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Old 14th May 2021, 7:50 pm   #8
Mr 1936
Pentode
 
Join Date: Mar 2017
Location: Romsey, Hampshire, UK.
Posts: 155
Default Re: Wartime civilian receiver what to replace Westector with ??

Hi

Looking at the Westector data sheet, the "knee" in the forward characteristic of a WX1 (single element) is at about 0.2 volts. The WX6 has 6 series elements so the 0.2 volts becomes 1.2 volts. I therefore find it quite surprising that in the WCR design the Westector is treated to 4V forward bias, pushing it well into a conducting state. I guess if it still conducts more in one direction than another then it still counts as a detector, albeit a rather "soggy" one. Maybe the designers found this gave the "best" performance.

If you replace with a single semiconductor diode, I suspect it would be happier with the forward bias reined in a bit or even reduced to zero.
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Last edited by Mr 1936; 14th May 2021 at 8:02 pm.
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