Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => EZ Board postings => Topic started by: Geezer on June 17, 2005, 08:49:35 pm
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Hoffman Amplifiers
> Tube Amp Building - Tweaks - Repairs
> ac30 plate voltage
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scole90
Junior tube assistant
Posts: 14
(2/9/04 2:22 pm)
ac30 plate voltage
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ive read posts saying ac30's, run the heck out of power tubes,what plate voltage does a typical ac30 run?
GroundhogKen
Forum Moderator
Posts: 2249
(2/9/04 3:12 pm)
Re: ac30 plate voltage
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I'd like to think 325V is the norm, but I bet some of them run as high as 340V or worse. The only reprieve is that you get to subtract the 10v-12v cathode voltage
Not only that, but real AC30s have the tubes buried inside the cabinet with just a couple of skinny vents.
It's a true torture chamber for EL84s.
Ken
6G6
Junior tube assistant
Posts: 74
(2/9/04 3:49 pm)
Re: ac30 plate voltage
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I've always wondered why it is so high.
Is that what it takes to get that Brian May, compressed, sustained sound?
What would it do at a relatively sane 280V?
scole90
Junior tube assistant
Posts: 15
(2/9/04 11:43 pm)
Re: ac30 plate voltage
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i think so, my spitfire is running the tubes at 352 volts but it sounds fabulous.
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