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Frank's electron Tube Data sheets RGD 1050C  

Radio Grammophone Development
Circuit diagram (partly drawn in pencil...)
The rear side of the radio.
The receiver and amplifier are two units.
The top side of the radio
Here is how I found it...
An old shed in Schotland (1988).
Something went wrong...
The LF amplifier
with PX4 (=PP3/250) tubes
Bottom view