Screen Taps on Sunn Model T - diyAudio
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Old 22nd April 2013, 08:17 PM   #1
diyAudio Member
Join Date: Feb 2009
Default Screen Taps on Sunn Model T


I just started a build of a Model T, but with two power tubes. On top of that, I'm a bit short on money so I am using a non UL output transformer. I am curious as to how I can add a screen tap on the power supply.

I was thinking tacking a voltage divider on the plate tap oughtta do it, but am unsure of component values. The plate tap is going to be about 550v.

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Old 22nd April 2013, 11:38 PM   #2
Enzo is offline Enzo  United States
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Join Date: Sep 2004
Location: Lansing, Michigan
Look at most any other tube guitar amp schematic. Fender made a few UL amps, but the vast majority were not. On your old drawing, you would simple put another node between nodes A and B on the B+ string.

But look at the Fender version of the Sunn Model T from 1998. That is a conventional screen supply amp.

Most tube amps in the guitar world are not UL types. and the power supplies are all just about the same, check a few out.
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