|Author:||Henry Ramsey (registered user: 2955 posts )|
|Date:||Wed, Apr 18th, 2012 @ 19:27 ( . )|
I'm trying a different approach. I rewired the second tube to the same 12V supply as the 12K5s.
They're powered from the CT. (I was thinking this was 12VAC for some reason, but it reads 12VDC. )
I have the 6V regulator now only powering a single tube, for now a 12au7, but I may go to another 6V tube such as an EF86 that needs 200mA or a pentode/triode like a 6U8A which uses 450mA.
Either way I've dumped some heat from the regulators. ;-)
I realised too I was getting close to 1.7A of current draw from the PT only rated for 2A. This change also drops 150mA from that. The PT was humming when I had it on last night and I suspect the high current draw is why. Isn't there a rule of thumb to not exceed 80% of a PT ampacity?
It's a 25.2VCT@2A transformer, btw from Radio Shack.
--* Something different
4/19/2012 @ 15:12--Merlin
4/19/2012 @ 18:38----Henry Ramsey
4/19/2012 @ 23:20----Henry Ramsey
4/20/2012 @ 04:19------Merlin
--------* 11.9VDC, 6VAC at CT
4/20/2012 @ 08:35--------Henry Ramsey
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