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Old 14th May 2021, 8:55 pm   #9
Join Date: Jun 2007
Location: Coulsdon, London, UK.
Posts: 1,384
Default Re: Wartime civilian receiver what to replace Westector with ??

Apologies for the confusion.
After studying it further I realise the Westector is forward biased.

Although it has +8.6V on the cathode, the Anode is +12.6V.

If I take the 47k and 330k series resistors into account, the forward bias current seems to be about 10 microAmps.

That should be no problem for an OA70.
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