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Frank's electron Tube Data sheets RGD 1050C  

Radio Grammophone Development
Circuit diagram (partly drawn in pencil...)
the on-line RGD museum
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