|Author:||Merlin (registered user: 4642 posts )|
|Date:||Sat, Apr 21st, 2012 @ 09:09 ( . )|
On 04/20/2012 @ 16:10, Henry Ramsey wrote :
From 4 to 5 on the 12A_7 heaters or pin 4 to ground.
: One comes from the CT the other is grounded.
Hmm, that is a very odd way of doing it! You're feeding the heaters with rectified (but un-smoothed) DC! The more logical (and presumably quieter) thing to do it to wire the heaters directly across the transformer winding (e.g., one heater between the end of the winding and the CT. Another heater between the other end of the winding and CT) not to ground.
--* 11.9VDC, 6VAC at CT
4/21/2012 @ 10:11--Henry Ramsey
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