CMC Radio Listings

This is not an all encompassing list. Vacuum tube, radio related equipment which has been discovered to date is listed here. Some pre-vacuum tube era equipment has also found its way into the listings but there there are always exceptions to the rule.  As other equipment is discovered, it will be added to this listing.

Does anyone know if Marconi had any system of assigning the acronyms for equipment model numbers? The assigned model numbers do not have any apparent logic. As an example why is there no 'T' in the model PV-500 transmitter and no 'R' in the MSL-5 receiver? Note that Canadian Marconi and Marconi UK were separate companies sharing Marconi's name.

15W2 Transmitter
100 W3 Transmitter
100W4 Transmitter
100W5 Transmitter
108-944 Receiver (RN21 relative)
1216 Spark Gap Transmitter
11982 Portable Spark Gap Transmitter
119-723 PA Amplifier
13470 Detector / 13460 Amplifier
13939 MCW transmitter

200PT Transmitter
2843 Receiver
2846B Receiver
2848 Receiver

332/333 Autoalarm Receiver
34160 Portable Trouble Finder
3V-DR-3  Beacon Receiver
3V SW 7 Receiver
3V SW-8 Receiver

4V NT 1 Receiver
4V SW 5A Receiver
4V SW 6A Receiver

5VP4-37560 Receiver
50 WQG Emergency Transmittter
500 WM3 Transmitter

75786 Spark Gap Transmitter

843 Receiver
844 Receiver

95309 Carrier Signalling Equipment

A39865 Station Monitoring Equipment
AN/FRT-501 Transmitter
AR-2/AR-6 Receiver  RCAF (12 volt/24 volt )
AR4 Portabale Receiver
ATR1-A Transmitter
AT-1/ AT-7 Transmitter RCAF (12 volt/24 volt )
ATR-5 Transmitter-Receiver
ATR-11 Transmitter Receiver

BH-30 Linear Amplifier
B40078 Station Monitor

C2 Frequency Indicator
C8UA UHF Receiver
C12HA Console Speech Input Assembly
C-26 Limiting Amplifier
Common Oscillator Model 105-930
CD-12 Transmitter Receiver
CH-25 and 26 HF SSB Transceiver
CM-11 Transmitter Receiver
CN-25T Transmitter Receiver
CN-36U Marine Radiotelephone
CN 86 Seaway Marine Radiotelephone
CN 414-2 Marine Radiotelephone
CN 438-2 Marine Radiotelephone
CN 495-2 Marine Radiotelephone
CS-11 Portable Radiotelephone
CS-25 Portable Radiotelephone (ala SPF)
CSR-1 Receiver
CSR-2 Receiver
CSR-3 Receiver
CSR-4 Receiver
CSR-5 Series Receiver
CSR-5Y and Diversity Reception

DN-16 VHF Marine Radiotelephone
DT-65 Mobile Radio

FR-12 Transmitter-Receiver

G3  R.D.F. Receiver
GP-15 Transmitter/Receiver
GT-14  (RCAF version of PV500L)

Instructional Transmitter and Modulator

LCS-5 Transmitter
LFR-2SB Receiver
LG-17 Ionospheric Recorder
LTT-1 (Longwave Telegraph Transmitter)
LTT-4 Transmitter

Maggie Detector
MST Tuner/ MSA Amplifier

MDF-1 DF Set
MDF-3 DF Set
MP 1 Manpack Radio
MSL-3 Receiver (Need info)
MSL-4 Receiver
MSL-5 Receiver
MU101 Tube Tester

No. 11 Wireless Set
No. 19 Wireless Set
No. 19 Wireless Set Linear Amplifier

Old Radio Components
Oscillator O-5018

P-1000 Linear Amplifier
PF1-x Transmitter Receiver (aka CS-25 and SPF)
PN1-x Transmitter/Receiver
PRS1 Portable Transmitter/Receiver
PV-500H HF Transmitter Series
PV-500L  LF Transmitter Series

RN-21 Receiver
Rotary Spark Gap Transmitter #1
RT 8027 Receiver/Transmitter(?)

SMR-3 Receiver
SPF Transmitter/Receiver ( See CS25 or PF-1)

T49-15 Receiver / Transmitter
TH-41 Transmitter
TH-41 Master Oscillator 148-017
TH-117 Transmitter
TM11 Transmitter
TMR-1-V Receiver
TMR2 Receiver
TR50RB Transmitter
TR-200RS Transmitter
Tuners -  200 to 600 Metres

Wavemeter MW5-44770
Wavemeter - 180 to 650 metres
WS 9 Set
WS-52 Wireless Set

XG54 and XG54G Series - HF Receivers

YSW-4A2 Shortwave Receiver


Some of the nameplates on Marconi equipment contain several patent dates. The rightmost year is the patent year of the device. Any dates to the left of it indicates that the equipment employs elements in the design that are protected by patents from other years. The earlier patents could be related to the method of winding an I.F. transformer, a specific circuit design, the composition of a carbon resistor or the plating on the chassis but definitely does not apply to the whole device.


The following equipment has been discovered in various documents. Identification of these devices is being solicited since they lack photos and data. Please contact jerry.proc@sympatico.if you can provide info.

200PT (LF transmitter?)
30PT5 HF Transmitter

48031 10 watt Transmitter/Receiver circa 1936
LP 200-PT1
STT-4 HF Transmitter (Shortwave Telegraph Transmitter)
TH-39 LF transmitter
TH-58 Transmitter
TR600 Radiophone Transmitter
TR800/800B HF Transmitter

If anyone can provide information please contact:


Sometimes the line between a receiver/transmitter and a transceiver is a blurry one. Typically a transmitter/receiver is packaged in a common enclosure and both devices share a common power supply. In the odd case, perhaps an audio amplifier stage might be shared. In a transceiver, the same circuits are shared for both reception and transmission and are fed with a common power supply. The ARRL stated that a Transceiver is a trade name coined to describe a combined transmitter-receiver as manufactured by the Chicago Radio Laboratory of Chicago, Illinois, around  1920.

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