R.G.D.   Radiogram Model P4 From 1931

Tuned Radio Frequency (T.R.F.) circuit design. Single loudspeaker. 

Single ended AC/P1 triode output. 

Form Radiogram
Price 48gns
Valves 5 incl rect 
O/P Stage Single Ended Triode 1.5w
Tuning Manual

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