MURPHY CM77 (CIRCA 1967)

The Murphy CM77 was manufactured for Fisher & Paykel Ltd by Allied Industries Ltd (Fisher & Paykel) in about 1967.

7-transistor mantle radio with record player input

 

Technical Information

Valves (7 transistors, 2 diodes): 2SA52, 2SA49, 1N60 Diode, 2SA53, 1N60 Diode, 2SB54, 2SB54, ( 2SB189 x 2 Output Pair)

Intermediate Frequency: 455kc/s

Frequency Bands: 1

Chassis Notes(most schematics can be clicked to download a full size version)

1967 Murphy CM77

1967 Murphy CM77

1967 Murphy CM77

Service information (Murphy_CM77_Service_Document.pdf) here

General Construction Notes for Allied Industries Ltd (Fisher & Paykel):

Murphy stereogram model prefix indicates radio bands - ie: SGA is Stereogram All-Wave, SGD is Stereogram Dual-Wave. SG means Stereo broadcast band radio only (stereo referring to the record player - radio was only mono. Dashes and spaces seem to be used in some places while not others - ie: SG1387 is the same as SG 13-87

Dating Murphy equipment is a little difficult due the codes not making much sense to the author.  Here is what can be seen from the models examined:

SGx61x (ie SG615, SGD618) radiograms seem to have run from 1959 through until 1961/62 and used Garrard Type A record changers (these were released approximately 1959)