Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => EZ Board postings => Topic started by: Geezer on June 18, 2005, 06:43:00 am
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Hoffman Amplifiers
> Tube Amp Building - Tweaks - Repairs
> Hiss
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Leevi
Junior tube assistant
Posts: 144
(4/26/04 7:51 am)
Hiss
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What is typically causing hiss in the amp? In my case it comes
either from PI or power tubes. Microphonic tube, radio demodulation...?
/Leevi
Tiny Daddy
I will work on all amps
Posts: 637
(4/26/04 8:22 am)
Re: Hiss
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Usually noisy tube or noisy carbon comp resistor.
PHATamps
I only work on tube amps
Posts: 442
(4/26/04 5:35 pm)
Re: Hiss
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Also, the Vox-style long-tail pair PI tends to be quite a bit more hissy than the Fender/Marshall style for some reason, probably to do with higher plate current.
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