Dynaco Pas Transformer

jesserparker · 3rd September 2008, 03:33 AM

Hello all,
I recently acquired (for $20, no less!) a Dynaco PAS-2 preamp. It's in pretty good shape mechanically and cosmetically. All the 12AX7s test just fine.
However, someone apparently cannabalized the PSU a bit. And the 12X4 tube and the power transformer are missing. The 12X4 socket is still there, so that will be a simple matter. However, while schematics online for this design are abundant enough. I seem to be unable to find the value of the transformer.
Now I am considering upgrading the power supply in entirety later on. But I would like to get this up and running in (minus the selenium rectifier) stock condition to have a baseline to compare to. I wonder it any of you out there know what value transformer I should be looking for.
Thanks in advance, I appreciate it greatly,
-jesse

Eli Duttman · 3rd September 2008, 03:53 AM

Jesse,

$32.95 buys a perfect replacement for the power trafo from Triode Electronics. Look here.

jesserparker · 3rd September 2008, 04:28 AM

Wow, perfect! Thanks a bunch.

3rd September 2008, 03:33 AM	#1
jesserparker diyAudio Member Join Date: Mar 2003 Location: Ohio	Dynaco Pas Transformer Hello all, I recently acquired (for $20, no less!) a Dynaco PAS-2 preamp. It's in pretty good shape mechanically and cosmetically. All the 12AX7s test just fine. However, someone apparently cannabalized the PSU a bit. And the 12X4 tube and the power transformer are missing. The 12X4 socket is still there, so that will be a simple matter. However, while schematics online for this design are abundant enough. I seem to be unable to find the value of the transformer. Now I am considering upgrading the power supply in entirety later on. But I would like to get this up and running in (minus the selenium rectifier) stock condition to have a baseline to compare to. I wonder it any of you out there know what value transformer I should be looking for. Thanks in advance, I appreciate it greatly, -jesse

3rd September 2008, 03:53 AM	#2
Eli Duttman diyAudio Member Join Date: Apr 2004 Location: Plainsboro, NJ	Jesse, $32.95 buys a perfect replacement for the power trafo from Triode Electronics. Look here. __________________ Eli D.

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3rd September 2008, 04:28 AM	#3
jesserparker diyAudio Member Join Date: Mar 2003 Location: Ohio	Wow, perfect! Thanks a bunch.

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