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. Contemporary Marconi home entertainment equipment such as table radios and TV's will not be catalogued in order to maintain the purity of the listings.

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 bearing only Marconi's name. Canadian Marconi used letter/number combinations in their products while Marconi UK used trade names for their equipment.

15W2 Transmitter
100 W3 Transmitter
100W4 Transmitter
100W5 Transmitter
13470 Detector / 13460 Amplifier
11982 Portable Spark Gap Transmitter
119-723 PA Amplifier

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 SW 6A Receiver

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

75786 Spark Gap Transmitter

95309 Carrier Signalling 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

BH-30 Linear Amplifier

C2 Frequency Indicator
C8UA UHF Receiver
C12HA Console Speech Input Assembly
C-26 Limiting Amplifier
Common Oscillator Model 105-930
Components
CD-12 Transmitter Receiver
CH-25 and 26 HF SSB Transceiver
CM-11 Transmitter Receiver
CN-36U Marine Radiotelephone
CN 86 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-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
LTT-1 (Longwave Telegraph Transmitter)
LTT-4 Transmitter

Maggie Detector
MST Tuner/ MSA Amplifier

MDF-1 DF Set
MDF-3 DF Set
MDF-5 MFDF Set
MSL-5 Receiver
MU101 Tube Tester

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

Oscillator O-5018

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

RN-21 Receiver

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

TH-41 Transmitter
TH-41 Master Oscillator 148-017
TH-117 Transmitter
TM11 Transmitter
TMR-1-V Receiver
TR50RB Transmitter
TR-200RS Transmitter

WS 9 Set
WS-52 Wireless Set
XG54 and XG54G Series - HF Receivers

YSW-4A2 Shortwave Receiver

PATENT YEARS ON NAMEPLATES

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.

NEED INFORMATION

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.can provide info.

150PT3
200PT (LF transmitter?)
30PT5 HF Transmitter
3V-SW-8 HF Regenerative Receiver
4VNT1 Receiver (Hammond Radio Museum)
48031 10 watt Transmitter/Receiver circa 1936
400C
LP-21
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: jerry.proc@sympatico.ca

TRANSMITTER/RECEIVER versus TRANSCEIVER

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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