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Change date = 20080329 10:06:10
 
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EMERs by Number.

Notes:

   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.

Telecommunications

        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 E24
x)
        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 E23
x)
        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 K07
x)
        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 ampl
ifier
        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 (YA
8088)

        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. Ex
tension
 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, 4
0PR. 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. (CARR
FA)
        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       (reissue
d)
        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-R2
10/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, armou
red
        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, Adjuta
nt
        K51x    Station Radio C11-R210/C45/R209 in Saracen Mk 2, ACP, RA, CPO an
d 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 WS12H
P,
 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 Sign
als 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 to
n 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 Sta
tion
        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    (renumbe
red 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 X2
4x)
        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.         (renumbe
red X24x?)
        X24x    Test Set Telegraph, Distortion and Margin No.2.         (also L0
2x)
        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 Y04
x)
        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