Small signal parafeed transformer

vetmed · 2923

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Offline vetmed

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on: September 02, 2020, 04:57:28 PM
What if any would be the virtue of taking the ground  return lead to the top of cathode resistor? I'm looking at something I built more than 20 years ago and wondering why I did it ::) It works but then I was just following a schematic with little real understanding of what I was doing :o Hopefully I have made myself understood and appreciate any input.
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Robert Lees

Robert Lees

Offline 2wo

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Reply #1 on: September 02, 2020, 05:16:33 PM
Have a look at the "Valve" archives there were a few articles on parafeed theory, if I recall correctly there was one on the four ways to connect and the pluses and minuses of each...John

John S.

Offline Paul Joppa

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Reply #2 on: September 02, 2020, 06:21:38 PM
It gets the signal current out of the cathode bypass capacitor.

Paul Joppa

Offline vetmed

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Reply #3 on: September 03, 2020, 05:34:20 AM
Thanks, I found one article in valve magazine entitled 12 Ways to parafeed.  It showed the 12 ways but offered little explanation, so your response save a lot of searching :)

Robert Lees

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