11-transistor broadcast band stereogram with BSR model A11 automatic record changer
Unusual, in that it was called the Princess Diana well before there was the Princess we know today as Diana.
Valves (11): BF184, BF184, AA132 Diode, BF184, AA138 Diode, (BC148C, AX1209, AC117, AC175) x 2 (Left and Right Channel), 1N3194 Power Rectifier Diode,
Intermediate Frequency: 455kc/s probably
Frequency Bands: 1
Chassis Notes(most schematics can be clicked to download a full size version)
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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