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6V6 PP power xfrmr
6V6 PP power xfrmr
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Old 9th May 2007, 08:17 PM   #1
cornman is offline cornman  United States
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Join Date: Oct 2005
Default 6V6 PP power xfrmr

6V6 PP power xfrmr

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I have been searching the web and different forums for a suitable replacement power transformer for a push pull 6V6 stereo integrated.
A few examples were, 275-0-275 @ 150mA (Hammond 270FX), 300-0-300 @150mA (Hammond 272FX), as well as going with 200mA.
Tube lineup is,4-6V6GT PP output, 5AR4 rectifier, 2-12AX7, 2-6EU7, 1-12AU7.

I just want to make sure I'm not going to be dealing with too much, or not enough plate voltage, as current rating seems to be fine.

Any recommendations or thoughts? I have downloaded PSU Designer2 which I'm sure will take me a while to figure out.

Here is a link to the AP-30 which is almost identical to the AP-35.

http://www.ampslab.com/SCHEMATICS/BogenAP30.jpg

I'm close but I don't see a cigar.

Thanks,
Chris
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Old 10th May 2007, 12:44 AM   #2
Eli Duttman is offline Eli Duttman  United States
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Join Date: Apr 2004
Location: Monroe Township, NJ
Chris,

If it will fit, go with the 250 mA. Hammond 272JX. Reserves of current are a good thing. I'd be very leery of anything smaller than the 200 mA. 272HX.

BTW, the hefty 6.3 VAC windings allow you the option to build a DC heater supply for the phono section heaters. That, in turn, means you can use the inexpensive, but GOOD, Sovtek 12AX7LPS in the phono positions.
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Old 10th May 2007, 07:48 AM   #3
cornman is offline cornman  United States
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Join Date: Oct 2005
Eli,

Thanks for current recommendation, that will definately help.

Judging by what I could come up with using PSUD II (still learning as I go), 300VAC would give me just under 350VDC on the plates of the 6V6's, which probably will push them to their max rating, yet should still be ok.

Btw, I just happen to have a shiny new pair of Sovtek 12AX7LPS.

Chris
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