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REPEATING COILS Bfanufactu?Le 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 <a, 64H 69E 80B 59A (b) 64J 69F aoc 59B 64K 69G 81A 6OA I:; 64L 71A a2A a2c 61A 65A 71B 82B 63A 67B 72A 83A 63B 73B 67D 73B a4A 84B 64A 688 74B :;; a5c w 64B 6BB 74D (9) 85D 64C 68C 75c 75F 85E A 64D 69A 75D a6A 64E 69B 75E 75G g6B ::; 64F 69C 77D 86C (ml (a) Replaced by one 94J Repeating Coil plus two 26B Brackets. (b) Replaced where used at a 4 to 1 ratio by one 94F Repeating Coil plus two 26B Brackets and where used at a 25 to 1 ratio by one 94G Repeating Coil plus two 26B Brackets. (c) Replaced by one 94E Repeating Coil plus two 26B Brackets. (d) Replaced by one 3645 Transformer plus one 109A Adapter. (e) 102A Reccsnmended. (f) 102B Reconrnended. (g) Replaced by one 94H Repeating Coil plus two 26B Brackets and P-12A986 wiring instructions. (h) 62C Recommended. (i) 62E Recomnended. (j) Replaced by one 94E Repeating Coil plus one 114A Adapter. (k) Replaced by one 94E Repeating Coil plus one 114A Adapter and one 11A Resistance Lamp. (m) Replaced by one 94F Repeating Coil plus one 114A Adapter. JAXlARY 1965 REPEATING COILS / Et2zzJ: (File as Card 4 on Re zating Coils) 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 <c> 9911 11SA 125A 93c 93F 1olA ce, 118B 126A rs 93D 103A 119A 12SA 93B 93G 103c 120A 120E 131A 6 94A 94c 104A 120B 120F 132A 94B 94D 105A 12ocs 12oc 135A (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.
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