Choke versus resistor for power filtering

Express, Liverpool, Rocket, Dirty Little Monster, etc.

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thomasks
Posts: 14
Joined: Sun Jan 01, 2023 4:14 pm

Choke versus resistor for power filtering

Post by thomasks »

Guys,
I have read, that people feel a choke on the power board would sound better than the resistor that is in the express schematics/layout.
My question is, does the choke go in the circuit in place of the 1K 25W resistor on the power supply board, just ahead of the capacitor stack?

Thanks
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johnny riff
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Location: N.H. USA

Re: Choke versus resistor for power filtering

Post by johnny riff »

"better" is subjective. look at the rocket PS, a choke replaces
1k-25w R between the CT and screens. Try it, maybe marshall like.
Roe
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Joined: Thu May 31, 2007 2:10 pm

Re: Choke versus resistor for power filtering

Post by Roe »

thomasks wrote: Tue Mar 07, 2023 9:22 pm a choke on the power board would sound better than the resistor that is in the express schematics/layout.
no it sounds and feels far worse, esp with a normal choke (110ohms dc resistance instead of 1k)
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thomasks
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Re: Choke versus resistor for power filtering

Post by thomasks »

So I have a 3Hy, 250mA choke for a Marshall. Would I have to include a capacitor or another resistor in series with it? Are any additions needed to maintain the voltages?
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johnny riff
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Re: Choke versus resistor for power filtering

Post by johnny riff »

just the choke, again look at the rocket schem. I cant remember but ken used the 1k for a reason. Try it and report your findings.
Roe
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Re: Choke versus resistor for power filtering

Post by Roe »

thomasks wrote: Wed Mar 08, 2023 1:13 pm So I have a 3Hy, 250mA choke for a Marshall. Would I have to include a capacitor or another resistor in series with it? Are any additions needed to maintain the voltages?
try 890R in series to maintain voltage
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