[Milsurplus] BC-474A Receiver Conversion

[David Stinson]

One tip for anyone hoping to get a 474 receiver working:
Like many battery operated sets, do NOT ground the B-.
B- floats to give bias to the audio output stage.
Grounding the RX B- will instantly destroy the audio
output transformer by opening the primary.
That's why 90% of the 474s you see have open transformers.
While an "ARC-5" output transformer is not a "good" 
substitute, it is readily available and does work.
Tight fit but can be done.

Oh... and if I had such a "conversion" document,
I'd burn it and scatter the ashes.  ;-)
73 Dave S.

-----Original Message-----
>From: Ian Wilson <ianmwilson73 at gmail.com>
>Subject: [Milsurplus] BC-474A Receiver Conversion
>
>I have a conversion of a BC-474A that includes what seems to be the original
>receiver, but modified to use indirectly heated tubes.....