• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Pentode filter

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hello all

I'm looking for a thread that I saw here (I think), about how to use a pentode to replace a choke coil in a filtering cellule. I can`t remember where I saw it and I can`t find it anywhere here or on Google.
Could anybody help me please?
Thank you
 
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