Mic Kaczmarczik's TubeInformation - The Blue Guitar
Mic Kaczmarczik's TubeInformation - The Blue Guitar
Mic Kaczmarczik's TubeInformation - The Blue Guitar
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From power@wwdc.com Mon Jul 29 10:38:23 CDT 1996<br />
Article: 19657 of alt.guitar.amps<br />
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From: O'Connor<br />
Newsgroups: alt.guitar.amps<br />
Subject: Re: Tube Rectifier Replacement For Fender Amps<br />
Date: Mon, 29 Jul 1996 05:40:14 -0700<br />
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William R Rodrick wrote:<br />
if, for example, the amp in question is a Fender with a 6V6<br />
> output stage, replacing the tube rectifier with solid state rectifiers is<br />
> liable to fry the 6V6(s) because of the resulting increase in plate voltage;<br />
> Fender already runs them way over spec to begin with.<br />
><br />
> Bill<br />
Contrary to popular belief, Fender never operated 6V6s beyond their<br />
ratings. Most people are familiar with the 360V anode rating of the 6V6,<br />
but this is an old style rating called a "Design center value". This is<br />
a rating that has a built in allowance for variations in tube<br />
manufacturing, AND, it tries to anticipate variations in the application<br />
circuit.<br />
Later, the rating system was revamped to list "Design maximum values",<br />
where only the production variations were accounted for. <strong>The</strong> low 360V<br />
plate voltage then magically soared well above 400V with no actual change<br />
to the tube itself. <strong>The</strong> same was true for the 5881.<br />
With respect to the solid-state rectifier sub question: As long as the<br />
bias level is properly proportioned for the higher anode voltage, then<br />
6V6s are happy to work at B+ values above 420V.<br />
Note that the 6V6 was used in early TVs as a horizontal driver subject to<br />
1,200V at a 15% duty cycle. Don't try this with an EL84!<br />
Tinker carefully!<br />
Kevin O'Connor<br />
From Teleologist@Sorry.NoEmail Mon Jul 29 10:38:42 CDT 1996<br />
Article: 19660 of alt.guitar.amps<br />
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From: Teleologist<br />
Newsgroups: alt.guitar.amps<br />
Subject: Re: Tube Rectifier Replacement For Fender Amps<br />
Date: Mon, 29 Jul 1996 06:58:38 -0500<br />
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O'Connor wrote:<br />
><br />
> William R Rodrick wrote:
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