Tube Number Manufacturer Tube Description Isotope Activity 0A2 Raytheon Co-60 0.2 µCi 0A2WA/6626 Voltage Regulator Ra-226 6 µCi 0.005 0A2WA/6626 Voltage Regulator Ra-226 µCi 0A2WA/6626 CBS Hytron Voltage Regulator Ni-63 0.5 µCi 0A2WA/6626 English Elec. Valve Voltage Regulator U-238 0.1 µCi 0A2WA/6626 Tung-Sol Voltage Regulator Ni-63 Unknown 0A2WA/6626 Raytheon Voltage Regulator Co-60 0.2 µCi 0A3 Sylvania Voltage Regulator Co-60 1.0 µCi 0B2 Raytheon Voltage Regulator Co-60 0.2 µCi 0B2WA/6627 English Elec. Valve Voltage Regulator U-238 0.1 µCi 0B2WA/6627 Raytheon Voltage Regulator Co-60 0.2 µCi 0B2WA/6627 Heintz & Kaufman Voltage Regulator Ra-226 6.0 µCi 0C3 Sylvania Voltage Regulator Co-60 1.0 µCi 0C3W Sylvania Voltage Regulator Co-60 1.0 µCi Unknow 003-2 Amperex Voltage Regulator Unknown n 1B22 Bomac Spark-Gap Modulator Co-60 0.25 µCi 1B22 Western Electric Spark-Gap Radar Modulator Ra-226 Unknown 1B23 Central . Spark-Gap Co-60 1.0 µCi 1B24A Bomac Transmit-Receive Switch Co-60 0.15 µCi 0.475 1B24A General Electric Transmit-Receive Switch Co-60 µCi 1B24A Assoc. Transmit-Receive Switch Co-60 0.5 µCi 1B24A Omni-Wave Transmit-Receive Switch Co-60 0.23 µCi 1B24A Sylvania Transmit-Receive Switch Co-60 1.0 µCi 1B24A Westinghouse Transmit-Receive Switch Ra-226 2.0 µCi 1B24A Metcom Transmit-Receive Switch Co-60 Unknown 1B26 Bomac Transmit-Receive Switch Co-60 0.15 µCi 1B27 Bomac Transmit-Receive Switch Co-60 0.15 µCi 1B35 Westinghouse Anti-Transmit-Receive Switch Ra-226 >4.3 µCi 1B35A Bomac Anti-Transmit-Receive Switch Co-60 0.3 µCi 1B35A General Electric Anti-Transmit-Receive Switch Co-60 0.95 µCi 1B35A Sylvania Anti-Transmit-Receive Switch Co-60 1.0 µCi 1B37A Bomac Anti-Transmit-Receive Switch Co-60 0.3 µCi 1B37A General Electric Anti-Transmit-Receive Switch Co-60 0.95 µCi 1B37A Sylvania Anti-Transmit-Receive Switch Co-60 1.0 µCi 0.475 1B38 Western Electric Pre-Transmit-Receive Switch Co-60 µCi 11339 Bomac Gas Switching Co-60 0.3 µCi 1B41 Bomac Radar Modulator Co-60 0.25 µCi 1B41 Western Electric Spark Gap Radar Modulator Ra-226 1.0 µCi 1B41 Westinghouse Spark-Gap Radar Modulator Ra-226 Unknown 1B42 Machlett Spark-Gap Radar Modulator Ra-226 1.0 µCi 1B44 Bomac Anti-Transmit-Receive Switch Co-60 0.3 µCi 0.475 1B44 General Electric Anti-Transmit-Receive Switch Co-60 µCi 1B44 Sylvania Anti-Transmit-Receive Switch Co-60 1.0 µCi 1B45 Bomac Spark Gap Radar Modulator Co-60 0.25 µCi 1B45 Western Electric Spark Gap Radar Modulator Ra-226 2.0 µCi 1B50 Bomac Transmit-Receive Switch Co-60 0.15 µCi 1B51 Bomac Anti-Transmit-Receive Switch Co-60 0.3 µCi 1B53 Bomac Anti-Transmit-Receive Switch Co-60 .3 µCi 1B54 Bomac Pre-Transmit-Receive Switch Co-60 0.3 µCi 1B55 Bomac Transmit-Receive Switch Co-60 0.4 µCi 1B56 Bomac Anti-Transmit-Receive Switch Co-60 0.3 µCi 0.475 1B56 General Electric Anti-Transmit-Receive Switch Co-60 µCi 1B56 Sylvania Anti-Transmit-Receive Switch Co-60 1.0 µCi 1B58A/6117 Bomac Transmit-Receive Switch Co-60 0.1 µCi 0.475 1B58A/6117 General Electric Transmit-Receive Switch Co-60 µCi 1B58A/6117 Microwave Assoc. Transmit-Receive Switch Co-60 0.5 µCi 1B58A/6117 Sylvania Transmit-Receive Switch Co-60 1.0 µCi Unknow 1B59/R1130B Sylvania Cold- FAX Unknown n 1B60 Bomac Transmit-Receive Switch Co-60 0.15 µCi 1B60 Bomac Transmit-Receive Switch Co-60 0.15 µCi 1B60 Westinghouse Transmit-Receive Switch Ra-226 2.0 µCi 0.7-10 1B63A Microwave Assoc. Fixed Tuned Gas Switchina., Co-60 µCi 1B63A,B Bomac Transmit-Receive Switch Co-60 0.15 µCi 0.475 1B63A,B General Electric Transmit-Receive Switch Co-60 µCi 1B63A,B Microwave Assoc. Transmit-Receive Switch Co-60 0.5 µCi 1B63A,B Sylvania Transmit-Receive Switch Co-60 1.0 µCi 0.002 1C21/5823 Sylvania Cold-Cathode Kr-85 µCi 1Z2 Chatham Th-232 Unknown 3B24WA RCA Radar Transmitting Rectifier Th-232 0.15 µCi 3CX3000 Varian Power Triode Th-232 Unknown 12AT7 Phillips High-mu Dial Triode Re-187 .1 µCi Unknow 12AX7/575I Duotriode Unknown n 290-1343-PI Raytheon Co-60 0.8 µCi 313C Western Electric Double-Gap Cold-Cathode Triode Kr-85 0.5 µCi 313C Western Electric Double-Gap Cold-Cathode Triode Ra-226 0.05 µCi 313CA Western Electric Double-Gap Cold-Cathode Triode Kr-85 0.5 µCi 313CA Western Electric Double-Gap Cold-Cathode Triode Ra-226 0.05 µCi 313CB Western Electric Double-Gap Cold-Cathode Triode Kr-85 Unknown 313CC Western Electric Double-Gap Cold-Cathode Triode Ra-226 0.01 µCi 313CC Western Electric Double-Gap Cold-Cathode Triode Kr-85 0.5 µCi 313D Western Electric Double-Gap Cold-Cathode Triode Kr-85 0.50 µCi 346B Western Electric Cold-Cathode Triode Ra-226 1.0 µCi 346C Western Electric Cold-Cathode Triode Kr-85 4.5 µCi 353A Western Electric Cold-Cathode Triode Kr-85 0.5 µCi 353A Western Electric Cold-Cathode Triode Ra-226 0.01 µCi 357 Bomac Co-60 Unknown 358A Western Electric Cold-Cathode Indicator Kr-85 0.05 µCi 359A Western Electric Cold-Cathode Relay Kr-85 0.5 µCi 359A Western Electric Cold-Cathode Relay Kr-85 0.5 µCi 371B EEC Rectifier Th-232 0.15 µCi 372A Western Electric Cold-Cathode Voltage Regulator Ra-226 Unknown 376A Western Electric Cold-Cathode Voltage Regulator Ra-226 Unknown 376A Westinghouse Kr-85 4.0 µCi 376B Western Electric Cold-Cathode Voltage Regulator Ra-226 1.0 µCi 376C Western Electric Cold-Cathode Voltage Regulator Kr-85 1.2 µCi Unknow 412A AT&T Full-Wave Rectifier Unknown n Unknow 412A Western Electric Full-Wave Rectifier Unknown n 413* Anton C-14 1.0 µCi 413A Western Electric Cold-Cathode Relay Ra-226 1.0 µCi 413B Western Electric Cold-Cathode Relay Kr-85 4.4 µCi 414 Anton C-14 1.0 µCi 421 Anton C-14 1.0 µCi 423A/6140 Western Electric Cold-Cathode Voltage Regulator Ra-226 0.01 µCi 423C Western Electric Cold-Cathode Voltage Regulator Kr-85 4.5 µCi 425A Western Electric Cold-Cathode Relay Kr-85 2.1 µCi 426A Western Electric Cold-Cathode Ringer Kr-85 2.0 µCi 427A/6141 Western Electric Cold-Cathode Kr-85 4.0 µCi 430A Western Electric Cold-Cathode Ra-226 Unknown 430B Western Electric Cold-Cathode Kr-85 4.5 µCi 430C Western Electric Cold-Cathode Kr-85 >15 µCi 432B Western Electric Cold-Cathode Voltage Reference Kr-85 4.5 µCi 439A/6167 Western Electric Gas Discharge Stepping Kr-85 0.5 µCi 446A Western Electric Cold-Cathode Kr-85 0.1 µCi 447A Western Electric Cold-Cathode Indicator Kr-85 0.1 µCi 451A Western Electric Cold-Cathode Relay Kr-85 2.1 µCi 458A Western Electric Voltage Surge Protector Ra-226 1 µCi Unknow 471A General Electric Voltage Surge Protector Unknown n 475 Anton C-14 1.0 µCi 476 Anton C-14 1.0 µCi 721B Bomac Double-Gap Gas Switch Co-60 0.15 µCi 724B Bomac Transmit-Receive Switch Co-60 0.15 µCi 809 RCA Transmitting Triode Th-232 0.15 µCi Unknow 1960/30Z RCA Gas Switching Unknown n 5027 Ra-226 0.26 µCi 0.005 5651WA/STV85 Neon Voltage Reference Ra-226 µCi 5651WAYSTV85 Raytheon Neon Voltage Reference Co-60 0.2 µCi 5682 Machlett Transmitting Triode Th-232 0.13 µCi Unknow 5751/12AX7 Duotriode Unknown n 5783WA/M8190/85A Raytheon Voltage Reference Co-60 0.2 µCi 3 5787 Raytheon Voltage Regulator Co-60 0.2 µCi 5787WA Raytheon Voltage Regulator Co-60 0.2 µCi 5787WB Raytheon Voltage Regulator Co-60 0.2 µCi 5790/X7108 Sylvania Transmit-Receive Switch Co-60 1.0 µCi 5791/Z6007 Sylvania Anti-Transmit-Receive Switch Co-60 1.0 µCi 5792/ATR345 Bomac Anti-Transmit-Receive Switch Co-60 0.3 µCi 5792/ATR345 Sylvania Anti-Transmit-Receive Switch Co-60 1.0 µCi 5793/ATR346 Bomac Anti-Transmit-Receive Switch Co-60 0.3 µCi 5793/ATR346 Sylvania Anti-Transmit-Receive Switch Co-60 1.0 µCi 0.002 5823/1C21 Sylvania Cold-Cathode Triode Relay Kr-85 µCi 5853/1C21 Bomac Transmit-Receive Switch Co-60 0.3 µCi 5853/TR368 Bomac Transmit-Receive Switch Co-60 0.3 µCi 5853/TR368 Bomac Transmit-Receive Switch Co-60 0.4 µCi 5853/TR368 Microwave Assoc. Transmit-Receive Switch Co-60 0.5 µCi 5853/TR368 Sylvania Transmit-Receive Switch Co-60 1.0 µCi 5863/X7109 Bomac Transmit-Receive Switch Co-60 0.15 µCi 5863/X7109 Sylvania Transmit-Receive Switch Co-60 1.0 µCi 5864/ATR321 Bomac Anti-Transmit-Receive Switch Co-60 0.3 µCi 5864/ATR321 Sylvania Anti-Transmit-Receive Switch Co-60 1.0 µCi 5865/TR361 Bomac Transmit-Receive Switch Co-60 0.15 µCi 5865/TR361 Sylvania Transmit-Receive Switch Co-60 1.0 µCi 5883 Litton Anti-Transmit-Receive Switch Co-60 1.0 µCi 5921 Bomac Anti-Transmit-Receive Switch Co-60 0.3 µCi 5922 Bomac Anti-Transmit-Receive Switch Co-60 0.3 µCi 5927 Bomac Transmit-Receive Switch Co-60 0.4 µCi 5939 Westinghouse Pre-Transmit-Receive Switch Ra-226 3.3 µCi 5939A Bomac Pre-Transmit-Receive Switch Co-60 0.3 µCi 5939A Pre-Transmit-Receive Switch Ra-226 3.3 µCi 5962 Voltage Regulator C-14 10.0 µCi 5962/8S- Anton Voltage Regulator C-14 1.0 µCi 101/C1K1017 5962/BS-101/CK1017 Electronic Products Voltage Regulator Ni-63 3.0 µCi 6022/ATR332 Bomac Anti-Transmit-Receive Switch Co-60 0.3 µCi 6024/ATR387A Bomac Anti-Transmit-Receive Switch Co-60 0.3 µCi 6035 Bomac Transmit-Receive Switch Co-60 0.15 µCi 6081/ATR407 Bomac Anti-Transmit-Receive Switch Co-60 0.3 µCi 6081/ATR407 Sylvania Anti-Transmit-Receive Switch Co-60 1.0 µCi 6083/AX9909 Bomac Transmitting Co-60 0.3 µCi 6117/1B58 Bomac Transmit-Receive Switch Co-60 0.4 µCi 0.475 6117/1B58 General Electric Transmit-Receive Switch Co-60 µCi

6117/1B58 Microwave Assoc. Transmit-Receive Switch Co-60 0.5 µCi 6117/1B58 Sylvania Transmit-Receive Switch Co-60 1.0 µCi 6140/423A Western Electric Cold-Cathode Voltage Reference Kr-85 4.5 µCi 6141/427A Western Electric Cold-Cathode Voltage Regulator Kr-85 4 µCi Unknow Unknown 6141/427A Westinghouse Voltage Regulator n 6162 Varian Anti-Transmit-Receive Switch Co-60 0.7 µCi 6162/ATR383 Bomac Anti-Transmit-Receive Switch Co-60 0.3 µCi 6163/ATR428 Bomac Anti-Transmit-Receive Switch Co-60 0.30 µCi 6163/ATR428 Microwave Assoc. Anti-Transmit-Receive Switch Co-60 0.25 µCi 6164/TR429 Bomac Transmit-Receive Switch Co-60 0.15 µCi 6167/439A Western Electric Gas Discharge Stepping Kr-85 0.5 µCi 6213/VXR130 Raytheon Voltage Regulator Co-60 0.2 µCi 6232/TR437 Bomac Transmit-Receive Switch Co-60 0.15 µCi 6232/TR437 Central Electric Transmit-Receive Switch Co-60 1.0 µCi 6232/TR437 Sylvania Transmit-Receive Switch Co-60 0.15 µCi 6232/MA-316 Microwave Assoc. Transmit-Receive Switch Co-60 0.5 µCi 6249A/QK349 Raytheon Magnetron Co-60 0.16 µCi 6260 Westinghouse Anti-Transmit-Receive Switch Ra-226 2.0 µCi 6322/BL-25 Transmit-Receive Switch Co-60 1.15 µCi 6334/BL-27 Central Electric Transmit-Receive Switch Co-60 1.0 µCi 6334/BL-27 Microwave Assoc. Transmit-Receive Switch Co-60 0.25 µCi 6334/BL-27 Sylvania Transmit-Receive Switch Co-60 1.0 µCi 6359 Gas Noise Source Ra-226 0.06 µCi 6376,A Fission Counter U-235 95 µCi 6378/BL-62 Bomac Transmit-Receive Switch Co-60 0.15 µCi 6396/BL-650 Bomac Anti-Transmit-Receive Switch Co-60 0.3 µCi 6396/BL-650 Sylvania Anti-Transmit-Receive Switch Co-60 1.0 µCi 6542/CK1045 Voltage Regulator Ra-226 0.05 µCi 6542/CK1045 Raytheon Voltage Regulator Co-60 0.20 µCi 6545 Bomac Transmit-Receive Switch Co-60 0.15 µCi 6560/BL-35 Bomac Transmit-Receive Switch Co-60 0.25 µCi 6560/NIA-375A Microwave Assoc. Transmit-Receive Switch Co-60 0.4 µCi 65641BL-71 Bomac Dual Transmit-Receive Switch Co-60 0.25 µCi 65681BL-28 Bomac Transmit-Receive Switch Co-60 0.15 µCi Unknow 6627/0B2WA RETMA Voltage Regulator Unknown n 6628/BL-38 Ra-226 0.55 µCi 6633/BL-37A Bomac Transmit-Receive Switch Co-60 0.7 µCi 6637/BL-31 Bomac Transmit-Receive Switch Co-60 0.15 µCi 6639/BL-46 Bomac Transmit-Receive Switch Co-60 0.15 µCi 6640BL-60 Bomac Dual Transmit-Receive Switch Co-60 0.25 µCi 6641/BL-95 Bomac 'Transmit-Receive Switch Co-60 0.15 µCi 6890/BL-650 Bomac Anti-Transmit-Receive Switch Co-60 0.3 µCi 6941,A Neutron Counter U-235 23 µCi 6962/BL-665 Bomac Co-60 0.6 µCi 6962/MA-339 Microwave Assoc. Transmit-Receive Switch Co-60 0.4 µCi 6971,A Fission Counter U-235 21 µCi 0.003 7099 Voltage Regulator Ra-226 µCi 7166 Microwave Assoc. Microwave Reference Cavity Co-60 <1.0 µCi 7166/BL-933 Bomac Microwave Reference Cavity Co-60 0.7 µCi 7166/MA-336 Microwave Assoc. Transmit-Receive Switch Co-60 0.4 µCi 7186,7187,7188 Fission Counter U-235 47 µCi 7381 Bomac Dual Transmit-Receive Switch Co-60 0.25 µCi 7381NA-338A Microwave Assoc. Transmit-Receive Switch Co-60 0.4 µCi 7615/EP680 Electronic Products Ni-63 3.0 µCi 7615 Victoreen Ni-63 Unknown 7617 Co-60 1.5 µCi 7657 Counter Tube U-235 95 µCi 7988/TD-44 Gas Noise Source Ra-226 0.06 µCi 8059/TD-72 Gas Noise Source Ra-226 0.06 µCi 8073 Counter Tube U-235 95 µCi 8152/TD-40 Signalite Gas Noise Source Ra-226 0.06 µCi 8311/MDS56 H-3 3 mCi 8481 Omni-Wave Co-60 1.15 µCi B-107A Ra-226 1 µCi BL-25/6322 Transmit-Receive Switch Co-60 1.15 µCi BL-26 Bomac Co-60 Unknown BL-27/6334 Central Electric Transmit-Receive Switch Co-60 1.0 µCi BL-27/6334 Microwave Assoc. Transmit-Receive Switch Co-60 0.25 µCi BL-27/6334 Sylvania Transmit-Receive Switch Co-60 1.0 µCi BL-28/6568 Bomac Transmit-Receive Switch Co-60 0.15 µCi BL-31/6637 Bomac Transmit-Receive Switch Co-60 0.15 µCi BL-35/6560 Bomac Transmit-Receive Switch Co-60 0.25 µCi BL-37A/6633 Bomac Transmit-Receive Switch Co-60 0.7 µCi BL-38/6628 Ra-226 0.55 µCi BL-46/6639 Bomac Transmit-Receive Switch Co-60 0.15 µCi BL-60/6640 Bomac Dual Transmit-Receive Switch Co-60 0.25 µCi BL-62/6378 Bomac Transmit-Receive Switch Co-60 0.15 µCi BL-71/6564 Bomac Dual Transmit-Receive Switch Co-60 0.25 µCi BL-95/6641 Bomac Transmit-Receive Switch Co-60 0.15 µCi BL-350 Bomac Co-60 0.15 µCi BL-357 Bomac Co-60 0.7 µCi BL-362 Bomac Co-60 0.25 µCi BL-601 Bomac Co-60 Unknown BL-622 Bomac Co-60 0.3 µCi BL-650/6890 Bomac Anti-Transmit-Receive Switch Co-60 0.3 µCi BL-650/6396 Sylvania Anti-Transmit-Receive Switch Co-60 1.0 µCi BL-652 Bomac Co-60 0.8 µCi BL-665/6962 Bomac Co-60 0.6 µCi BL-693 Bomac Co-60 0.3 µCi BL-735 Bomac Co-60 0.25 µCi BL-933/7166 Bomac Microwave Reference Cavity Co-60 0.7 µCi BS110 English Elec. Valve Transmit-Receive Switch H-3 150 µCi BS172 English Elec. Valve Pre-Transmit-Receive Switch H-3 150 µCi BS260 English Elec. Valve Transmit-Receive Limiter H-3 150 µCi BS800 English Elec. Valve Transmit-Receive Switch H-3 150 µCi BS824 English Elec. Valve Pre-Transmit-Receive Switch H-3 150 µCi BS832 English Elec. Valve Pre-Transmit-Receive Switch H-3 150 µCi BS834 English Elec. Valve Transmit-Receive Switch H-3 150 µCi BS838 English Elec. Valve Pre-Transmit-Receive Switch H-3 150 µCi BS856 English Elec. Valve Pre-Transmit-Receive Switch H-3 150 µCi BS870 English Elec. Valve Transmit-Receive Switch H-3 150 µCi BS894 English Elec. Valve Transmit-Receive Switch H-3 150 µCi <1500 BS977 English Elec. Valve Transmit-Receive Limiter H-3 µCi BS4111 English Elec. Valve Transmit-Receive Limiter H-3 150 µCi BTR-692 Varian Pm-147 <30 µCi CG2-230L C.P. Clare Gas Discharge Surge Arrester Ni-63 0.8 µCi Unknow GL-6942 General Electric Unknown n GVIA Victoreen Corona Voltage Regulator Ni-63 <5 µCi GV3A-1800 Victoreen Corona Voltage Regulator Ni-63 1.0 µCi GV3A-950 Victoreen Corona Voltage Regulator Ni-63 1.0 µCi GV3A-950 Victoreen Corona Voltage Regulator Ni-63 1.0 µCi GV3S Victoreen Corona Voltage Regulator Ni-63 <5 µCi GV4S Victoreen Corona Voltage Regulator Ni-63 <5 µCi GV5A-1600 Victoreen Corona Voltage Regulator Ni-63 0.1 µCi GV5A-2000 Victoreen Corona Voltage Regulator Ni-63 1.0 µCi GV5C-300 Victoreen Corona Voltage Regulator Ni-63 1.0 µCi GV5C-4000 Victoreen Corona Voltage Regulator Ni-63 1.0 µCi GV8A-1200 Victoreen Corona Voltage Regulator Ni-63 0.1 µCi GV9A-900 Victoreen Corona Voltage Regulator Ni-63 0.4 µCi KN-11B EG&G Sprytron Trigger Ni-63 <4 µCi KN-2 EG&G Krytron Trigger Ni-63 <4 µCi KN-22 EG&G Krytron Trigger Ni-63 <4 µCi KN-25 EG&G Sprytron Trigger Ni-63 <4 µCi KN-6 EG&G Krytron Trigger Ni-63 <4 µCi KX-642 Westinghouse Voltage Arrester Ra-226 Unknown KX-642 Westinghouse Voltage Arrester Kr-85 Unknown M42C-9 Victoreen Corotron Ni-63 Unknown MA-306 Microwave Assoc. Transmit-Receive Switch Co-60 1.0 µCi MA-316/6232 Microwave Assoc. Transmit-Receive Switch Co-60 0.5 µCi MA-324 Microwave Assoc. Transmit-Receive Switch Co-60 0.4 µCi MA-331A,B Microwave Assoc. Transmit-Receive Switch Co-60 0.4 µCi MA-336/7166 Microwave Assoc. Transmit-Receive Switch Co-60 0.4 µCi MA-337A Microwave Assoc. Transmit-Receive Switch Kr-85 50 µCi MA-337A,B,C,D Microwave Assoc. Transmit-Receive Switch Co-60 0.4 µCi MA-338A/7381 Microwave Assoc. Transmit-Receive Switch Co-60 0.4 µCi MA-339/6962 Microwave Assoc. Transmit-Receive Switch Co-60 0.4 µCi MA-351, A,B,C,D,E Microwave Assoc. Transmit-Receive Switch Co-60 0.4 µCi MA-356, A,B,C,D,E Microwave Assoc. Transmit-Receive Switch Co-60 0.4 µCi MA-362, A,B,C,D,E Microwave Assoc. Transmit-Receive Switch Co-60 0.4 µCi MA-372 Microwave Assoc. Transmit-Receive Switch Co-60 0.4 µCi MA-378, A,B,C,D Microwave Assoc. Transmit-Receive Switch Co-60 0.4 µCi MA-3859X Microwave Assoc. Transmit-Receive Switch H-3 50 mCi MA-3959Z Microwave Assoc. Transmit-Receive Switch H-3 50 mCi MA-3899Z Microwave Assoc. Transmit-Receive Switch H-3 50 mCi MA-3976C Microwave Assoc. Transmit-Receive Switch H-3 50 mCi MA-3993XS Microwave Assoc. Transmit-Receive Switch H-3 12.5 Ci < 150 MA-32145 Microwave Assoc. Microwave Reference Cavity H-3 mCi Micro-Dynamics, MD-80C17/32187 TR Limiter H-3 Unknown Inc. MPT-47 Omni-Wave Kr-85 25 µCi MPT-248061 Omni-Wave Kr-85 25 µCi OML-1003 Omni-Wave Anti-Transmit-Receive Switch Kr-85 50 µCi QK-327 Raytheon Th-232 0.17 µCi QK-338A Raytheon Magnetron Th-232 0.17 µCi Unknow R-1131C Sylvania Crater Lamp Unknown n Unknow R-1131C Westinghouse Crater Lamp Unknown n TD-9A/6142 Bendix Gas Diode Voltage Regulator Ra-226 0.03 µCi TD-19 Bendix Gas Diode Voltage Regulator Ra-226 0.03 µCi TD-38 Bendix Ra-226 0.6 µCi TD-39 Bendix Ra-226 0.6 µCi TD-40/8152 Bendix Gas Noise Source Ra-226 0.06 µCi TD-40/8152 Signalite Gas Noise Source Ra-226 0.06 µCi TD-41 Bendix Ra-226 0.6 µCi TD-42 Bendix Ra-226 0.6 µCi TD-43 Bendix Ra-226 0.6 µCi TD-44/7988 Bendix Gas Noise Source Ra-226 0.06 µCi TD-49 Bendix Ra-226 0.6 µCi TD-51 Bendix Ra-226 0.6 µCi TD-52 Bendix Ra-226 0.06 µCi TD-53 Bendix Ra-226 0.06 µCi TD-55 Bendix Ra-226 0.06 µCi TD-56 Bendix Ra-226 0.06 µCi TD-58 Bendix Ra-226 0.06 µCi TD-61/5787 Bendix Voltage Regulator Ra-226 0.06 µCi TD-63 Bendix Ra-226 0.06 µCi TD-64 Bendix Ra-226 0.06 µCi TD-65 Bendix Ra-226 0.03 µCi TD-66 Bendix Ra-226 0.06 µCi TD-67 Bendix Ra-226 0.06 µCi TD-68/6542 Bendix Voltage Regulator Ra-226 0.03 µCi TD-69 Bendix Ra-226 0.06 µCi

TD-72/8059 Bendix Microwave Noise Source Ra-226 0.06 µCi TD-74 Bendix Ra-226 0.06 µCi TD-78 Bendix Ra-226 0.06 µCi TD-81 Bendix Ra-226 0.06 µCi TN-5 Bendix Ra-226 0.06 µCi TN-6 Bendix Ra-226 0.06 µCi TN-7 Bendix Ra-226 0.06 µCi TN-8 Bendix Ra-226 0.06 µCi TN-9 Bendix Ra-226 0.06 µCi TN-11 Bendix Ra-226 0.06 µCi TN-12 Bendix Ra-226 0.06 µCi TN-13 Bendix Ra-226 0.06 µCi 3.0-5.0 TG-19 Spark-Gap Cs-137 µCi Unknow TG-25 Bendix 400V Overvoltage Spark-Gap Unknown n Unknow TG-26 Bendix 750V Overvoltage Spark-Gap Unknown n Unknow TG-27 Bendix 1.0 kV Overvoltage Spark-Gap Unknown n Unknow TG-30 Bendix 2.0 kV Overvoltage Spark-Gap Unknown n Unknow TG-34 Bendix 5.0 kV Overvoltage Spark-Gap Unknown n Unknow TG-37 Bendix 10.0 kV Overvoltage Spark-Gap Unknown n TG-39 CP Clare 2 Spark-Gap Tube Cs-137 < 1 µCi TG-44 Electrical Surge Arrester Cs-137 0.9 µCi TG-53 Signalite Overvoltage Spark-Gap Cs-137 < 5 µCi TG-53 Electrical Surge Arrester Cs-137 0.9 µCi TG-56 Bendix 20.0 kV Electrical Surge Arrester Cs-137 1 - 2 µCi TG-57 Spark-Gap Cs-137 1 - 2 µCi Unknow TG-60 Bendix 50 kV Overvoltage Spark-Gap Unknown n Unknow TG-67 Bendix Spark-Gap 2.0 µCi n TG-100 CP Clare 2 Electrode Spark-Gap Tube Cs-137 < 1 µCi TG-160 CP Clare 2 Electrode Spark-Gap Tube Cs-137 <5 µCi TG-167 Signalite Overvoltage Spark-Gap Cs-137 0.4 µCi VDC-1025 Pm-147 30 µCi VDC-1029 H-3 35 µCi VDK-1000A Pm-147 30 µCi VDS-1011 Pm-147 70 µCi VDS-1020 H-3 35 µCi VDS-1032 H-3 35 µCi VDV-1118 Transmit-Receive Switch H-3 30 mCi VDX-1001A H-3 35 µCi VDX-10I5 H-3 35 µCi VDX-1017,E Pm-147 30 µCi VDX-1031 Pm-147 30 µCi VDX-1033 Pm-147 30 µCi VDX-1035 H-3 35 µCi VFX-9517 Surge Arrester Pm-147 30 µCi VFX-9517 Surge Arrester Co-60 1 µCi WD-160 Pm-147 10 µCi WD-160 H-3 45 µCi WD-191 Pm-147 10 µCi WD-191 H-3 45 µCi WL-759 Westinghouse Relay Kr-85 0.2 µCi XD-708 Ra-226 0.06 µCi XD-751 Ra-226 0.06 µCi XN-757 Ra-226 0.06 µCi XD-764 Ra-226 0.06 µCi XD-765 Ra-226 0.06 µCi XD-860 Ra-226 500 µCi XD-972 Ra-226 0.06 µCi Unknow Z-1783 General Electric Unknown n 122P224 Burroughs Nixie Numeric Display Unknow Unknown n