WS19 ws19 19 set wireless set 19 wireless set no19
WS19, WIRELESS SET NO 19, 19 SET, WS18, 18 SET, WS22, 22 SET, WS38, 38 SET

The Wireless-Set-No19 Group
Royal Signals


EMERs by Number.


  1. For a general background to the EMER numbering system, see "EMERs - A Valuable Resource" on this web site.
  2. In the EMERs below, "x" stands for the Part Number.
  3. This list is a compilation of those EMERs which would, today, have been included in the three sections,
    Telecommunications, Communications Installations and Test and Measurement.

  EMER Equipment Remarks
  B20x Training Set, Universal, Wireless, No 1  
  B45x Infra Red Detector Head  
  B46x Infra Red Detector, Vehicle  
  B50x Wireless Set SPF Mk II (Naval WS19 variant)  
  B50x UK/VID-581 (re-issued?)
  BY21x Detector Set SCR-625  
  C00x Magnetic tape recorders  
  C03x Telephone loudspeaker  
  C04x Telephone, Loudspeaking, LOU 1  
  C11x/1 Telephone, Loudspeaking, No 2 (YA2803)  
  C11x/2 Telephone, Loudspeaking, No 5 (YA5296)  
  C11x/3 Telephone, Loudspeaking, No 1 (YA2796)  
  C11x/5 Telephone, Loudspeaking, No 4 (YA4930)  
  C15x/10 Apparatus, Loudspeaking, No 10  
  C15x/3 Apparatus, Loudspeaking, No 2  
  C15x/4 Apparatus, Loudspeaking, No 3 (Station Nos 1&2 ZB 1500/1/2)  
  C15x/6 Apparatus, Loudspeaking, No 5 (ZB 10260)  
  C15x/7 Amplifier, 50W (Vortexion)  
  C15x/9 Apparatus, Loudspeaking, No 9  
  C20x Amplifier AF 2 watt Sealed Nos 1 (12V) & 2 (24V), Data Summary  
  C21x L/S No. 10  
  C32x L/S No. 25  
  C33x L/S No. 26  
  C34x L/S No. 24  
  C36x L/S No.UK/PIC-360  
  C40x Amp A.F 2W  
  C41x Wire Recorder Model 50 (Type 13-A-3D)  
  C42x Recorder with playback, wire, No1  
  C42x JB interconnection (reissued?)
  C43x Intercom. 6 way  
  C45x AF amp 5W  
  C57x Recorder reproducer ET 1521  
  C58x Recorder reproducer 4.2 model LSP  
  C59x Recorder reproducer, 640  
  C60x Record player, Goodsell  
  C61x Recorder/reproducer 731A  
  C65x Calibrator, paper speed kit No.1  
  C66x Recorder reproducer all types  
  C66x Recorder/reproducer REH1 (reissued?)
  C67x Recorder/reproducer REH 304  
  C68x Recorder/reproducer RE301  
  C69x Recorder/reproducer Philips EL 3302  
  C70x Microphone assemblies  
  C71x Receiver assemblies  
  C72x Microphone/receivers combined  
  C74x Clansman audio accessories  
  CZ12x Telephone, Loudspeaking, No 2 Canadian  
  D10x Wireless Set No 5  
  D11x Wireless Sender C11(SSB) (reissued?)
  D11x Wireless Set No 5HP  
  D12x Wireless Sender C11  
  D13x Wireless Sender D11  
  D14x Wireless Sender No 12 (ZA3244)  
  D15x Wireless Set No 12 HP, Data Summary  
  D16x Wireless Sender D13  
  D17x Wireless Set No 16 Mks 1 and 1*  
  D26x Wireless Set No 33  
  D29x Wireless Set No 36  
  D36x Wireless Sender No 53  
  D40x Wireless Sender C41  
  D45x Wireless Set No 76 (ZA18974)  
  D50x Admiralty Sender 5G (Modified)  
  D70x Wireless Sender AD67D  
  D74x Wireless Sender Marconi SWB8E  
  D75x Wireless Sender SWB11E  
  D79x TRC42/TBR47 with Larkspur variables  
  D81x Wireless Sender SWB11E Modified for SSB working  
  DY60x RCA Transmitter ET-4331  
  DY63x RCA Transmitter ET-4750  
  DZ36x Wireless Set No 43 Canadian  
  DZ36x/2 Wireless Set No 43 Mk II Canadian  
  E11x Reception Set R102  
  E12x Reception Set R103  
  E13x Reception Set R103A  
  E16x Reception Set RS5E  
  E16x Reception Set R106 Mks 1 and 2 (reissued?)
  E17x Reception Set R107 (ZA3050)  
  E18x Reception Set R100  
  E19x Reception Sets R109, 109A, 109B, 109C  
  E21x Reception Set R201  
  E23x Reception Set R206, Mk 1 & Power Supply Unit No 15 (became E28x)
  E24x Reception Set R206, Mk 2 & Power Supply Unit No 33 (became E27x)
  E25x Reception Set R208 (ZA10083) (became E30x)
  E26x Reception Set R209 Mk 1 (also E31x)
  E27x Reception Set R206, Mk 2 & Power Supply Unit No 33 (was E24x)
  E27x Reception Set R209 Mk.2 (also E31x/2)
  E28x Reception Set R210 (became E32x)
  E28x Reception Set R206, Mk 1 & Power Supply Unit No 15 (was E23x)
  E30x Reception Set R212 (became E62x)
  E30x Reception Set R208 (ZA10083) (was E25x)
  E31x Reception Set R209 Mk 1 (also E26x)
  E31x/2 Reception Set R209 Mk 2 (also E27x)
  E32x Reception Set R210 (under development) (was E28x)
  E32x Reception Set R213  
  E33x Reception Set R211 (was E61x)
  E34x Reception Set R212 (became E64x)
  E38x Reception Set R216 (also E45x?)
  E40x Reception Set R308 (also E69x?)
  E40x Reception Set R218 (under development) (became E42x)
  E41x Reception Set R219 (under development) (became E44x)
  E42x Reception Set R218  
  E42x/1 Station Radio  R220/R220 Mk 2  
  E43x Reception Set R221  
  E44x Reception Set R219 (was E41x)
  E45x Reception Set R216  
  E50x Reception Set R222 (under development)  
  E52x Reception Set R1100  
  E58x Reception Set R230  
  E59x Reception Set R231  
  E61x Reception Set R211 (became E33x)
  E61x Reception Set R234  
  E62x Reception Set R235  
  E64x Reception Set R212 (was E34x)
  E66x Reception Set R209/2/B  
  E68x Reception Set R301 / Mk 301 (also F68x?)
  E69x Reception Set R308 (also E40x?)
  E70x Reception Set DST100  
  E71x Reception Set CR100  
  E73x Reception Sets Philco BP412 & BP413  
  E74x Reception Set Eddystone 730/4 (reissued?)
  E74x Reception Set, Broadcast BV-613  
  E75x Reception Set RC67  
  E76x Reception Set UHF Special  
  E77x Reception Sets AR88D & LF  
  E78x Reception Set UK/TRR-328 (reissued?)
  E78x Reception Set R1294  
  E79x Reception Set R1395 ?
  E79x Reception Set Racal RA329B ?
  E81x Reception Set RG35  
  E82x Reception Set DFG12 Mks 1, 2 and 3  
  E83x DF Receiver DFP4  
  E84x Reception Sets PCR Nos 1, 2 and 3  
  EZ12x Reception Set Canadian R103 Mk 1  
  EZ13x Reception Set, National HRO  
  EZ76x Reception Set AR-88 (Canadian Version)  
  EZ79x Reception Set Canadian VRL  
  EZ84x Reception Set Canadian R209  
  F10x Wireless Set No 1  
  F11x Wireless Set No 2  
  F13x Wireless Set No 7  
  F14x Station Radio A13 (reissued?)
  F14x Wireless Set No 8  
  F15x Wireless Set No 9  
  F16x Station Radio A14 ?
  F16x Wireless Set No 10 ?
  F17x Wireless Set No 11  
  F19x Station Radio BCC HF156  
  F20x Station Radio UK/PRC-316 (A16) (reissued?)
  F20x Wireless Set No 14  
  F21x Wireless Set No 23  
  F23x Wireless Set No 17  
  F24x Wireless Set No 18 Mks I, II & III  
  F25x Wireless Set No 19 Mk III /3 (became F27x)
  F25x Wireless Set No 19  
  F25x Wireless Set No 19 Mk II /2 (became F26x)
  F26x Wireless Set No 19, Mk II (was F25x/2)
  F27x Wireless Set No 21 ?
  F27x Wireless Set No 19 Mk III (was F25x/3) ?
  F28x Wireless Set No 22 (ZA11694) (was F31x)
  F31x Wireless Set No 22 (became F28x)
  F32x Wireless Set No 26  
  F33x Wireless Set No 27  
  F33x Wireless Set Canadian no 29 A (also FZ35x)
  F34x Wireless Set No 28  
  F36x Wireless Set No 31 Mk 1  
  F37x Wireless Set No 31 AFV (reissued?)
  F37x Wireless Set No 32D  
  F38x Wireless Set No 31 Mk 2  
  F40x Wireless Set No 37  
  F40x Station Radio A40 (reissued?)
  F41x/1 Wireless Set No 38 Mks I, II and II*  
  F41x/2 Wireless Set No 38 AFV  
  F41x/3 Wireless Set No 38 Mk III  
  F45x Wireless Set No 42  
  F46x Wireless Set No 46 (ZA11622)  
  F48x Station Radio A41 No.1 & 2 (reissued?)
  F48x Wireless Set No 48  
  F50x Station Radio A42 No.1 & 2  
  F50x Wireless Set No 57 (became F63x)
  F51x Wireless Set No 62 (was F64x)
  F52x Wireless Set Canadian No 52  
  F53x Station Radio A43R  
  F54x Station Radio C/PRC-26  
  F55x Wireless Set No 68P, R & T, (was F67x)
  F56x Station Radio A510  
  F57x Station Radio UK/PRC-350 (later)
  F57x Wireless Set No 88 ?
  F60x Wireless Set No 78  
  F63x Wireless Set No 57 (was F50x)
  F64x Wireless Set No 62 Mk.1&2 (became F51x)
  F65x Wireless Set No 88 ?
  F66x Wireless Set No 88, Type A, AFV (became F72x)
  F66x Station Radio UK/GRC-391(Storno CQP600)  
  F66x Wireless Set No 63  
  F67x Wireless Set No 68 (became F55x)
  F68x Reception Set R301 / Mk 301 (also E68x?)
  F69x Wireless Set No 88 ?
  F71x Station Radio 128B  
  F72x Wireless Set No 88, Type A, AFV (was F66x))
  F72x Wireless Set CN348, Data Summary  
  F73x Wireless Set Burndept, BE201  
  F74x Station Radio 128 / Mk 128  
  F75x Station Radio 119B / Mk 119  
  F76x Station Radio  Mk.121 & 122  
  F78x Modulator & 3 tone generator AF 40S  
  F79x Station Radio LL46U  
  F82x Radio Terminal Set AN/TRC-3G&3H. Radio Relay Set AN/TRC-4G&4H  
  F82x Station Radio Pye PF2UB  
  F83x Station Radio Pye U450L  
  F84x Station Radio F20 UK/PRC-392 PYE 2FMB  
  F85x PYE Bantam HP1AM  
  F87x Station Radio UK/PRC-398  
  F88x Radio L470  
  F89x Radio Mitre TR1007C  
  F92x Station Radio Storno CQP 863 C2X8  
  F93x Station Radio Storno CQP 833 C2X8  
  F94x Station Radio Storno CQP 813 C2X8  
  FZ15x Wireless Set Canadian No 9 Canadian  
  FZ25x Wireless Set Canadian No 19, Canadian  
  FZ25x/2 Wireless Set Canadian No 19 Mk II  
  FZ25x/3 Wireless Set Canadian No 19 Mk III  
  FZ35x Wireless Set Canadian no 29 (also F33xA)
  FZ48x Wireless Set Canadian No 52  
  FZ70x Wireless Set Canadian No 58  
  G30x Station radio AN/PRC-47  
  G35x Station Radio Pye Westminster W30AM  
  G40x Wireless Set No 49 / Station Radio C40/B40  
  G40x Station Radio Pye F10FM (fixed) (reissued)
  G42x/1 Station Radio  B43/R220 Mks 1/1 & 3/1  
  G43x Station Radio  B43/R220+R220/R220 Mk 2  
  G47x Station Radio B44 Mk 2  
  G48x Station Radio B44 Mk 3  
  G51x Station Radio B45  
  G53x Station Radio B47  
  G55x Station Radio B48  
  G70x Station Radio B70 (under development)  
  GY62x Reception Set AR-88 (US Version)  
  GY70x Reception Set R106 Mk I and Mk II (US Version)  
  H00x C42/45 radio  
  H11x Osc. Airmec 279  
  H12x Osc. Solartron CD1400  
  H14x Station Radio C12 (reissued)
  H14x Osc. min. portable No.1  
  H16x Station Radio C13  
  H18x Station Radio C14  
  H20x Station Radio C15 (VC102)  
  H36x TAVR Battalion master station  
  H37x TAVR Company master station  
  H38x Station Radio F60FM (static)  
  H40x Station Pye F100FM  
  H41x Wireless Set No 86 / Station Radio C41  
  H42x Station Radio C41/R222 & C41/R222, MK 1/1  
  H43x Station Radio C42 No.3  
  H44x Station Radio C42 No.1  
  H45x Station Radio C45 (under development)  
  H46x Station Radio C43  
  H48x Station Radio C44 Mk 1  
  H49x Station Radio C44 Mk 2  
  H50x Station Radio C45 No.1 (became H51)
  H51x Station Radio C45 No.1 (was H50x)
  H52x Station Radio C42 No.2  
  H53x Station Radio C45 No.3  
  H58x Station Radio C50/R236  
  H59x Station Radio UK/VRC-321  
  H66x Station Radio UK/FRC-390 (Storno CQF 630 series)  
  H67x Station Radio UK/VRC-391 (Storno CQM 630 Series)  
  H70x Station Radio C70  
  I06x Station Radio D11/R234/R234  
  I54x Wireless Sender E10  
  I59x Wireless Sender E11  
  I61x Wireless Sender E12  
  IY212-2 Vibratory Power Supply MI-8319 (AR-88 Rx)  
  IY21x Vibratory Power Supply, Type 686-S (National)  
  IY27x Power Supply, Type 697 (National)  
  J02x Telephone type (AO) relays  
  J02x K600 relays  
  J03x K300 relays  
  J04x K300 relays  
  J07x Telegraph relays 299AN/320AN (also N64x)
  J08x Polarised relay Carpenter 3E(YA 8225) (also Q02x)
  J09x Creed relay No.27 (also T28x)
  J10x Wireless Sender E10/WS15  
  J11x Relays, Siemens high speed  
  J12x Siemens miniature high speed relays  
  J15x GEC Miniature Relay Normal Type (also Q05x)
  J16x GEC Miniature Relay - Low loss, low capacity (also Q06x)
  J17x GEC min. relay heavy duty (also N52x)
  J20x Uniselectors GPO standard  
  J23x Motor PM1A (24v)  
  J24x Special valves, handling  
  J25x Vibrators  
  J26x Battle batteries  
  J27x Quartz crystals  
  J28x Metal rectifiers  
  J29x Cold cathode tubes  
  J30x Terminal blocks  
  J35x Microphone elements  
  J36x Microphone handpower No.1 or possibly 21  
  J37x Receiver elements  
  J38x Loudspeakers  
  JY10x Wireless Set No 48 (US Version)  
  JY11x/2 Wireless Set No 19 Mk II (US Version)  
  K01x Clansman battery charging equipment  
  K02x Sine wave static converter transipack 606/ST/600M (was K07x)
  K03x Power Supply Unit No 5 (WS18/68)  
  K05x Blocks, Terminal  
  K06x Inverter 200VA  
  K07x Sine wave static converter transipack 606/ST/600M (became K02x)
  K08x Sine wave static converter transipack 606/ST/1250/B  
  K10x Vibrator PSU No.12 12v  
  K10x/1 PSU No 5 Mk1 (ZA17134), Mk1* (ZA24767) & T (ZA25746) for WS18  
  K12x Generator, Hand, 10W Mk II (WS48)  
  K13x Charging Sets, pedal-driven, 60W, No1, Mk1  
  K14x Vibrator PSU No.12 24v  
  K15x Vibrator PSU No.12 24v Mk.2  
  K16x Supply unit rectifier (R106)  
  K17x/2 Supply Unit Vibratory No 2  
  K17x/5 Supply Unit Vibratory No 12, 24V input (ZA43207)  
  K18x Supply unit rectifier No.4(ZB0012)  
  K19x Attenuation Pads  
  K20x Vibrator PSU Type SC-999-E and -F (WS58 Cdn)  
  K22x Supply unit rectifier No.13  
  K22x/1 Supply Unit, Rectifier No 13 and smoothing unit No 1  
  K22x/11 Supply Unit, Rectifier, No 22 & Dummy Load  
  K22x/12 Supply Unit Rectifier No 23 and engineering channel amplifier  
  K22x/13 Supply Unit Rectifier No 27 (under development)  
  K22x/15 Supply Unit Rectifier No 27 (under development) (renumbered)
  K22x/4 Supply Unit, rectifier, No 1 (ZB6639) (R101)  
  K22x/5 Supply Unit, Rectifier, No 5 (ZB0179)  
  K22x/6 Supply Unit, Rectifier, No 8 (ZB0327) (DST100 Rx)  
  K22x/8 Supply Unit, Rectifier, No 19 (YA8087) & smoothing unit No 2 (YA8088)  
  K24x Smoothing unit No.19 & 20  
  K25x/1 Converter Unit, DC/AC No 8  
  K27x Smoothing unit 22 with dummy load  
  K28x/10 Supply Unit, Rectifier, No 4 (ZB0012) /(also T28x/10)
  K29x/1 Supply Unit, Rectifier No 7  
  K30x/1 Adaptor, Frequency range, No 1  
  K31x RF Amplifier No 2 (for WS19HP)  
  K32x/1 Drive and Monitor Unit SSB No 1  
  K32x/2 Drive and Monitor Unit SSB No 2 (E10)  
  K33x Supply Unit Rectifier No 27 (under development) (became K22x/13)
  K33x/2 Keying Unit, Carrier Frequency Shift, No 2 (ZA33600)  
  K34x Modulator Unit No 20 (reissued?)
  K34x PSU variable CT397  
  K35x Receiver Adaptor, Field, Carrier Frequency Shift  
  K36x PSU SK 13684  
  K36x/1 Unit Supervisor No 1 (also L65x)
  K36x/2 Unit Operator No 2 (also L36x/2, L66x)
  K40x/3 Remote Control Unit Nos 4, 6, 10 and Wireless Harness C  (WS53)  
  K40x/4 Remote Control Units H, Nos 1 & 2  
  K40x/7 Relay Unit No 12, Data Summary  
  K53x/1 Rejecter Unit No 1, Mks 1 & II  
  K53x/2 Rejecter Unit No 2  
  K58x Circuit breaker electronic  
  K59x/2 Amplifier, Aerial, Wideband No 3  
  K60x PSU + circuit breaker electronic  
  K62x PSU electronic full wave 0-40v  
  K65x PSU electronic fullwave 0-40v DC  
  K70x PSU transistorised No.1 24v  
  K71x Wireless Remote Control Unit No 1 Canadian (also KZ40x)
  K72x PSU electronic full wave 24v DC  
  KZ22x/1 Supply Unit, Rectifier No 1 Canadian  
  KZ31x RF Amplifier Canadian WS19 (became KZ41x)
  KZ40x Wireless Remote Control Unit No 1 Canadian (also K71x)
  KZ41x RF Amplifier Canadian WS19 (was KZ31x)
  L00x Summary aerial tuning units  
  L01x Mast telescopic 12 m T639  
  L04x Mast telescopic 27' No.1  
  L05x Mast lightweight C & S SP48  
  L06x Mast lightweight C & S SPM45  
  L07x Mast telescopic pneumatic 70' Clarke  
  L09x Antenna group AS-2336  
  L10x Rejecter unit R47 & 48  
  L11x Rejecter unit VHF no.3  
  L14x Coupler antenna multichannel  
  L20x Mast telescopic Clarke 12m PU 12  
  L21x Clansman VHF antenna system  
  L30x Aerial tuning unit 6 & 8  
  L36x Amp. RF No.9  
  L36x/2 Unit Operator No 2 (also K36x/2, L66x)
  L39x Station Kit, Radio, Amplifier, RF No 9  
  L39x Station Kit, Radio, Amplifier, RF No 7  
  L40x/6 Remote Control Unit N  
  L41x Drive/monitor SSB No.1  
  L42x Drive/monitor SSB No.2  
  L43x Frequency converter Racal RA 700  
  L44x Keying unit FS No.1  
  L45x Keying unit carrier FS No.2  
  L46x Modulator Unit No 20  
  L47x Receiver adaptor FS No.C1  
  L49x Facsimile Muirhead D900/901 AM/DJ  
  L50x Oscillator rack 188-LR5-2JA  
  L51x Drive and Monitor Rack FSK (used with wireless sender E11)  
  L52x Drive/monitor rack ISB/DSB  
  L54x Adaptor tel. radio low/high level  
  L55x Synthesiser freq. set  
  L56x Fax Muirhead D900/901-PD  
  L57x Radio tel. adaptor No.1 & 2  
  L58x Burst coder equipment AN/GRA-71  
  L63x Relay unit No.12  
  L65x Unit Supervisor No 1 (also K36x/1)
  L66x Unit Operator No 2 (also K36x/2, L36x/2)
  L67x Control box No.2  
  L69x VHF Larkspur  
  L70x Bruin-NATO system I/F  
  L70x Wireless Set No 63 (was F66x)
  L72x Carrier FS Radio Link (Initial Type)  
  L77x Wireless Harness Type A  
  L78x Wireless Harness Type B  
  M30x Vibrator DC 123S  
  M49x Combining set HF  
  M52x Bid/160/10  
  M55x Air/ground TV  
  N52x GEC Miniature Relay-heavy-Duty Type (also J17x)
  N54x Telegraph Relays 299AN & 320AN (alsoJ07x)
  Q02x Polarized Relay, Carpenter, Type 3E (YA8225) (also J08x)
  Q03x Repeater Telephone, 2-circuit, No3(W)  
  Q04x Repeater Telephone, 8-circuit, MkII (YB/YA 3758)  
  Q05x GEC Miniature Relay Normal Type (also J15x)
  Q06x Telephone Set F, HP  
  Q06x GEC Miniature Relay - Low loss, low capacity (also J16x)
  Q07x Networks, Balancing and Testing No 1 and No 2  
  Q08x Amplifier IT No 1 (ZA0327)  
  Q09x Amplifier Field Telephone No 1T  
  Q10x Repeater Field Telephone No 1  
  Q11x Repeater Field Telephone No 1, Mk1 and Mk2  
  Q12x/1 Digital Repeater  
  Q12x/2 Digital Repeater  
  Q20x Unit, Signalling VF No 3 Mks II & III  
  Q21x Repeater, Ringing No 1 (YB 01029)  
  Q23x Unit, Signalling VF 5-Channel  
  Q31x Repeater, Carrier Telephone, No 1 Mk1  
  Q32x Repeater, Carrier Telephone, No 1 Mk2  
  Q33x Repeaters, Carrier Telephone, No 2T and No 2  
  Q34x Repeater, Carrier Telephone, No 3  
  Q35x Repeater, Carrier Telephone, (1+1), No 1  
  Q36x Repeater, Carrier Telephone, (1+1), two-wire No 2  
  Q37x Repeater, VF Telegraph No 1  
  Q45x Balance & Bypass Filter Unit No 1  
  Q46x Balance & Bypass Filter Units 1 + 1  
  Q47x Filter, Balance & Bypass No 2A TE  
  Q48x Filter, Balance & Bypass No 2B  
  Q49x Filters, Line and Directional No 1  
  R17x Apparatus, Carrier Telephone, 12-Channel (Radio)  
  R18x Apparatus, Carrier Telephone, 1 + 3, Type CS3/CP  
  R19x Carrier Set, Telephone, 1+ 4, No 3  
  R20x Terminal Set Voice Net  
  R32x Terminal, Telegraph, V.F., 4/12 Channel  
  R33x 12-Channel V.F. Telegraph Terminal Equipment, Type T12A  
  R34x Telegraph Terminal, V.F. Equipment, Marconi Type H5000/H5001 (2 and 6 Channel)  
  R35x Terminal Set Telegraph Net  
  S00x Miscellaneous DC Telegraph Machines  
  S01x Teleprinter Systems  
  S02x Teleprinter 7B, (W.D.), All Marks  
  S03x Teleprinter T.100R  
  S04x Teleprinter T100R MK 2 and T100/ R, LL  
  S12x Teleprinter, Terminal Unit, MK. 111  
  S13x Teleprinter Terminal Unit, MK.1V  
  S14x Teleprinter Terminal Unit, (80 + 80)  
  S14x Trainer, Radar, A.A., Nos 10 and 10A ??  
  S15x Adaptor, Teletype (U.S.) Teleprinter (British)  
  S16x Equipment Table D.T.N. 2000  
  S16x Trainer, Radar, A.A. No. 15 ??  
  S17x Monitor, Telegraph Distortion, 10- Circuits, No 1  
  S18x Converter Teleprinter  
  S20x Typewriter, Telegraph, No 98  
  S22x Keyboard Perforator (P.O. Perforator No 44)  
  S23x Printing Reperforators Nos. 1 and 2  
  S24x Teleprinter Receiving Reperforator  
  S25x Reperforator, No. 7, TR, (W.D.), MK 3  
  S26x Keyboard Perforator 7P/N3  
  S27x Printing Reperforator, 50/75 Bauds, Type PER 1/R  
  S32x Teleprinter, Auto-Transmitter  
  S33x Tape Reader, Telegraph, Group 2  
  S34x Test Message Sender (TMG 10A)  
  S42x High-Speed Telegraph Equipment  
  S43x Morse Keyboard Perforator  
  S44x Morse Reperforator  
  S45x Reperforator, GNT., Model 451  
  S46x Morse Page Printer  
  S47x Wheatstone Transmitter (Elliott)  
  S48x Morse Transmitter (Creed)  
  S49x Wheatstone Transmitter G.N.T., Model 112  
  S50x Undulator, U.G. 6A, No. 3 (YB02446)  
  S51x Recording Bridge R.B. 150  
  S52x Recording Bridge R.B. 150/2  
  S53x Monitoring Bridge Type O.C. 12  
  S54x Puller, Tape, No, 3  
  S55x Tape Winder No. 3  
  S63x Fullerphones, Mk. IV. IV*. V. and VI  
  S78x Repeater, Synchronous Regenerative  
  T10x Telephone Set F, Mks. 1, 1*, 2 (became U60x)
  T10x/12 Control Unit SR No 2, Mk 1  
  T28x/10 Supply Unit Rectifier No 4 (ZB0012) (also K28x/10)
  T28x/11 Creed relay No 27 (also J09x)
  T30x Switchboard, Magneto, 10-Line, W.D.  
  T51x/3 Repeater Telephone, two-circuit, 1W & 1G (YB/YA 3757)  
  T57x/1 Repeater Stabilised, 2-wire, No 3 (YB 01034)  
  T58x/4 Telephone Set F,HP  
  U01x Dials, Telephone, Automatic  
  U03x Switchboard, U.C., 6- and 10-Line  
  U04x Switchboard, Magneto, 10-Line (W.D.)  
  U05x Equipment, Telephone Signalling, Command Posts, SAGW, No.1, Mk.1 and No. 2, Mk. 1  
  U06x Switchboard, Manual 12-Line, Magneto  
  U07x Switchboard, Telephone, Manual, 25-Line, Magneto  
  U08x Switchboard, Telephone, Manual, 16-Line, Unit Level  
  U12x Switchboard, A.T., 3796 and 10 + 50 over 65 (YA 3778)  
  U13x Switchboard, C.B., 873 and 5 + 20 over 25 (YA 6257)  
  U14x Switchboard, C.B., 935, 1 + 3 over 4  
  U15x Switchboard, C.B., 935, 2 + 4 over 6  
  U16x Switchboard, C.B.935, 3 + 7 over12 and 3 + 9 over 12 (YA 6147)  
  U17x Exchange, C.B., Multiple (W.D), Unit Type, N Positions  
  U18x Exchange, C.B., Multiple (W.D), Unit Type, N Positions  
  U19x Exchange, Field, 40 / 160 Line  
  U20x Exchange, C.B., Multiple (W.D), Unit Type, N Positions  
  U21x Exchange, Telephone, Central Battery, CB20  
  U22x Switchboard, Telephone, Manual, 5-Exchange, 4-Magneto 16-C.B. Extension Lines  
  U23x Circuit Distribution Aids  
  U23x/4 Equipment, Signalling, Carrier-Shift, No 1 (YB05422)  
  U24x Switchboard, Telephone, Manual, 3 Exchange, 9 Extension Lines  
  U27x Concentrator, C.D., 5-Line (YA 2707)  
  U28x Switchboard, Command, 200-Line (YA.2238)  
  U29x Exchange, Magneto (W.D.) Unit Type, N Positions  
  U30x Switchboard, F and F  
  U31x Keyboards, Multiphone, AD 569 and AD1316 (YA 4680 and YA 6346)  
  U32x Keyboard, Multiphone, A.D. 1594  
  U33x Telephone Terminal Equipment No. 1  
  U42x Switchboard, Teleprinter 15 Line, Mk 1 (YB 02616 and 40-Line, Mk. 1 (YB 02617)  
  U44x Teleprinter Monitor Unit  
  U47x Frames, D and P, 10-Wire, Mk. 1* (YA 2728)  
  U48x Test Frames, 20-Pair, Mk. II and 40-Pair, Mk. 1 (20PR. YA2770, 40PR. YA 2877)  
  U50x Unit, Amplifying, No. 23A-(YA 3419), No. 23B-(YA4847), No.. 23D-(YA 6460)  
  U52x Converter Signal Data  
  U53x Telegraph Automatic Routing in the Field. (TARIF)  
  U54x Automatic Trunk Dialling Directory Translator  
  U55x Management Information System (MIS), Bruin  
  U56x Computer Assisted Radio Relay Frequency Assignment System. (CARRFA)  
  U57x Exchange, Telephone, Automatic, 45/55V, 2-Exchange, 7-Extension Lines  
  U60x Exchange, Telephone, Automatic, 20-Lines  
  U61x Exchange, Telephone, Automatic, 40-Line  
  U62x Exchange, Telephone, Automatic, 100/150 and 48/64 Line  
  U68x Telephone Set D, Mk. V (YA 1853)  
  U69x Telephone Set F, Mks. 1, 1*, 2 (was T10x))
  U70x Telephone Set H, Mk. II (YA 2782)  
  U71x Telephone Set H, Mk. III  
  U72x Telephone Set J  
  U73x Telephone Set L (YA 3717)  
  U74x Telephone 332 CB  
  U75x Telephone Set, Flash Spotting  
  U77x Telephones, Tracker, No. 2  
  U78x Privacy Equipment No. 1, Mks. I, I* and II  
  U80x Telephone Set 706 BPO (MOD)  
  U81x Telephone Set (Plan 8)  
  U82x Telephone Set, Three Telephones, One Wall Control Unit  
  YZ66x Crystal Calibrator For WS19 Canadian  
Communications Installations  
  EMER Equipment Remarks
  A10x BID/150 Installations  
  B61x Installation of Commercial Radio Equipments in vehicles  
  C19x Station Radio C45/C48/B48 radio in Centurion Mk.5 (reissued)
  C19x Wireless Set No 38AFV Installation in Centurion Mk 5 OP Tank  
  C20x Wireless Set No 88AFV Installation in Centurion Mk 3 or 5  
  C20x Unknown Title (reissued?)
  C21x Station Radio C42/B47 in Centurion Mk.3 & 5  
  C22x Station Radio C42/C13/B47 in Centurion Mk.5  
  C44x Generator set 2000 3 phase silent  
  C52x Station Radio C13/C42/C45 in Centurion ARV Mk.2  
  C71x Station radio AVRE C42/B47  
  C85x Clansman Antenna Installations  
  D33x Abbott comms .175mm gun M107  
  D34x Station radio 105mm howitzer M109  
  D70x Misc Inst No 3 Clansman Secure Speech harness (reissued)
  D70x Station radio Chieftain Operator tank  
  D71x Station radio Chieftain gun tank  
  D72x Station radio Chieftain control tank  
  D73x Station radio Chieftain Command tank  
  E02x Basic Larkspur harness in Scorpion  
  E21x Equipment currently unknown  
  E24x Equipment currently unknown  
  E25x Equipment currently unknown  
  E26x Equipment currently unknown  
  E28x Equipment currently unknown  
  E29x Equipment currently unknown  
  F26x Technical handbook for TARE in the Field  
  H23x Larkspur II radio control harness B  
  H57x SR in truck 1 ton halftrack conversion WS19HP+WS19 to C45/C11-R210/R209  
  I04x Station radio D11/R230 in 1 ton Truck  
  I05x Station radio D11/R234 in 1 ton Truck  
  J10x EMER cancellation J 102,4,7  
  J16x Station Radio C11-R210/C45/R209 in Truck 1 ton 4x4 Humber, armoured  
  J31x W15 in 1 ton truck  
  J70x Basic Larkspur control harness B in FV 721 Fox  
  K01x Station radio FV 604 Saracen  
  K02x Station radio FV604 battery conversion  
  K19x Station Radio C13/B47 in Saracen  
  K20x Station Radio C42 in Saracen  
  K21x Station Radio C13 in Saracen  
  K22x Station Radio C42/B47 in Saracen Mk.1 & 2  
  K24x Station Radio C11/R10 in Saracen  
  K27x Station Radio C13/HP/C42 in Saracen  
  K28x Station Radio C11/R210/C42 in Saracen  
  K29x Station Radio C11/C13/R210/C42 in Saracen  
  K30x Station Radio C13/C42 in Saracen  
  K31x Station Radio C42/C45 in Saracen  
  K32x Station Radio C13HP/C42 in Saracen  
  K33x Station Radio C13HP/C11/C42 in Saracen  
  K35x Basic Larkspur control harness A/Saracen  
  K40x Wireless station Saladin Mk.2  
  K50x Station Radio C11-R210/C45/R209 in Saracen Mk 2, ACP, RA, Adjutant  
  K51x Station Radio C11-R210/C45/R209 in Saracen Mk 2, ACP, RA, CPO and ACPO  
  K52x Station Radio C45/B48 ACP, RA, Saracen Mk.2  
  K53x Station Radio C45/C45/B48/R209 in Saracen Mk 2, ACP, RA  
  K56x Power set supply rectifier12/24v  
  K59x Power set supply rectifier 24v  
  K63x Station Radio C13/B47 in Ferret  
  K65x Station Radio C12,13,42 in Ferret  
  K66x Station Radio C42/A41/A43 in ferret  
  K70x PSU Transistor No.1 24v  
  L26x/4 Lorry Installation, 3 ton 4x4 Wireless HP Types G, H, J of WS12HP, WS33, WS53  
  L30x/1 Lorry Installation LP WS19+WS19HP  
  L31x ATU command in 3 ton truck  
  L31x/1 Lorry Installation HP BC610+WS19, WS12HP+ WS19  
  L31x/3 Lorry Installation, 3 ton 4x4 Wireless HP Types D, E  
  L35x/1 Truck 3 ton GS Wireless R Type A  
  L35x/2 Truck 3 ton GS Wireless R Type B  
  L80x/1 DF Station, Transportable, Adcock No 1  
  L80x/3 DF Station, Transportable, Adcock No 3 and 3T  
  L81x/1 DF Station, Mobile, BC No 1  
  L81x/2 DF Station, Mobile, BC No 2  
  L83x DF Station, DFG24/4  
  L84x DF Station, DFP5  
  M04x Radio UK/VRC Pye W15 on vehicle  
  M10x Station Radio C11/210 in car  
  M10x/1 4x4 ACV Installation WS19+WS19HP  
  M10x/2 6x6 ACV Installation WS19+WS19HP  
  M11x/1 4x4 ACV Installation ET4332B+WS19  
  M11x/2 6x6 ACV Installation WS53+WS19  
  M38x Radio C42/B47 24v in vehicles  
  M42x Station Radio C45 24v in car  
  M43x Station Radio C11/R210 or C42/R210  
  M45x Station Radio B43/R220 in Car, Light  
  N18x Station Radio C45/C45/R209 Mk 2 in Truck 1 ton GS FFR Austin 4x4 Mks I and II  
  P10x Station Radio C45/C45/R209 Mk 2 in Truck 3 ton GS Cargo Bedford RL (Btty Cmd Post, RA)  
  Q11x Station Radio D11/R230 (or R234) in 1 ton Truck  
  Q12x Station Radio D11/230 (or R234) in air-portable container  
  Q13x Wireless Set No 53-R209 in Truck 3 ton GS Wireless HP  
  Q16x Wireless Set No 53-R209 MkII in Truck 1 ton GS Mk II  
  Q19x Wireless Set No 53-R209/C11-R210 in Truck 1 ton GS Signals Mk 2  
  Q20x Station Radio C11-R210/C42/C45/BE201/R209 in Truck 3 ton GS Signals Mk 2  
  Q23x Station Radio D13/R234 in air-portable containers  
  Q24x Station Radio R234 (x4) in Transporatable Container (TAVR)  
  Q28x Station Radio D11/R234 in Transportable Container on Truck 3 ton GS  
  Q29x Station Radio D11 (x3) in Transportable Container on Truck 3 ton GS  
  Q30x Station Radio R234 (x4) in Transportable Container on Truck 3 ton GS  
  Q42x Wireless Set No 53 in Truck 3 ton GS Command HP  
  Q51x Radio Station, Truck Mounted, R Type B Mk 2  
  Q62x Station Radio C50 Trailer mounted  
  Q64x Station Radio C50 in Transportable Container, Terminal Relay Station  
  Q65x Station Radio C50 in Carrier, Communication, Full-tracked  
  Q67x Station Radio C70 or C41/R222 in Transporatable Container  
  R16x DF Station, DFP5  
  R40x Truck 1-Ton, G.S. Radio, Light, MK 2, Signal Centre, Light  
  R41x Truck 3-Ton, G.S. Signals, MK 2, Signal Centre, Medium  
  R60x Telegraph Relay Station, Semi-Automatic, 10, 15 or 22 Lines  
Test and Meansurement  
  EMER Equipment Remarks
  B00x VVM general  
  B01x AVO 12 Heavy duty  
  B02x MM CT 498A & CT 498(Avo SX)  
  B03x AVO multiminor Mk.2 & 4  
  B08x AVO heavy duty 18 range  
  B09x AVO heavy duty 8s,28 range  
  B20x Solartron 1240  
  B26x MM electronic CT 569 & 569A  
  B28x MM CT 471,471C  
  B29x Test instrument electronic Nr.1  
  B51x VDM Fairey type A  
  B55x Impedance bridge No.1 Mk.1,1*,2,3  
  B56x VVM No.3  
  B58x HP Voltmeter set electronic 419A  
  B59x V.M set Marconi TF 2600 & TF 2600/S  
  B60x V/M set CT88,CT89  
  B62x V/M set electronic Marconi TF 2603  
  B63x Electrometer Pitman 43337  
  B65x V/M RMS HP 3400A  
  B71x V/M digital CT 470  
  B73x V/M digital Solartron LM 1619  
  B75x Multimeter digital 1041M  
  D01x 1-1000c/s calibrator  
  D03x Calibrator, Crystal, No. 7 (also Z63x)
  D30x TF 1417A Frequency counter  
  D31x Counter CT463 (also F75x, Z22x)
  D33x Freq. Counter CT576A  
  D35x Racal 9522 counter  
  D60x Freq. measuring Schomandl LFD1  
  D63x Wavemeter, Type WM 16/1 (also Z11x)
  D64x Frequency meter SCR-211 (also Z25x)
  D65x Wavemeter, Standard, No. 2 (also Z21x)
  D66x Wavemeter, Class D No. 2  
  D67x Wavemeter, No.4 Mk.1  
  D68x Wavemeter, Nos. 5, 6, 8 (also Z09x)
  D69x Freq. Standard CT437  
  E20x Dummy load 36Kw  
  E23x Equipment unknown  
  E41x Test set RF power  
  E43x Wattmeter absorption SHF No.1  
  E46x Material Quality Assessment principles and Practices (renumbered E69x)
  E69x Material Quality Assessment principles and Practices  
  F01x Signal Generator CT572/2 & Marconi TF2002  
  F02x Signal Generator TF2002B  
  F04x Signal Generator CT452A  
  F06x Signal Generator No. 8 (also Z42x)
  F08x Signal Generator Marconi TF1060/3S  
  F09x Signal Generator CT394B  
  F13x Signal Generator TF1370/1370A  
  F15x Oscillator test No.2  
  F17x Signal Generator No. 12 & 12/2  
  F20x Signal Generator No. 16 (also Z48x)
  F22x Signal Generator FF1168  
  F24x Signal Generator No. 18 (also Z46x)
  F25x Signal Generator AM/FM Marconi TF1066B/6S Conflict
  F25x Signal Generator No. 5 Mk.1 Conflict
  F26x Signal Generator No. 10 (also Z43x)
  F27x Calibrator O/P Sig.Gen.No.1  
  F28x Calibrator O/P Sig. Gen No.3  
  F29x Calibrator O/P Sig.Gen.No.5  
  F30x Calibrator O/P Sig. Gen No.6  
  F31x Synthesiser FSD 120S & M  
  F32x Synthesiser CT 562/111  
  F34x Signal Generator CT561/3  
  F51x Signal Generator CT500  
  F54x Test set pulse pattern  
  F60x Generator noise X band  
  F70x Oscillator wide- range Siemens 3W221A2A  
  F71x Test Oscillator CT 365 (also Z77x)
  F72x Test Oscillator Airmec 254  
  F74x Oscillators, Video, No.2 and No.3 (also Z76x)
  F75x Counter CT463 (also 031x, Z22x)
  F75x Signal Generator, Video Frequency, No. 1 (also Z72x)
  F76x Signal Generator Muirhead D890  
  F77x Oscillator modulator unit Siemens  
  F79x Signal Generator Wayne Kerr S501  
  F80x Oscillator ULF Dawe 445A  
  F81x Signal Generator 2 tone CT604  
  F84x LF O/P amp ALF120  
  H01x Oscilloscope CT531  
  H03x Oscilloscope CT538  
  H05x Oscillograph sel SE2000/12  
  H07x Oscilloscope CT436/13A (also H08x)
  H08x Oscilloscope CT436/13A (also H07x)
  H09x Pulse amplifier No.1  
  H15x Oscilloscope, Type CT 386A (also Y06x)
  H18x Oscilloscope CT536A  
  H20x Oscillator OS2200A  
  H23x Oscilloscope CT250A/52  
  H24x Oscilloscope Cossor 4100A  
  H25x Oscilloscope Tetronix D755  
  H40x HF Spectrum analyser 1094A/S  
  H42x Spectrum analyser TF2330/2330A  
  H50x Meter set modulation TF2300S  
  H51x Test set deviation FM No.3  
  H52x Meter set modulation CT452  
  H54x Test set modulation Airmec 210  
  H55x Test set modulation 409, 409.2  
  I01x Bridge set universal CT 530  
  I03x Bridge Meggers (also W66x)
  I05x Bridge Impedance No.1  
  I06x Bridge Universal CT 35  
  I08x Bridge Impedance No.3  
  I11x Bridge Evershed & Vignolles V3220  
  I12x Bridge reflection coefficient  
  I33x Test set Insulation Airmec 251  
  I41x Test set safety CT 582/3  
  I42x Wee megger  
  I44x Test set Insulation 40KV CT 91 (also W34x)
  I45x Test Set Continuity, Wireless Control Harness Equipment (also X51x)
  I46x Tester Insulation IT30,CT 587/3  
  I80x Wobbulator CT 501  
  J02x Test Set Transistor, CT 446 (also Y80x)
  J03x Curve tracer transistor CT71  
  J10x Tester automatic exchange relay set  
  J41x Crystal Test Set, Type AM 193 (also Z68x)
  J42x Calibrator, Crystal, No. 10 (also Z64x)
  J60x Microphone/receiver test set No.4  
  L01x Test Set Telegraph, Distortion and Margin No.1 (also X26x0
  L02x Test Set Telegraph, Distortion and Margin No.2. (also X24x)
  L06x Margin tester  
  L20x Test set cable  
  L24x Test Set Line No. 1 (also X84x)
  L40x DB meter portable No.3  
  L41x DB meter portable No.4  
  L42x Tester, Transmission Measuring Set, No. 1 & 2  
  L43x Tester, Transmission Measuring Set, No. 8 (also X08x)
  L46x Level meter Siemens 3D344A2A  
  L62x Attenuator variable 122db,60 ohm+F24  
  L63x db conversion tables  
  L64x Attenuator tapped CF No.1 Mk.3&4  
  L65x Attenuator Variable RF No 5 (also X70x, X73x)
  L66x Attenuator fixed 5825-99-592-6544  
  L83x Test set suppression No.3 (also X48x)
  L83x Kits testing suppression No.1  
  L84x Dummy aerials No.2 & 3  
  M01x PSU & breaker electronic  
  M02x PS elec. full wave 0-40v  
  M04x Adaptor test unit (also M27x)
  M06x PS Solartron AS 1165  
  M07x PS rectifier type  
  M08x Circuit breaker electronic  
  M09x PS rectifier 40V 50A  
  M14x Test kit Abbot comm. system  
  M15x Kits vehicle/manpack testing  
  M16x Test kit radio A40/1/2  
  M17x Test rig vehicle radio  
  M18x Test kit radio SR A13  
  M19x Test kit radio A43R  
  M20x C41/R222 test kit  
  M21x SR D11/13 R330/4 test kit  
  M22x Test kit radio SR A70  
  M23x Test kit radio SR C50/R236  
  M25x Test kit wireless inst. F.T.1  
  M26x Test set F.T.2  
  M27x Adaptor test unit (also M04x)
  M28x Test set sound ranging No.2  
  M29x Test set radio amp. R.F No.7  
  M30x Calibrator DC 123S  
  M30x Test kit radio SRA 13 (re-issued?)
  M31x Test kit radio SR A14 (also M33x?)
  M31x Cages screening portable No.2  
  M32x Test kit Amp. RF No 12 Mk.1&2  
  M33x Test kit radio SR A14 (also M31x?)
  M34x Test kit radio 678-P1  
  M35x Test kit radio 678Z-1  
  M36x Test kit radio UK/PRC-318  
  M37x Adaptor test set CT579 (also N03x)
  M38x Test rig /controller No.1&2  
  M38x Fluxmeter No. 1 (WY0023) (also W75)
  M39x ATE Clansman/Larkspur  
  M40x Test kit radio SR C70  
  M41x Adaptor test set SR C70  
  M42x Test set UK/PRC-316  
  M43x Test set telegraph adaptor TM430  
  M47x Test kit radio UK/RT-321  
  M48x Test set adaptor telegraph radio low/high  
  M49x Stopclock, Millisecond, Type TSA 1014/ABC (also Z20x)
  M51x Test kit Pye  
  M54x Cages screened transportable No.2 (also N31x)
  M63x Seal testing  
  M67x Clansman harness inst. Test system  
  M72x STT gear Clansman  
  N01x Modulator Marconi TF 1102  
  N03x Adaptor test set CT579 (also M37x)
  N04x Adaptor unit  
  N05x Amp. wideband unit BPC type WA1157  
  N09x Filter unit mains No.11  
  N31x Cages screened transportable No.2 (also M54x)
  W02x Instruments, Testing, Avometer, Universal, 46-Range Mks 1 and 1/1, 50-Range Mks 1 and 2 and No 7 Panclimatic  
  W03x Voltmeter, Portable, A.C./D.C., 0-15, 0-30V R.M.S., Thermocouple, No. 1  
  W09x Instrument, Testing, Avometer, Model 8S, 28 Range  
  W10x Multimeter Set, Avo, Model 9SX  
  W12x Instrument, Testing, Avometer, Heavy Duty, 18 Range  
  W22x Instrument, Testing, Electronic, Multi-Range, No. 1  
  W25x Testers, Insulation  
  W26x Megohmeter, Set, Ranges 5-150V 0-300Mohm  
  W34x Test set Insulation 40KV CT 91 (also I44x)
  W39x Measuring Set, High Resistance, No. 1  
  W46x Bridge, Test, Avo, No. 1  
  W47x Bridge, Test, Avo, No. 2  
  W49x Bridge, Universal, CT 375  
  W52x Bridges, Impedance, No. 1 (became Y40x?)
  W54x Bridge, Impedance, No. 5 (also Y40x)
  W60x Bridges, Capacitance, Electrolytic, No. 2  
  W61x Reforming Unit, Electrolytic Capacitor, No 1  
  W66x Bridge Meggers (also I03x)
  W69x Tester, Resistance, Earth, No. 1  
  W72x Tester, Bonding, Type B  
  W75x Fluxmeter No. 1 (WY 0023) (also M38)
  W79x Solartron VP250, Technical Handbook, Data Summary  
  X02x Decibel Meter, Portable, No. 3 (also X07x)
  X03x Tester, Transmission Measuring Set, No. 1, Mk.2  
  X05x Tester, Transmission Measuring Set, No. 3  
  X07x Decibel Meter, Portable, No. 3 (also X02x)
  X08x Tester, Transmission Measuring Set, No. 8 (also L43x)
  X09x Tester, Transmission Measuring Set, No. 9  
  X11x Measuring Set, Insertion Loss, Frequency Selective, No. 1 (renumbered X12x)
  X12x Measuring Set, Insertion Loss, Frequency Selective, No. 1  
  X14x Decibel Meter, Portable, No 4  
  X22x Tester, Relay and Distortion Measurement,  
  X23x Test Set Telegraph, Distortion and Margin No.2. (renumbered X24x?)
  X24x Test Set Telegraph, Distortion and Margin No.2. (also L02x)
  X26x Test Set Telegraph, Distortion and Margin No.1 (also L01x)
  X27x Test Set Telegraph, TF 1167  
  X39x Locator, Line and Cable Fault, No. 1  
  X41x Locator, Cable Fault, Pulse Operated, No. 1  
  X48x Test set suppression No.3 (also L83x)
  X50x Simulator, Transmitter/Receiver, Radio (ZD 04642)  
  X51x Test Set Continuity, Wireless Control Harness Equipment (also I45x)
  X55x/1 Apparatus, Seal Testing  
  X56x/1 Apparatus Drying Tels Equipment  
  X59x Test Set Microphone and Receiver, No. 3  
  X67x Oscillator, Alignment, Crystal Filter, No. 1  
  X70x Attenuator Variable RF No 5 (also L65x, X73x)
  X71x Dummy Load, WS31 and possibly WS88 (also X71x) (also Y27x)
  X73x Attenuator Variable RF No 5 (also L65x, X70x)
  X75x Attenuators, Tapped, C.F., No 1, Mk 3 and Mk 4  
  X80x Measuring Set, Crosstalk, No. 1  
  X83x Monitor, Telegraph, Distortion 10-Circuits, No.1  
  X84x Test Set Line No. 1 (also L24x)
  X85x Test Set Line No. 2  
  Y02x The Cathode-Ray Oscilloscope  
  Y04x Oscillographs, Cathode Ray, No. 1, Mks. 1, 1* and 2 (became Y80x/1)
  Y05x Oscilloscope, Type 13A (also Y80x/4)
  Y06x Oscilloscope, Type CT 386A (also H15x)
  Y08x Oscilloscope CT436  
  Y09x Oscilloscope Alignment, VHF, TF1104  
  Y10x Oscilloscope CT536  
  Y11x Voltmeter, Valve, No. 3 (also Y42x?)
  Y12x Oscilloscope, Miniature, Portable, No.1 (also Y82x)
  Y16x Oscilloscope, Type BC 1060A  
  Y19x Oscilloscope, High Speed (also Y81x)
  Y20x Amplifier Pulse No. 1  
  Y21x Attenuators High Voltage Equipment CT 117  
  Y24x Modulator, Amplitude, Marconi Type TF 1105  
  Y25x Meter, Circuit Magnification, No.1 (also Y50x)
  Y26x "Q" Meter  
  Y30x Meter Q Resonator Cavity S and X Band No 1  
  Y34x Analyser, Spectrum, H.F. 3 to 30 Mc/s (Marconi Inst. OA1094)  
  Y37x Dummy Load, WS31 (also X71x/2)
  Y39x Voltmeter, Valve, 150V, No. 1  
  Y40x Voltmeter, Valve, No. 2, Mks. 1 and 1/1  
  Y40x Bridge, Impedance, No. 5 (also W54x)
  Y40x Bridges, Impedance, No. 1, Mks. 1, 1*, 2 and 3 (was W52x?)
  Y42x Voltmeter, Valve, No. 3 (also Y11x?)
  Y45x Amplifier, Wide Band, BPL Type WA 1157  
  Y46x Voltmeter, Electronic, CT527  
  Y50x Meter, Circuit Magnification, No.1 (also Y25x)
  Y51x Meter, R.F., Radiation Power, CT477  
  Y52x Meters, Output Power, Nos. 1, 2, 3 and 5  
  Y57x Wattmeter, Absorption, A. F., No. 1  
  Y59x Wattmeter, Absorption, CT 417  
  Y60x Wattmeter, Absorption, R.F., CT401  
  Y61x Frequency Meter SCR-211-M.R. and T.  
  Y61x Wavemeter, Class D No. 1, Mks 2 and 2/1 (was Z17x)
  Y61x Wattmeter, Absorption, CT 419 ?
  Y61x Wavemeter, Class D No. 2  
  Y62x Wattmeter, Absorption, H.F., No. 2  
  Y63x Wattmeter, Absorption, 10/500mW  
  Y63x/3 Test Set Deviation, No. 2  
  Y64x Wattmeter, Absorption, CT330 and Calibrator, Voltage, CT  
  Y65x Wattmeter, Absorption, TF1020A/4M1 and TF1020A/5M1  
  Y67x Wattmeter, Absorption, S.H.F., No. 1  
  Y72x Aerials, Dummy, Nos. 2 and 3  
  Y73x Dummy Load for Wireless Set No. 31  
  Y74x Dummy Load for Wireless Set No. 88  
  Y75x Test kit radio B70  
  Y78x Test Set Frequency and Power, SHF No. 1  
  Y79x Wavemeter, S.H.F., 4550-4855Mc/s  
  Y80x Oscilloscope, Type BC 1660 (or BC 1060A) Conflict
  Y80x Test Set Transistor, CT 446 (also J02x)
  Y80x/1 Oscillographs, Cathode Ray, No. 1, Mks. 1, 1* and 2 (was Y04x)
  Y80x/4 Oscilloscope, Type 13A (also Y05x)
  Y81x Oscilloscope, High Speed (also Y19x)
  Y81x Testers, Valve, Avo Conflict
  Y82x Oscilloscope, Miniature, Portable, No.1 (also Y12x)
  Y85x Decade Air Condenser, 1100UUF  
  Z02x Wavemeter, No. 1  
  Z03x Wavemeter, No. 4, Mk. 1 Conflict
  Z03x Wavemeter, No. 2 Conflict
  Z08x Wavemeter, No. 4, Mks. 1 and 2  
  Z09x Wavemeter, Nos. 5, 6, 8 (also D68x)
  Z10x Signal Generator, Portable, Avo, No. 1 (also Z31x)
  Z11x Wavemeter, Type WM 16/1 (also D63x)
  Z11x Oscillators, Beat Frequency (renumbered Z70x)
  Z12x Wavemeter, No. 11  
  Z15x/1 Oscillator, Test, No. 1 (also Z34x)
  Z15x/2 Oscillator, Test, No. 2 (also Z35x)
  Z17x Wavemeter, Class D No. 1 (became Y61x)
  Z18x Wavemeter, Class D No. 2  
  Z20x Stopclock, Millisecond, Type TSA 1014/ABC (also M49x)
  Z21x Wavemeter, Standard, No. 2 (also D65x)
  Z22x Counter CT463 (also D31x, F75x)
  Z25x Frequency Meter SCR-211 (also D64x)
  Z27x Frequency Measuring Eqipment, Schomandl FD1FDM1  
  Z30x Oscillator, Avo, No. 1  
  Z31x Signal Generator, Portable, Avo, No. 1 (also Z10x)
  Z32x Signal Generator, Portable, Avo, No. 2  
  Z34x Oscillator, Test, No. 1 (also Z15x)
  Z35x Oscillator, Test, No. 2 (also Z15x)
  Z37x Oscillator, Frequency Swept, XT501  
  Z38x Signal Generator No. 1, Mks.1 2 and 2*  
  Z39x Signal Generator No. 2  
  Z40x Signal Generator No. 5 Mks, 2/3 and 3  
  Z41x Signal Generator No. 5, 6A, 6B, 6C, and 6D  
  Z42x Signal Generator No. 8 (also F06x)
  Z43x Signal Generator No. 10 (also F26x)
  Z44x Signal Generator No. 12  
  Z45x Signal Generator No. 13  
  Z46x Signal Generator No. 18 (also Z42x)
  Z47x Signal Generator No. 15  
  Z48x Signal Generator No. 16 (also F20x)
  Z49x Generator, Signal, Set TF 1168  
  Z50x Signal Generator CT481  
  Z52x Signal Generator, Set, FM/AM (TF 995A/S)  
  Z53x Calibrator, Output, Signal Generator, No. 1  
  Z54x Calibrator, Output, Signal Generator, No. 3  
  Z56x Calibrator, Output, Signal Generator, No. 5  
  Z57x Calibrator, Output, Signal Generator, No. 6  
  Z58x Calibrator Set, Attenuator, CT93  
  Z61x Calibrator, Frequency, CT432 Set (reissued)
  Z61x Calibrator, Crystal, No. 5 Mk.1  
  Z62x Calibrator, Crystal, No. 6, Mk. 3  
  Z63x Calibrator, Crystal, No. 7 (also D03x)
  Z64x Calibrator, Crystal, No. 10 (also J42x)
  Z65x Calibrator, Crystal, Set  
  Z66x Generator, Set, Double Pulse, CT434A  
  Z68x Crystal Test Set, Type AM 193 (also J41x)
  Z69x Test Set Crystal No. 330  
  Z70x Oscillators, Beat Frequency  
  Z72x Signal Generator, Video Frequency, No. 1 (also F75x)
  Z74x Attenuator Variable, CT421  
  Z75x Generator, Signal, TF1370  
  Z76x Oscillators, Video, No.2 and No.3 (also F74x)
  Z77x Test Oscillator CT 365 (also F71x)
  Z80x Test Set I - 56  
  Z81x Test Set Deviation, F.M., No. 1  
  Z82x Test Set Deviation, F.M., No. 1A  
  Z83x Test Set Deviation, No. 2  
  Z84x Test Set Deviation, FM, No. 3  
  Z85x Receiver, Ratio Tracing, Technical Handbook, Data Summary