Re: GEC BRT400D Communications Receiver
Hello Ian,
I have heard that the audio quality of these sets was so good that the BBC was able to re-broadcast transmissions using this receiver.
The AGC circuit is unusual in that it has DC amplification. Most sets have a simple diode.
There should be a paxolin panel on top of the mains transformer containing some power resistors and the mains voltage selector links. This has a second panel on top with ventilation holes. On all examples I have seen, the paxolin is burnt black and crumbling away. If yours is in good condition, it has probably not seen much use.
If your set is a table model, it is worth checking that the blanking plate is fitted inside the left hand side hand hold cast into the side panel. (I don't mean the chrome handle on the front panel.) This plate was added to later sets to prevent finger contact with the mains selector links when lifting the set while running. Please ask if my description is not clear enough.
Andrew
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