Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: super&plexi on June 20, 2016, 08:54:09 pm
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Does anyone know of or have experience with an amp running hotter at a higher elevation. I'm usually around sea level but presently at around 6500 feet and noticed my rectifier tube gz34 glowing bright yellow on the plates and I don't think it usually does, at least that much. After playing about an hour the amp seemed abnormally hot, although the room temperature was a little warm to begin with. Wall AC was 121 and it's usually 119 -122. I haven't played the amp a lot in the past couple years, and do usually play it through a variac at about a hundred and ten, but definitely have played it without the variac in that time and don't remember it being this hot.
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Bright yellow on the plates is very wrong.
Thin air does mean less cooling, but not so you would notice (any altitude you can function at).