From PYLO–(at)–su.edu Tue Sep 19 11:35:02 CDT 1995
Article: 1494 of rec.audio.tubes
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From: PYLO–(at)–su.edu (Ruth and Dale VanZile)
Newsgroups: alt.guitar.amps,rec.audio.tubes
Subject: Re: Electrolytic cap problem in an Ampeg V-2
Date: Mon, 18 Sep 1995 19:08:09
Organization: Arizona State University
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In article <1995Sep15.171054.2665--(at)--tinews.tti.com> rei–(at)–oldev.tti.com (Reid Kneeland) writes:
>From: rei–(at)–oldev.tti.com (Reid Kneeland)
>Subject: Re: Electrolytic cap problem in an Ampeg V-2
>Date: Fri, 15 Sep 1995 17:10:54 GMT
>In article
>>At some point (depending on the availablity of 7027s)
>It’s pretty poor. Even Antique couldn’t come up with a matched
>quartet the last time I called. Too bad, because I doubt that
>6550s or KT88s will make as much power on 540V (somebody tell
>me if I’m wrong, it would be good news).
It’s not a problem. Use Sovtek’s 5881, and up the screen resistors to 1k/5W,
then adjust the bias to idle at about 30mA or so. They work great as subs for
7027/7027A with these conversions, as well as working great in place of 7581A
types…. Got this tip through Joe Pampel, who got it from Ed Pennypacker at
New Sensor. He claims that even after a year of service, he’s getting 96W out
of his V-4. They’re certainly cheaper than 7027s or most any NOS tube.
Damned tough, too….
Dutch
