TMC Kits

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Below is a list of all of the KIT's offered to TMC to update and correct defects in various products.  

KIT No. Equipment Description Specification Document
101 SBT-1KQ Interconnect Cable Kit, ID-242
102 RFD Meter circuit modification.  Feed-through capacitor modification kit.
103 GPT-10K/40K Resistor board and feed-through capacitor mod kit S-552
104 GPT-40K Blower mod (TMC BL-110)  ID 268 S-639
105 GPT-10K/40K 10K field equipment modification S-595
106 GPT-10K/40K modification kit S-1107
108 GPT-750 time delay and circuit breaker change.  Serial no's 929 and before require this modification. S-929
109 CHG-1 ALDC modification kit S-579, S-562
110 SBE-3 ALDC modification kit S-594
111 GPT-10K/40K ALDC (unsynthesized) modification kit. S-591
112 GPT-10K/40K ALDC (synthesized) modification kit. S-592
113 GPT-10K Modification kit, VSWR indicator instead of antenna current.  ID 266  Obsolete S-638
114 Fly-away Transient Receiver Relay Kit S-602
115 SBE-2 ALDC mod kit S-601
116 GPT-40K Capacitor discharge kit. S-610
117 Converts PTE-1 to PTE-3
118 GPT-10K AN/FRT-39 2-28Mc modification ID 276 S-661
119 AN/FRT-40 2 Mc modification kit ID 274, S-669, S-655?
120 AN/FRT-40/-40A 2 Mc modification kit S-655
121 AN/FRT-39 Zener board modification kit S-629
122 AN/FRT-39 Emergency 1Kw output S-945
123 AN/FRT-40 Emergency 1Kw output S-944
124 XKF FAX mod kit
125 GPT-40K C911 replacement kit ID 271 S-652
126 AN/FRT-40 VSWR  ID 279 S-670, S-666
127 GPT-10K/40K Shorting relay capacitor kit S-613
128 GPT-10K/40K Sythesizer mod kit, converts unsynthesized 10K and 40K transmitters to synthesized operation  ID 277 S-666
128-1 Synthesizer conversion, CK 925, A 4473
129 GPT-10K VSWR mod kit for 10K portion of AN/FRT-40
130 RFD-1 ALDC modification S-817
131 GPT-40K PA bandswitch mod  ID 275 S-656
132 SBT-1K-E1 interconnect cable kit  ID-269
133 SBT-1K Converts SBT-1K-Q  to SBT-1K-C
134 SBT-1K Converts SBT-1K-Q to SBT-1K-A
135 SBT-1K Converts SBT-1K-Q to SBT-1K-L
136 PSP-350 modification of PSP-350 S-663
137 Installation details, jack switch assy, ID-278
138 Installation details,jack switch asy, QDP
139 GPT-10K-L Low line voltage contactor corrector S-708
140 RSC Installation instruction S-382
141 ATS Installation instruction S-447, S-394
142 GPT-750 SBE drawer mod kit, XFK drawer mod kit S-453
143 Converts RSC-2 to RSC-3 S-395
144 XFK Installation instructions S-457
145 Converts RSM-2 to RSM-3 S-398
146 Converts RSP-2 to RSP-3 S-399
147 Converts RSD-2 to RSD-3 S-380
148 GPT-750( )-1 VMO mod kit for standby operation of VMO S-454, S-380
149 GPT-750 Upper blower mod kit S-451
150 GPT-750 Lower blower mod kit S-452
151 FFR AVC/BFO mod kit S-407
152 Converts AN/URA-24/25 to AN/URA-27/28. S-394
153 RTC Converts RTC for use with carbon mic.  Replaces kit calledout in SYM-1029.  See instruction manual.
154 Converts AN/FRT-39D to AN/FRT39C by addition of Robinson Shock mounts.  Refer to AX-346 and ID-272
155 CHG, CBE Mod kit for voice and push-to-talk conversion.  CK-606, ID-286 S-984
156 TIS-3 Mod kit to Kit 128 to add TIS-3 to all transmitters. S-796
156-1 S-1119
156A APP-8 in lieu of APP-3, CSS-1B in lieu of CSS-1A, CHG-2A in lieu of CHG-2.  See Kit 156-1 S-1119
157 PSP-350 Time delay and control relay S-746
158 GPT-750( )-1 Interlock circuit S-436
159 SBC-1 Oven circuits
160 GPT-20K VSWR meter mod kit
161 GPT-10K VSWR meter mod kit, adds Bird coupler, SWCU-1, VSWR meter, and VSWR overload relay to GPT-10K S-926
161B S-1309
162 TTR-10/40 Cabinet shock mount for vehicular installation
163 TTR-10/40 Slide mounting for rack servicing
164 Obsolete, CAB-9 makes this kit obsolete.
165 Rechargeable battery supply for VLFC, VLR, LFS, CSS
166 FFR Crystal filter kit  CK 727 (obsolete) S-496
167 GPT-10K Relieve load on regulating transformer in aux frame
168 Convert GPT-40K as driver for GPT-200K
169 Converts GPT-40K to a GPT-10K transmitter
170 DDR-5 Alignment kit S-804
171 SBG-1 SBG-1 with a TIS-3 and CSS-2 (instead of CSS-1A) for use with GPT-10K, 40K, and 200K
172 GPT-40K PA output circuitry mod S-832
173 GPT-10K/40K Exciter rack mod
174 DDR-5 Phase jitter mod kit
175 MSR-5 Mod for 550 (500?) Kc input S-734, S-821
176 Conversion of GPR-90RXD to GPR-91RXD S-776A
177 GPT-10K Vapor cooling mod kit
178 GPT-10K/40K Vapor cooling mod kit for GPT-10K when used as a driver for GPT-40K
179 PAL-40K Vapor cooling kit.
180 GPT-40K Vapor cooling kit S-1077
181 AP-120 to replace AX-103.  Solid state HV power supply for 10Kw linear amp.  See Kit 257
182 AP-121 to replace AP-105.  Solid state HV power supply for 40Kw linear amp.  See Kit 258
183 AP-122 to replace AP-110.  Solid state HV power supply for 100 and 200 Kw  linear amp.  See Kit 326
184 HFR-1 Thermostat mod S-830
185 RAC Spark gap mod.  Change mechanical spark gap to electrical S-831
186 RFD-1A PA and loading capacitor to improve power output level stability S-1095
187 GPT-10K (RFC) IPA loading capacitor mod to improve power output level stability S-955
188 DDR-5B Shipboard shock mount kit
189 DDR-5 USB vestigial sideband filter, -350 to 3500 cps (with reference to 250Kc carrier at 3dB points)  FX-202
190 DDR-5 USB vestigial sideband filter, -350 to 4500 cps (with reference to 250Kc carrier at 3dB points)  FX-203
191 DDR-5 USB vestigial sideband filter, -350 to 6000 cps (with reference to 250Kc carrier at 3dB points)  FX-204
192 DDR-5 LSB vestigial sideband filter, -350 to 3500 cps (with reference to 250Kc carrier at 3dB points)  FX-205
193 DDR-5 LSB vestigial sideband filter, -350 to 4500 cps (with reference to 250Kc carrier at 3dB points)  FX-206
194 DDR-5 LSB vestigial sideband filter, -350 to 6000 cps (with reference to 250Kc carrier at 3dB points)  FX-207
195 SBG-1 Shipboard shock mounts.  Kit used for SBG-1 synthesizer when used as part of SBT-1K transmitter
195A Shipboard shock mounts.  Kit used for SBG-1 synthesizer when used as part of SBT-1K transmitter
196 Shipboard shock mount kit for 1Kw linear amplifier cabinet of SBT-1K, E, F, G, H transmitters
197 One each of KIT-195, KIT-196 for SBT-1K,E,F,G,H (shock mounting)
198 Kit for TLAA-1, 10Kw linear amplifier.  See TB-2033
200 Add 208V to 115V stepdown 1.5Kw transformer and breaker in the exciter rack of AN/FRT-39/40/62 to provide power to utility outlets.   S-927
201 Provides phase locking capability of frequency standards in GPT-10K/40K/200K and SBT-1K transmitters
202 DDR-5 Provides phase locking capability of frequency standards in DDR-5 receivers
203 MSR-8 Mod to accept 455Kc input.   Refer to PC-733, Pacific region letter, FAA S-860
204 GPT-10K Mod to remove regulating and stepdown transformer from exciter fram and provide separate 115 volt, single-phase input to exciter frame and utility outlets:  Note: this modification does not affect the 230V 3-phase input to the IPA and final stages.s S-928
205 GPT-40K Modified power input provides separate input as follows:
A.  115 V, single-phase power to exciter frame.  Each leg of the 115V line to the utility outlets to be fused with 15 A fuses.
B.  230 V, 3-ph input to 10Kw section
C. 230 V, 3-ph input to 40Kw section
206 GPT-200K
Modified power input provides separate input as follows:
 
A.  115 V, single-phase power to exciter frame.  Each leg of the 115V line to the utility outlets to be fused with 15 A fuses.
B.  230 V, 3-ph input to 10Kw section
C. 230 V, 3-ph input to 40Kw section
D. 230V power for blower filaments bias and supply of 200Kw section
E.  4160V, 3-ph input to 200Kw high power supply section
S-938
207 STR-1 Mod to permit remote control of clarifier. Controllable variation to be 0.01% of operating frequency.  Control to be affected by variation of DC voltage on a VARICAP.  Remote control of the DC voltage to be exercised from a distance of up to 2 miles.
208 Technimatic tuning kit for 10Kw transmitter, AN/FRT-39A, B, D, and E. Kit includes new exciter frame components, new IPA and new final components and/or drawers
209 External control device series for remoted transmitters as required.  The first system will be 209A, the next 209B, etc., depending upon customer requirements.
209A GPT-10K final automatic
209B
210 Similar to KIT-208, but uses SME in place of SBG-3 components
211 Technimatic tuning kit covering exciter frame, IPA driver and final, GPT-40K
212 External control device for remoted receivers as required.  The first system will be 212A, the next 212B, and so forth, depending on customer requirements.
212A Kit for Technimatic tuning of DDR-5B, S.O. G 22404, RTPA-1, RTIA-1, RTMU-1, RTTD-1, RTKY-1, including antenna switching, recorder selector switching assembly precision tuning device.
213 GPT-10K/40K RF suppressor for plate and grid RF meters.
214 GPT-10K Update GPT-10K-R5 to GPT-10K-R7 so that finished transmitter is same as GPT-40KE4.  S.O. #N22615
215 SBG-( ) Mod of sideband generator to provide automatic switchover from external freq standard to internal freq standard if station standard fails.  CK-913 S-921
215A Switch from internal to external standard S-1192, S-1195, CK-1385
216 CSS-1 Converts CSS-1B to CSS-1C.  Mod kit to modify DDR-5A receivers to provide automatic switching to internal frequency standard input, complete with two commercial type of technical manuals per equipment. S-922
217 TIS-3 CW keying mod, adds an RC filter. S-875
218 DDR-5 Converts DDR-5A to DDR-5C by removing one DVM-4 and adding one HFS-1. S-905
218-2 Converts DDR-5L to DDR-5M by adding one HFS
220 HFS-1 Remote-control kit.  Adds ledex motor(s) to HFS-1 so that it can be remote controlled.  Creates HFSR-1. S-988
221 HFI-1 Converts HFI-1 to HFIR-1 by adding ledex motor(s) so that it can be remote controlled (AFC and GAIN controls). S-991
222 HFA-1 Converts HFA-1 to HFAR-1 by adding ledex motor(s) so that it can be remote controlled. S-992
222A Same as 222 but controls both mode selectors simultaneously. S-1014
223 HAF-1 Converts HAF-1 to HAFR-1 by adding ledex motor(s) so that it can be remote controlled (HI CUTOFF and LO CUTOFF, both channels). S-993
224 Field mod for installing KMCU-1 in place of TIS-3 in GPT-10K synthesized transmitters S-924
224S Provides final mod for KMCU in 17 VLF PAC transmitters.  2/11/66.  L 3002.  Should include KMCU-1 IN 4028K
225 GPT-40K Adds Bird Thru-Line Coupler, VSWR meter, VSWR overload circuits, SWCU, to 10Kw power amplifier in GPT-40K S-929
226 Mod of squelch circuit on 600-ohm audio of STR-1, SMR-1, TTR-10, STR-2, STR-3, STR-4. S-912
227 GPT-10K Adapter kit 1-3/8" to 3-1/8" EIA flange
228 Antenna installation kit.  
Two 6' ground rods with connectors
500' of $10 aluminum ground rod
150' RG-58 coax with connector each end
150' antenna control cable with connector each end
Water pipe ground clamp
50' #14 insulated copper ground wire
2 spare connectors for transmission line
Installation instructions
229 SBS-1A RF input mod.  Modify RF (IF) input to SBS-1A so that selection of one of two receivers can be made by a switch on the front panel of the SBS-1A S-919
230 Converts RAK-21-B to RAK-21-C by adding hardware to accept ARCD-1 units.  RAK-21-C and units together form ARCD-1
231 Converts HFI-1 to HFIB-1 by adding ledex motor to bandwidth controls only of HFI-1.   S-995
232 Converts PAL-350 and PAL-350A to PAL-350B.
  1. Provides mode selection switch that disables RF feedback and ALDC in RFA for Class C operation.  New name:  RFA-1B
  2. PSP changed to include solid-state rectifier, regulators, and regulation for RFA-1B.  New name: PSP-350B
  3. All components with history of high failure rate changed or redesigned.
S-948
232A PAL-350 and PAL-350A Improvement Kit.  Add solid-state rectifiers and transiesnt suppressors to PAL-350 and PAL-350A.
232B S-1083
233 Converts HFR-2 to HFRR-2. Remoted controls:  BAND switch, TUNE control S-949
234 Converts AFC-3 to AFCR-3.  Remoted controls: Tuning KCS, RESET button, carrier suppression (eliminates need to operated sensitivity control by adding a 20 dB pad); also provides readback line for tuning, and fade alarm. S-1035
235 Converts HFI-1 to HFIA-1. Remoted controls: IF bandwidth (two channels), manual gain control
236 DDR-5K Shipboard shock mount kit.  Special shock and vibration system available as an accessory for shipboard installations.
237 Converts MSA-1 to MSAA-1.  Remoted controls: Squelch adjust controls, LINE LEVEL controls. S-940
238 Converts MCG-1 to MCGA-1.  Remoted controls: INT/FAC/SYN switch S-974, S-956
239 Converts HRF-1A to HFRR-1A.  Remoted controls:  BAND switch, TUNE control S-1058
240 VLFC Battery life extension mod.  Adds current limiting components to battery power circuit to extend life of batter power supply.  This is included in all VLFC-1 shipped, except for 1 in Greece, per EFM 1/9/67
241 AN/FRT-39 Installation of low-pass filter at unbalanced output.  Output coupling is 1-5/8" EIA flange.
242 AN/FRT-40 Installation of low-pass filter at unbalanced output.  Output coupling is 3-1/8" EIA flange.
243 AN/FRT-62 Installation of low-pass filter at unbalanced output.  Output coupling is 6-1/8" EIA flange.
244 GPT-40K Output bandswitch change, replaces AS-120 bandswitch with AS-125.  Includes new band-change counter, modified tuning charts, instructions, etc. S-968
244A Adds CB Harmonic Rejection to KIT-244 (special cases only)
245 GPT-10K Protective cover kit.  Provides protection for personnel against electrical shock S-1059
246 GPT-40K Protective cover kit.  Provides protection for personnel against electrical shock S-1147
247 GPT-200K Protective cover kit.  Provides protection for personnel against electrical shock S-1150
248 Converts SBE-2 to SBE-2A.  Improved circuits mods including new balanced modulator. S-952
249 Converts HFS-1 to HFSA-1.  Remotes controls 1Mc, 100Kc, 10Kc, 1Kc, 0.1Kc switches. Prepositioning wafers added.
250 Use kit 222A 
251 PAL-1K/1KA Tune/operate mod kit.
252 Converts TTR-10 to TTR-11.  Addition of TPC-1 (four channel selector to TTR-10:  TTR-10 then becomes TTR-12.. Kit 278) S-1000
253 Converts TTR-10 to TTR-12 with addition of TPC-1
254 Substitute card PC220 for PC165 and PC221 for PC125 in RTMU-1, which becomes RTMU-1A.
255 Converts TTR-10 to TTR-13 by adding TTC-1 and TPC-1.
256 Alignment tool kit for LRRA-1 and VLFC-1.  Consists of 1 each TP-110-1, 126, 127, 129.
257 GPT-10K Solid-state conversion of high voltage rectifier drawer.  Replaces vacuum tubes and associated transformers in high voltage rectifier drawer AX-103 with semiconductor rectifiers.  Retains original drawer. S-990
258 GPT-40K Solid-state conversion of high voltage rectifier drawer.  Replaces vacuum tubes and associated transformers in high voltage rectifier drawer AP-105 with semiconductor rectifiers.  Retains original drawer.  Includes KIT 257.
259 GPT-200K Solid-state conversion of high voltage rectifier drawer.  Replaces vacuum tubes and associated transformers in high voltage rectifier drawer AP-110 with semiconductor rectifiers.  Retains original drawer.  2 HVRA-1's and KIT 258.  10/28/65
260 Addition of SBG-3 to AN/FRT-52, AN/FRT-52A, AN/FRT-54, and AN/FRT-54A.  Adds SBG-3 to above transmitters; retains spectrum analyzer.  Components:  CHG-3, HFS-1, CMRA-1, HFP-1, associated cables and mounting hardware  7/8/65
261 PAL-1K Solid-state power supply conversion, replaces vaccum tube rectifiers in PS-4A and PS-5 with plug-in semiconductor rectifiers.  Replaces following tubes:  6X4, 5R4GYB, (2) 872A.  7/12/65 S-1151
262 Converts GPT-40K-EA to GPT-40K-EC.  Consists of 1 set top cover air duct brackets; Base shield incorporating air duct for 1st and 2nd frames; Blank panels to cover existing 1st frame air intakes; New 4th frame right side cover incorporating air duct. S-1078
263 Adds CLD-1 to SBG-1LA to provide 10 cps tuning.
264 Converts SBE-8 to SBE-10 (6 Kc)
265 Converts SBS-1A to SBS-8 (100 Kc) S-1050
266 Converts AFC-2A to AFC-8 (100 Kc)
267 Converts CHG-4 to CHG-5 in field (cancelled).
268 Converts CHG-5 to make CHG-6 in field (cancelled).
269 Consists of KIT 267 and 268 to convert CHG-4 to CHG-6 (cancelled).
270 Similar to KIT 215, modifies CSS-1B to provide automatic switchover to station standard should internal standard fail.  Creates CSS-3. S-1026
271 Mounting kit.  Adapts RTPD for mounting in CY-579 cabinet as required by RCWB.  Can be used for RTP( )-1 series also.  10/21/65 S-1028
272 Mounts RTID for mounting in CY-579 cabinet as required for RCWB.  Can be used for TRI( )-1 series also. 10/21/65 S-1028
273 GPT-10K Substitutes 240/480 V power input transformers, in place of current 208V transformers.  3-ph 50/60 cps for primary operation on voltages 480, 450, 430, 410, 390, 240, 225, 215, 205, and 195V.  10/25/65 S-1156
274 GPT-10K Field mod to accept 380V, 3-ph input power.  Includes audio transformer mounting rails and cabline. 10/27/65 S-1157
275 ATS-2 Modifies tuning unit TU-2 to provide dynamic brake on resistance control motor (prevents override) and improve tuning gear train alignment.  10/28/65 S-1041
276 Converts HFIR-1 to HFIA-1.  Retains most of ledex control but slaves channel A and B together  11/15/65
277 Converts RTMU-1 to RTMU-2.  Provides 1.  dual character recognition, 2. improved pc board, 3. extension 12VDC supply for AK-101  11/15/65
278 TTR-10 Mod main chassis assembly to accept TPCA-1 remote  control.  Modify AX-418.  Add ledex switch SW-380 with fanning strip and associated wiring.  Converts TTR-10 to TTR-12 S-10148
279 GPR-92 Mod converts GPR-92 to GPR-92A to accomplish the following.  12/7/65 
  1. Broadband input and reduce cross modulation with broadcast transmitter
  2. Capacity of HFO trimmer reduced making tuning less critical.
  3. Improved AGC prevents overloading from strong signals.
  4. Improved product detector, bandswitch shaft changed from metal to insulated type, reduced sensitivity, better isolation between input and output RF connectors.
280 AMC-6-3 Changes power supply from tube to solid state. 12/10/65 S-1056
281 HFS-1, HFSR-1, HFSA-1 Mod to reduce spurious responses, improve pull-in and hold-in ranges of phase detector, and operation of sync indicator.  12/13/65  See KIT 295, HFSA-1
282 KMCU-1 kit to SBT-1KF 12/20/65
283 CU-2 Diode/resistor replacement, 1/31/66.  Kit is intended to provide a complete replacement package for the diode sensors and resistance element of the RF bridge in directional coupler unit, TMC model CU-2.  Instructions only, per D. Const. 2/21/67 S-1134
284 AN/FRT-39/40/62 High voltage warning lamp mod.  D.W.C. 3/8/66 S-1101
285 GPT-40K AT-106.  An insulated block with 2 spring loaded contacts #8121 and E8122.  Purpose to increase creepage between plate voltmeter leads, therefore increasing reliability of equipment involved. S-1082
286 Updates KIT 232A to provide same operation as KID 232B. 3/14/66 S-1081
287 Mod STR-1 to STR-2, provides A4020 IF boxed with FX-195-2.  3/17/66 S-1100
288 PAL-40K Provide 480/240V power input transformer (use in conjunction with KIT 273 for GPT-40K).  Replaces main HV transformers and includes auto transformer for control circuits, new wiring and circuit breakers included. Replaces TF211 w/ TF335(3).  Adds TF336 autotransformer (1).  4/1/66
289 AN/FRT-62 HVRA-1 drawer (complete). S-1123
290 VLRA, VLRC Low pass filter kit (FX-211).  Affects S/N's 1-30 plus 19498.
291 GPT-10K Replaces rear doors with removeable panels.  Includes hardware and instructions for field mod.  4/28/66
292 RFK-1A Provide shielded cable on ALDC line to reduce hum pickup in ALDC circuit.
293 DDR-7J Add AX-625 (1-3/4" panel with 4 position switch and MIKE jack, to accept MK-102.  AP-134 power supply in cabinet.  This applies to S/N 26565 only.  5/9/66
294 GPT-10K-L8 Airplane mod to frame.  5/10/66
295 Mod HFS to HFS-2 S-1098
296 DDR-506 Mod LRCB to LRCD per engineering instructions.  5/12/66 S-1099
297 Mod to update AZ-103 for use in conjunction with HFS-2, applies to RTTD-1 and RTTD-2. S-1108
298 TTRR-( ) Mod of RF modules to improve AGC characteristics and to insure interchangeability of modules. 6/29/66 S-1118, S-1117, S-1116, S-1115
300 Converts  RTMU-1 to RTMU-2 to provide additional cooling.  6/24/66 S-1135
301 MSA-4 Converts MSA-4 to MSAR-4.  6/12/66
302 HFS-4 Converts HFS-4 to HFSR-4 synthesizer with  Technimatic control.  6/18/66
303 HFR-4 Converts HFR-4 to HFRR-4 with Technimatic control 6/18/66
304 Mod of IF section of STR-2 and SMR-2 to improve gain stability and AGC action. S-1111, S-1112
305 Mod of IF section of STR-1, SMR-1 and receiver section of TTR-10 to improve gain, stability and AGC action. S-1120, S-1121, S-1122
306 DDRR-5M Adds AK-101 S-1127
307 Adds floating 12V power supply AK-101 S-1128
308 Converts MCU-2 to MCU-2A S-1124
309 Adds AK-102 to RTI( ) isolation TTY keyer S-1129
310 Provides power supply to AK-102 to allow positive grounded neutral keying TTY input
311 Converts SMEA-1 to SMEB-1.  Adds ledex to channel select switch.  8/1/65
312 Mod Utility Towerco 150' tower type 170KDAM for operation from 300-550Kc with LFTD-1.  8/3/66 S-1148
313 Solid-state rectifier plug-in for GPT-750 (872A only) S-1152
314 Convert DDR-5A to DDR-5A (sic).  Equipment is customer-supplied cable only and instructions
315 SBT-1KE Includes 115V version of KMCU-1 for Londonderry.
316 CHG-2 Updating certain components.  1. Replaces C2791, 2792 & 2793 with CM-20-F-102G silver mida capacitors. 2. Change S1012 to ST-103-24-62.  The are direct replacements of currently installed components. S-1012
317 HFP-1 Mod with muffin fans to ease heat.  Converts HFP-1 to HFP-1A. S-1138
318 Electronic T/R switch kit. S-1166
319 Remote control panel for PAL-350 & PAL-1K
320 PAL-1K Modifies PS-4A (low voltage power supply) to provide a push-to-talk relay which in the stand-by condition: a. Biases linear amplifiers to cut-off, and b. shuts off GHG (on SBG).  Relay to operate on not more than 50V.  Notes indicate this mod to reduce white noise by 10dB.  WLD 11/8/66 S-1155
321 GPT-10K Cut off final plate current and exciter in "key up" condition.  Onnly for GPT-10K's over 19415 or models modified by KIT 22 or sell KIT 224 and KIT 321.  10Kw white noise.  R. Hay 11/21/66
322 GPT-40K Cut off final plate current, includes KIT 321, to reduce 40Kw white noise.  R. Hay 11/61/66 S-1247
323 GPT-200K Cut off final plate current, includes KIT- 321and 322, to reduce 200Kw white noise.  R. Hay 11/61/66
324 Mod to protect RF level meter in HFP-1, -1A, -2, -2A, -2B.  Meter currently pins when plate voltage comes up before heaters warm up.  Failure of meter also occurs when B+ in HFI fails.
325 2-wire folded doublet installation kit, 2-6Mc, complete with TRC-500/50/600 w/ assembly instructions for installing on customer poles.  1/28/66 EAMJr
326 Same as KIT- 259 but for APP-110 drawers only.  12/12/66.
327 GPT-10K Mod for IPA and PA band switch to stabilize power output on high band.  12/27/68
328 STR-1A,-2B,-2C External squelch mod.  1/4/67 S-1168
329 SMEE-1, SMEA-1 Adds additional 8 contact wafer on channel switches with connector on rear apron.  Used first on GPTA-2.5FB to provide antenna coupler control.  Creates SMEE-1A.  2/3/67 Hay
330 STR-1 Squelch mod for STR-1 (FAA), converts to STR-1Y S-1186, S-1172
331 STR-2 Squelch mod for STR-2 (FAA), converts to STR-2Y
332 GPT-10LF Residual noise kit FRT-74.   WLD 2/10/67
333 AN/FRT-52, -52A, -54, -54A Addition of SBG-5.  Add solid state exciter to these transmitters (retains existing spectrum analyzer).  Exciter consists of (1) MMX-1-6/UL, (1) TMX-2A WRG harness mtg hardward tech manuals. TMX-2A is improved version of TMX-2.  (Tele-Sig Model 123).  Details of changes no yet available but includes improved freq response and individual channel overload provisions.  MMX-1-6/UL same as MMX-1 except with 6 Kc channels instead of 3 Kc channels.  2/21/67
333A Adds SBGM-4 (CHGM-4 and CMRM-4) to GPT-10K (unsythesized)
333B Adds MXM-2 to unsythesized GPT-10K or -40K.  Creates GPTM-40KJA
333C Adds SBGM-4 and TIS-3A to unsythesized GPT-( )
333D Adds SBGM-4 and TIS-3D to unsythesized GPT-( )
333E Adds SBGM-4A to GPT-10K (s/a 333A but 250KHz IF)
333F Adds SBGM-4 to synthesized GPT-10K (having SBG-1).  E Miller 1/16/70 S-1307
333G Adds MMXM-2 to synthesized GPT-10K-RA7 (with SBG-1)  (AN/FRT-39K).  PES 5/3/71.  Applicable to -R( )8
333H Adds MMX-4 to GPT-10K
334 TLA( )-2.5K Addition of transmit/receive relay to antenna circuit.  Uses RL177, operated from SME( )-1.  Auxiliary contacts on RL177 operate PTT contacts in transmitter.  Optional item on all GPT-( ). 3/6/67 S-1187
335 AN/FRT-39/-39A Back fit kit for 10KW and 40KW transmitters.  WLD 3/31/67
336 Marine mod of GPTA-2.5EB
337 Silencing mod for LSP-4
338 Mod of GPR-92  (Latin America) GPR-92LA
339 Converts VLRB-1 to VLRC-1
340 SBT-1K-SX2 Substitutes MCU-2A in place of SWR-1K S-1197
341 Muting of MSA-1 S-1202
342 Dual LPFA-40K filter installation kit
343 Keying mod to SBE-8, -9, -10.  Req by Burns & Doyle on 7/20/67
344 Converts TIS-3A to TIS-3D (see KIT-251) S-1226
345 Converts TIS-3 to TIS-3D S-1276
345-1A Peak power metering kit S-1310
346 Convert QDP-HX5500B1X11 to QDP-FH5500B1X11 Req. by Martinengo
346-1A Peak power metering kit S-1313
347 AP-129 mod. Req. by Coggia S-1208
348 "key-up" transmitter noise reduction kit. Req. by Rozzo & Catrona 10/12/67 S-1211
349 Conversion of MMX to MMX-1M.  Req. by Burns, 10/26/67 for auto operation on emergency frequencies.  CK-1452, CK-1494
350 Assigned to Project 15, C size
354 RF Gain control kit for STR-1
355 Direct reading power meter kit (KIT-355-1/-2/-3)  EAM 12/69
356 Mod of rear door on GPT-10K8 and RF output out the top.  Transmitters cannot be butted because doors must swign open.
357 Replacement of tube type regen divider with transistor type in DDR-5
358 Addtion of TFP-2.5K to GPTA-2.5K
359 MMX improvements E-3343
360 LPA fan kit (7/1/69)
361 Replacement of all rear doors on GPT-10K for van installation, also RF output from top of transmitter, for butted transmitters.
362 Attenuation pad for AJP-7 SBT-3KVHF G. Orlandi 11/14/69 S-8001
363 Mod of MMX to operate w/ HFTA-10K to reach certain carrier vs. freq. programming.  O. Pose 11/19/69
364 Rear ventilation kit for GPT-20KW (van mount) 3/10/70
365 Rear ventilation kit for non-van-mount 3/10/70
366 Kit of plug in boards for MMXM-2 less LSB for AEC/Mark Zolly Chief Electronics Eng. 4/10/70
367 Mod for CW keying ckt, time delay, MMX( )-2.  See KIT-383.  12/8/70
368 Mod MMXM-2 to MMXA-2 to include KIT-349 and KIT-363(modified) to be used with MRU-33 (ITT Makay Marine)  Ben Nap 4/28/71 S-1283
369 Kit to improve cooling for LPA-1 (when installed in cabinet MS-5373)  G. Bliss 4/28/71
370 Shock mounts BCT-10KA and vents to sides and top. 5/11/71 S-1279
371 MCTR-10K Improved PA band switch cooling.  Parts consist of (6) CC-109-38, (6) MS-1601, 1 air duct.  For S.O. 35-3037.  6/23/71
372 External metering ckt for HFT( )-10K( ) 7/2/71
373 Mod MMX(M)-2 to MMX(A)-2B for use with HFTA-1KJ2.  7/8/71
374 TER-18KC conversion to TER-25KC (with flanges?) 8/20/71 S-1308
375 R-390A/URR Lexington Army Blue Grass stabilization kit for R-390A/CV-157. Neil dePasquale/O Pose S-1316, S-1315
375A SBG-1 cabinet complete with slides and cabling but no equiopment (W Dearns) 8/26/71
376 SBT-1KQ Stabilization kit (incorporates an MMX( )-2A).  Neil dePasquale 5/22/72
376A Remote access to Bird Coupler in FRT-40 for remote console display.  8/26/71
377 HFT-10K Blower mod kit.  9/9/71 S-1287
378 Antenna attenuator assembly (receiver) 10/6/71 George Fleather S-1286
379 Mode block for COR-4B( ) system  10/11/71 S-1285
380A PAL-10K (manual) Replaces 8794 tube with 4CX10,000J 12/3/71 S-1301
380B PAL-10K (automatic) Replaces 8794 tube with 4CX10,000J 12/3/71 S-1298
381 HFT-10K series Automatic high voltage recycling (see MC TM 10KES for info)  2/18/72
382 MRU-33 Switchable load resistor assembly.  2/24/72
383 MMX( )-2 CW keying time delay.  2/25/72 S-1293
384 HFTA-10K, HFTM-10K 5/1/72
385 HFTM-1K 5/2/72 S-1295
386 HFTA-1K Reliability improvement kit for HFT-1K transmitters S/N 40310,40311,40312,40313,40314,39849,39850,39851 5/3/72 S-1299
387 AN/FRT-39 Permits remote control of plate voltage 5/31/72
388 AN/FRT-40 Permits remote control of plate voltage 5/31/72
389 HFT( )-10K( ) Transmitter reliability of 1st and 2nd amplifier 10/24/72
390 HFT( )-1K( ) Transmitter reliability of 1st and 2nd amplifier 10/24/72 S-1306
391 HFT( )-10K Shock mount kit for HFT( )-10K first used on HFTA-5KJ
392 MMX( )-2 Remote control of freq and mode of MMX 2/20/73 S-1314
393 RSU-1 Mod of phase detector 6/7/73
394 DD-100 Spare part replacement of DD100 S-1320
395 HFTM-10KJ & JS Removal of capacitor motor drives & replacement with manual controls with counter readouts
397 MMX( )-2 Remote control of MMX for use with HFTR-1KJ2 (MMXR-2B)
398 CFA-3 Mod kit for changing frequency (2295, 1900, 1870)
399 SYM-3202 Consists of MPA-1 with handset and jacks.  Number assigned to L. Klein
400 HFT-1K 7/11/74 S-1343
401 HFTA-1KJ2 Mod interfacing kit for ATSA-2B with HFTA-1KJ2(1P)
402 Decoupling unit used to interface ATSA-3 with transmitters.  11/12/74
403 CFA-2 Polar keying circuit.  11/12/74
404 GPR-110 Automatic receiver tuning for GPR-110 (Wide World Wilcox) 11/12/74
405 MFT-10( ) AX-5143  1/30/75
406 HFTA-10K ALDC and load sense adjust modficiation.  4/9/75
407 HFTA-10K Tuning vacuum capacitor mod.  5/2/75
408 HFL( )-10K Protection cutoff circuit for drive-up and loading for all 10K transmitters
409 HFL( )-10K HF drift correction
410 HFT-1K, GPT-1K Transmitter shock mount 8/13/75
411 TU-2A Transportable kit  8./14/75
412 Fan assembly (no info)  11/18/75
413 GPT-1K series Top blower kit  12/31/75
414 GPT-1K series Fast tuning kit  12/31/75
415 GPT-10K Step down transformer AX5113 TF410
416 GPR-110 Mod to stabilize DC loop  3/31/76
417 HFTA-1KJ Upgrade of distortion and power
418 HFTM-10K series Tune capacitor mod kit, converts air cap to vaccum (manual)  5/14/76
419 HFTM series Same as KIT-377 with addition of one new main blower BL145  5/14/76
420 GPR-110 Power transformer and M9 mod  6/3/76
421 HFL-100A Bandswitch assy, harmonics, etc., mod 6/9/76
422 GPT(R)-1KCE4 Update kit for #524536 (25 transmitter, Chile)  10/7/76
423 MMX( )-2 T/R switch assy to improve receiver noise rejection.  12/28/76
424 HFTA-1KE To shift freq 1KHz  3/24/77
425 HFT-1K/HFT-10K Exhaust air damper control w/ smoke detector.  3/31/77
426 GPT and HFTA series transmitters Automated antenna tuner ATSA-2 updating kit.  4/27/77
427 GPTA seriess GPTA-1K system up-dating (Chile--6).  6/9/77
428 AMC-8 Conversion of AMC from 70 to 50 ohm operation.  8/26/77
429 HFT-1K ALDC/load adjust/trigger.  11/7/77
430 GPR-110 GPR-110 update.  1/5/78
431 GPR-110 Converts IF/Synth power supply  8/10/78
441 MMXR-2B Convert MMX-2B to remote

 

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