|Author:||Henry Ramsey (registered user: 2955 posts )|
|Date:||Fri, Apr 20th, 2012 @ 16:10 ( . )|
On 04/20/2012 @ 10:04, Merlin wrote :From 4 to 5 on the 12A_7 heaters or pin 4 to ground.
On 04/20/2012 @ 08:35, Henry Ramsey wrote :
: : Strange thing is the heater voltage reads 11.9VDC loaded with the one tube and only about 6VAC.
: Measured between where and where, and with what? If you have it wired up the way I think you do, then there is no DC in the heater, only AC.
One comes from the CT the other is grounded.
You asked for a schematic the other night. Here's just the power supply. I hope that makes things clearer. [link] Sorry for the mixed drawing, but I couldn't find schemtic diagrams for V-regulators.
It's derived from this schematic: [link]
I got the above schematic in PDF format from somewhere and I can't remember where.
Paul Fawcett found this website that seems to be a primitive version of the same thing: [link]
The power supply is slightly different without regulated plate supply and w/ series heaters. On the second page the schematic looks like Stephane's Sopht amp or an early version thereof.
--* 11.9VDC, 6VAC at CT
4/21/2012 @ 09:09--Merlin
4/21/2012 @ 10:11----Henry Ramsey
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