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Offline Tre

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on: July 30, 2012, 07:46:14 AM
Can someone explain the purpose of placing the secondary of the output transformer (now used as the plate choke) in the cathode circuit in what is now a parafeed amplifier?

What effect does that have?

It's on page 13 of this pdf.

http://www.nmr.mgh.harvard.edu/~reese/VALVE/valve199.pdf

Thanks

Tre'



Offline Doc B.

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Reply #1 on: July 30, 2012, 08:01:53 AM
It creates a local feedback loop at the cathode of the output tube. I did this to get a little more power out of the circuit.

Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.

Offline Tre

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Reply #2 on: July 30, 2012, 08:09:59 AM
Interesting.

Does it affect the inductance of the primary in any way?

Tre'
« Last Edit: July 30, 2012, 08:12:20 AM by Tre »


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