE-185E: Consists of a toroidal type coil wound on a molybdenum permalloy core and two capacitors potted in a rectangular metal case. An electrostatic shield is provided between windings (l-2) and (3-5). This shield is electrically connected to terminal "S". Operates over a frequency range from 83 kHz to 88 kHz and has an impedance ratio of 135 ohms to 2430 ohms between windings (l-2) and (3-5). Terminal 4 is the mid-point of winding (3-5). The approximate dc resistance of winding (l-2) is 0.9 ohms and of winding (3-5) is 14.6 ohms. Closest recommended mounting centres are 1.750 inches by 2.625 inches. Mounting nuts and lockwashers are furnished. Code Rating NE-185E Standard OCTOBER 1970 STANDARD I NE-188A REPEATiNG COIL L 1 I Consists of two toroidal type windings on a permalloy core double shielded by means of rigid brass shields, and a capacitor potted in a metal case. Terminated in an NE-470B jack (3-4) and an NE-472B jack (1-2). Approximate dc resistance between the centre conductor and sleeve of the two jacks is 0.065 ohm and 0.096 ohm, respectively. Has an impedance ratio of 72 to 72 ohms between the centre conductor and sleeve of the two jacks and is intended to operate over the frequency range of 50 kHz to 10,000 kHz. Closest recommended mounting centres are 1.750 inches by 3.938 inches, Intended for use in the 5688276 sending console of the NE-L1 carrier telephone system. NOVEMBER1970 NE-189 TYPE REPEATING COILS T~Rv,,,AL DCSIGNlT\OkS ARE FOR REFERENCE ONLY L ARE NOT STAMPED ON REPCATlNG COILS : I .I38 OIA, I \ :------3L----.---q I------4!&Y------4 p------3+ ------.q I .___ ---,+ ------1 FIG I I- FIG 3 TTERYINAL DESIGNATIONS \.FOR REFERENCE ONLY. .I,G DIA I It------,q ------< I ;------3;“, ----- $ I W--+13 c------+------f ~----- ..- ,s------*II FIG 2 FIG 4 NOVEMBER 1970 NE-189 TYPE REPEATING COILS SEE RATINGS BELOW (Card 2) Each consists of a coil having windings on a silicon steel core assembled in a metal case provided with magnetic shielding. Intended to operate over the voice frequency range. Normally intended to mount on 1.250 inch horizontal centres and 1.750 inch vertical centres. However, where space is requized above or below the repeating coil for the adjustment of relays, the repeating coil should be rotated 90 clockwise when viewed from the terminal end and in this case 1.750 inch horizontal and vertical mounting centres are required. When ordering mounting plates for the latter arrangement, "Drill per arrangement A" should be specified. NE-189A: Insulated from mounting plate. Tap for winding (l-2) is clip "C" and for winding (3-6) is 4 and 5. Intended for use as a combined busy test and supervisory monitoring coil in operators' telephone circuits in local and toll switchboards. NE-189C: Has an impedance ratio of 4000 to 600 + 600 ohms between windings (7-8) and (l-2) (3-4) + (5-6). Intended for use in the NE-MlCl common carrier terminal per J98701B or the NE-Ml carrier telephone system. Works as part of a hybrid coil set with the NE-647B input transformer. Approximate dc Resistance (ohms) of Windine Code Fig (l-2) (3-4) (3-6) (5-6) (T-8) Rating NE-189A 3 44 49 Standard NE-189C 4 13.3 13.3 26.7 340 II @ PROPERTlOF THE No/l/lo/n kkvfric CoMPANYLiMlTED T !5.1K Q?J NOVEMBER 1970 NE-189 TYPE REPEATING COILS SEE RATINGS (Card 3) BELOW NE-189D: Has an impedance ratio of 43.5 ohms to 1 ohm between windings (3-4) and (l-2). Intended for use as a monitoring coil in the operator's telephone circuit of the NE-3CL toll switchboard. NE-189E: Has an impedance ratio of 8 to 1 between windings (3-6) and (4-5) and an impedance ratio of 1 to 1 between windings (3-6) and (l-2). Terminals 4 and 5 are taps on winding (3-6) and terminal 7 is a centre tap on winding (l-2). Intended for use as a combined busy test and monitoring coil in central office and PBX switchboards. NE-189F: Has an impedance ratio of 42 to 1500 ohms between windings (l-2) and (5-7) and between windings (3-4) and (5-7). Terminal 6 is a centre tap on winding (5-7). Intended for use in the common systems amplifier circuit SD95396-01. NE-189G: Has an impedance ratio of 900 to 600 ohms between windings (l-2) (3-4) and (5-6). Intended for use in the NE-P carrier telephone system. Approximate dc Resistance (ohms) of Windine Code Fig (l-2) (3-4) (j-6) (5-b) (5-7) Rating NE-189D 1 9.5 340 Standard NE-189E 2 44 49 II NE-189F 2 10.7 13.4 344.3 II NE-189G 1 56.5 56.5 63.4 II OCTOBER 1970 NE-191 A REPEATING COIL / STANDARD Toroidal type coil, having a permalloy powder core, potted in a metal case. tias du impedance ratio of 2500:72 ohms between windings (3-4) and (l--L) and is intended to operate at frequencies between 64 and 308 kHz. Approximate dc resistances of windings (l-2) and (3-4) are 0.65 ohm and 10.75 ohms, respectively. Lntended for use in the NE-225A filter. Intended to operate from a 7L olm circuit inl.o a 2500 ohm filter. Closest ~ecnmmended mounting centres are 1.750 inches by 3.500 inches. SEE RATINGS NOVEMBER 1970 NE-192 TYPE REPEATING COILS BELOW Each consists of windings on a permalloy core, and a capacitor, potted in a metal case. Closest recommended mounting centres are 1.688 inches by 2.625 inches. Nuts and lock washers are furnished for mounting purposes. NE-192A: Will operate over a 4 kHz band in the frequency range from 64 to 108 kHz, when used in each of NE-136E to NE-136s filters. Has an impedance ratio of 900:25 ohms between windings (4-5) and (l-3). Terminal 2 is the centre tap of winding (l-3). In series with the 900 ohm winding there is a balanced inductor coil which is adjusted to make the inductance of this winding with winding (l-3) short circuited 23.87 millihenrys. Approximate dc resistance of winding (l-3) is 0.18 ohm and of winding (4-5) is 33 ohms. Intended for use in the NE-136E to NE-136s filters. NE-192B: Has an impedance ratio of 135:10,000 ohms between windings (l-2) and (3-4) and is intended to operate at a frequency of 92 kHz. Approximate dc resistances of windings (1-2) and (3-4) are 3.4 ohms and 104.3 ohms, respectively. The capacitor is connected across terminals 1 and 2. Provided with an electrostatic shield between the windings which is connected to terminal S. Intended for use in the 92 kHz amplifier-rectifier for broadband carrier. Code Rating NE-192A Standard NE-192B 9, MARCH 1971 NE-193A REPEATING COIL STANDARD Toroidal type coil with a permalloy core potted in a metal case. Has an impedance ratio of 72:2100 ohms between windings (1-2) and (3-4) and is intended to operate over the frequency range of 60 to 1500 kHz. Approximate dc resistance of winding (l-2) is 0.34 ohm and of winding (3-4) is 10.9 ohms. Closest recommended mounting centres are 1.812 inches by 3.500 inches. Nuts and lockwashers are furnished for mounting purposes. Intended for use in the NE-225F filter. MARCH 1971 NE-194A REPEATING COIL STANDARD Consists of a toroidal type coil with a permalloy power core potted in a metal case. An electrostatic shield, which is connected internally to the case, is provided between windings (l-2) (3-4) and (5-6). Operates over a frequency range of 79.5 to 88 kHz and has an impedance ratio of 16.25:1 ohms between windings (5-6) and (1-Z) (3-4). Approximate dc resistance of winding (l-2) (3-4) is 1.95 ohms and of winding (5-6) is 1.16 ohms. Closest recommended mounting centres are 1.750 inches by 2.625 inches. Nuts and lockwashers are furnished for mounting purposes. Intended for use in the NE-214A equalizer. MARCH 1971 NE-195A REPEATING COIL STANDARD Consists of one solenoidal and one duolateral winding on a core tube with a permalloy powder core potted in a metal case. Has an impedance ratio of 72:6500 ohms between windings (1-Z) and (3-4) and transmits frequencies over a range of 556 to 808 kHz . Approximate dc resistance of winding (l-2) is 0.18 ohm and of winding (3-4) is 2.0 ohms. Closest recommended mounting centres are 1.688 inches by 2.625 inches. Nuts and lockwashers are furnished for mounting purposes. Intended for use in the NE-225B filter. MARCH 1972 I NE-196 TYPE REPEATING COILS (Card 1) Closest recommended mounting centres are 1.750 inches by 1.750 inches. Nuts and lockwashers are furnished for mounting purposes. NE-196A: Consists of duolateral and solenoidal type windings on a core of insulating material, potted in a rectangular metal case. Intended to operate at 556 kHz, and has an impedance ratio of 72 to 17,400 ohms between windings (l-2) and (3-5). Terminal 4 is the centre tap of winding (3-5). There is an electrostatic shield between the windings. Intended for use in the NE-222B filter. NE-196G & H: Consists of a double-tuned air core coil with duolateral windings, potted in a rectangular metal case arranged for single side stud mounting. SEE RATINGS MARCH 1972 NE-196 TYPE REPEATING COILS BELOW (Card 2) NE-196G: Intended to operate at 520 kHz, and has an impedance ratio of 1:l between windines (l-3) and (4-6). Terminals 2 and 5 are the centre taps of their respective windings. Intended for use in the NE-526E, F, & G filters of the L3 carrier system. NE-196H: Intended to operate at 216 kHz, and has an impedance ratio of 1:l between windings (l-3) and (4-6). Terminals 2 and 5 are the centre taps of their respective windings. Intended for use in the NE-526.l filter of the L3 carrier system. Approximate dc Code Winding Resistance (Ohms) Rating NE-196A (l-2) (a) Standard c(3-5) 12.5 1 3.8 NE-196G (l-3) I, I (4-b) 5.0 I 10 NE-196H (l-3) (4-6) 10 I (a) An internal condenser is connected in series between terminal 2 and the coil winding. DECEMBER 1970 NE-1978 REPEATING COIL STANDARD Permalloy type core potted in a metal case. Has an impedance ratio of 75 to 110 ohms between windings (1-Z) and (3-5). An electrostatic shield is provided between windings (l-2) and (3-5) and the shield is connected internally to the case. Terminal 4 is a centre tap on winding (3-5). Approximate dc resistance of winding (l-2) is 0.11 ohm and of winding (3-5) is 0.09 ohm. Intended to operate over the frequency range of 17 hertz to 6 megahertz. Closest recommended mounting centres are 3.500 inches by 5.250 inches. Intended to transmit video signals and to operate between a 75 ohm unbalanced circuit and a 110 ohm balanced circuit in television systems. OCTOBER 1970 SEE RATINGS NE-201 TYPE REPEATING COILS BELOW I Each consists of windings on a permalloy core, potted in a metal case. Provided with an electrostatic shield between the windings which is connected to terminal S. Terminal 4 is a centre tap on winding (3-5). r-- ‘.‘88---l Closest recommended mounting centres are 1.750 inches by 3.500 inches. NE-2OlA: Has an impedance ratio of 75 to 110 ohms between windings (l-2) and (3-S). Intended for operation over the frequency range of 5 kHz to 10 MHz. Intended for use in the J64061B signal generator for testing television loops in toll telephone systems. ,594 /++38 DIA NE-201B: Has an impedance ratio of 75 to 124 ohms between windings (l-2) and (3-5). Intended for operation over the frequency range of 100 kHz to 4.5 MHz. Intended for use with the J68827A sending console and the 568827B receiving console for testing terminals of the NE-L3 carrier telephone system. Approximate dc Resistance 1.469 (Ohms) of Winding Code (l-2) (3-5) Rating NE-2OlA 0.083 0.083 Standard NE-2OlB 0.10 0.16 I! OCTOBER 1970 NE-204A REPEATING COIL STANDARD Consists of two interconnected toroidal type coils and four capacitors potted in a metal case, and terminated in NE-468B jacks. Each coil has a permalloy core and is provided with an electrostatic shield between the windings. The shields are connected to the case. Intended to operate over the frequency range of 60 kHz to 3200 kHz. Approximate dc resistances between the inner and outer terminals of jacks 1, 2, 3 and 4 are 0.65, 0.65, 0.23 and 0.23 ohm, respectively. Intended to interconnect four 72 ohm circuits connected to jacks 1, 2, 3 and 4. The circuits of jacks 1 and 2 are conjugate to each other and the circuits of jacks 3 and 4 are conjugate to each other. Intended for use as a line hybrid coil in the NE-L type OCTOBER 1970 NE-205A REPEATING COIL STANDARD Consists of a solenoidal air core coil, an inductor and capacitors, potted in a metal case. Intended to operate over the frequency range of 150 to 450 kHz. Has an impedance ratio of 600 to 100 ohms between windings (l-3) and (2-4). Intended to operate from a balanced 600 ohms line in conjunction with external capacitors into a 100 ohm balanced filter. +------e----l Approximate dc resistance of winding (l-3) is 3.4 ohms and of winding (2-4) is 1.4 I (’ z ohms. An electrostatic shield is provided between windings (l-3) and (2-4) and is connected to terminal 5. An impedance correcting network consisting of a series inductance and capacitance is connected between terminals 2 and 6. Closest recommended mounting centres are 1.688 inches by 2.062 inches. Intended for use in the J98701M broad-band coupling unit and the J987OlL terminating subscriber coupling unit for the NE-Ml carrier telephone system. OCTOBER 1970 NE-207A REPEATING COIL STANDARD Shell type coil having a permalloy core. Potted in a cylindrical metal case which provides magnetic shielding. Electrostatic shields, between the windings, are connected to terminal "S". The shields ar‘e insulated from the case. Has an impedance ratio of 600:2 ohms between windings (5-6): (l-2) (3-4) and is intended for operation over the frequency range of 50 to 10,000 hertz. Approximate dc resistance of windings (l-2) and (3-4) with terminal 2 connected to terminal 3, is 0.24 ohm and of winding (5-6) is 70 ohms. Closest recommended mounting centres are 2.938 inches by 2.938 inches Intended for use in the J94002G repeater test set for making transmission measurements of the NE-El telephone repeater. OCTOBER 1970 NE-208A REPEATING COIL STANDARD Shell type coil having a permalloy core and potted in a metal case. Closest recommended mounting centres are 2.00 inches by 1.156 inches. Intended to operate over the frequency range of 200 to 3500 hertz. Has an impedance ratio of 600 to 600 ohms between windings (l-2) (5-6) and (3-4) (7-8). Approx dc Winding Resistance (ohms) (l-2) 33.6 (3-4) 25.5 (5-b) 41.0 (T-8) 50.5 Intended to work out of a varistor network and to be bridged across a balanced line. Forms a part of the 568602 signalling unit. SEE RATINGS OCTOBER 1970 NE-2IOA & NE-211 A REPEATING COILS BELOW Toroidal type coils potted in metal cases. Equipped with flexible terminal leads approximately 10 inches long. 136-32 THD. :X-32 THD Closest recommended mounting centres are 1.094 inches by 1.875 inches. Intended to operate over the voice frequency range. Intended for use in the 5686536 four wire terminating set. NE-210A: Has a permalloy powder core. Has an impedance ratio of 420:600 ohms between windings (red red-white) and (blue blue-white). NE-211A: RED-WHIrE ,m- - ,,2-_zIe< RED-WhlTE '7-.. I& - BC"E -Has a permalloy core. BLUE l3~xu~~wtim CRLLN-WHITL Has an impedance ratio of 600:800 + 400 ohms between windings (red ‘i- -f red-white) and (blue blue-white) + (green green-white). Approximate dc Resistance (ohms) of Windings Code (Red Red-white) (Blue Blue-white) (Green Green-white) Rating NE-210A 56.2 63.2 Standard II NE-ZllA 19.7 20.2 10.8 _- NE-2lOA NE-2llA JANUARY 1965 SEE RATINGS 212AQIA 8 212C REPEATING COILS BELOW Each consists of windings on a permalloy core potted in a metal can. 212AQlA: Intended for operation at 3700 C.P.S. Ras a turns ratio of 1.58: 1 between windings (4-6) and (l-3). Terminal 2 is the center tap of winding (L-3) intended for use in the channel unit of the "Nl" carrier telephone system. 21X: Intended to operate over the frequency range of 200 to 3500 C.P.S. ON 212AOIA ONLY Has an impedance ratio of 600 to 3000 ohms between windings (L-3) and (4-6). A Intended for use through channel units of the N and 0 Carrier Systems, respectively. -I r)- I2 3 7 Approx. D.C. Res. DIM. A (ohms) of Winding Code Dim. A (l-3) (b-6) Replacing Rating - 212AQlA 1 LL/16 70 150 212 A Standard 'ii 212c 1 17132 82 460 II JANUARY 1965 213 TYPE REPEATING COILS CARD 1 130- 32 THREAD Each consists of windings on a pertnalloy powder core potted in a metal can. ,L DEL?7 Closest recamnended mounting centers are l-3132 inches by l-1/4 inches. 213Et Intended to operate over the frequency range of . - 180 to 196 KC between un- balanced channel band filters and a balanced copper oxide modulator. Has an Impedance ratio of 135 to 135 OHMS between windings (l-3) and (4-6). 213Ht Intended to operate over the frequency range of 12.19 to 13.09 MC. Has an impedance ratio of 40 to 400 OHMS between windings (l-3) and (4-6). Provided with an electrostatic shield between the windings. The shield is connected to terminal 5. 2135: Intended to operate over the frequency range of 3.29 to 3.40 MC or 3.81 to 3.91 MC and has an impedance ratio of 40 to 400 OHMS or 75 to 750 OHMS, res- pectively, between windings (l-3) and (4-6) when operating over the above frequency ranges. Prwided with an electrostatic shield between the windings. r rll-l The shield is connected to terminal 7. A 213Kr I-1 Intended to operate wer the frequency range of 195 to 205KC. gas an impedance ratio of 3000 to 153000 OHMS between windings (l-3) and (4-6). 213QlA & 213Q2A: NO.213 TYPE. FOR Intended to operate from a cable pair into a 3000 OHM filter. Also IT!Y”l operates between a balanced modulator and a 3000 OHM filter. NUMBER OF TERMINALS, SEE TABLE SEE RATINGS JANUARY L965 213 TYPE REPEATING COILS BEL,OW CARD 2 213QlA: Intended to operate over the frequency range of 44 to 140KC. Has an impedance ratio of 135 to 3000 OHMS between winding (l-3) and (4-6). Means have been provided for amplas mounting. 21342A: Intended to operate over the frequency range of 164 to 260 KC. Has an impedance ratio of 130 to 3000 OHMS between windings (l-3) and (4-6). Means have been provided for amplas mounting. APPROX. DC RESISTANCE DIM.A (OHMS OF WINDING CODE TERMINALS (INCHES) (l-3) (4-b) REPLACING RATING (a)(c)213E 1 to 6 Incl. I-314 2.2 2.7 Standard (a)213H 1 to 6 Incl. l-314 .06 .15 II (a) CC> Cd) 2135 1 to 8 Incl. I-314 .08 .57 11 (c)(e)213K 1 to 6 Incl. l-314 11 65 II (a)(b)213QlA 1 to 6 Incl. l-25/32 4 75 213C II (a) ‘3) 21392.4 1 to 6 Incl. l-25132 3 47 213D II Terminal 2 is a center tap on winding (l-3) There are no electrical connections to terminal 5. Terminal 5 is a center tap on winding (4-6). :dc; There are no electrical connections to terminal 8. (4 There are no electrical connections to terminal 2.