8-transistor portable radio
Valves (8 transistors, 2 diodes): 2N1637, 2N1526, 1N60 Diode, 2N1524, 2N1524, AA112 Diode, 2N408, AC117, ( AC117 x 2 matched output pair)
Intermediate Frequency: 455kc/s
Frequency Bands: 1
Chassis Notes(most schematics can be clicked to download a full size version)
Note, this set has no audio output transformer and instead uses a 30 ohm centre tapped voice coil which most likely not be replacable with any modern speaker so treat this with care.
Service information (Murphy_P88_Super_8_transistor_radio_service_information.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 appearing to contain dating info. 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)
The first digit or digits seems to reflect the number of active devices (ie: SG 14-32 has 14 transistors, SG615 has 6 valves)
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