Solid State Stereogram with 12 transistors. 4 band reception.
Cabinet designed and built by G. C. Goode in Auckland.
Valves (12 transistors, 3 diodes): AF136, AF136, 2N1524, 2N1524, AA111 Diode, 2N2613, 2N2613, 2N2953, 2N2953, 40050, 40050, 40050, 40050 and 2 x 40266 Rectifier Diodes
Frequency Bands: 4
Chassis Notes(most schematics can be clicked to download a full size version)
Service information Murphy_SG1230_and_SGA1231_schematic-converted.pdf
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)