Dynaco PAS transformer breakdown

revintage · 8th November 2010, 08:07 AM

Anyone who knows which winding breaks, primary, 12V or HT? It is quite usual even if the 3 I recently found are OK.

Think SY mentinoned something about it long time ago.

If it is the primary my idea was to add a tiny 6+6V toroid.

kevinkr · 8th November 2010, 01:24 PM

I've found usually that the high voltage secondary shorts in these transformers, but I have only encountered a couple that were that way. I have also encountered one with an open primary. Obviously none of these issues can be worked around and the transformer has to be replaced. Replacements used to be readily available.

DualTriode · 8th November 2010, 02:06 PM

I do not know how the smoke came out of mine. I used this one as a replacement. It is made to fit.
PA211 Power Transformer Dyna PAS
DT
All just for fun!

revintage · 8th November 2010, 02:15 PM

Hey,
Was not into finding a replacement. I had hoped it always was the primary. In that case the idea was, as I mentioned, to add a small 6 or 12V toroid while still running the original for HT.

Kevin, to bad you found that the secondary normally breaks

.

8th November 2010, 08:07 AM	#1
revintage diyAudio Member Join Date: May 2007 Location: Eskilstuna, Sweden	Dynaco PAS transformer breakdown Anyone who knows which winding breaks, primary, 12V or HT? It is quite usual even if the 3 I recently found are OK. Think SY mentinoned something about it long time ago. If it is the primary my idea was to add a tiny 6+6V toroid. __________________ Brgds Lars

8th November 2010, 01:24 PM	#2
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	I've found usually that the high voltage secondary shorts in these transformers, but I have only encountered a couple that were that way. I have also encountered one with an open primary. Obviously none of these issues can be worked around and the transformer has to be replaced. Replacements used to be readily available. __________________ www.kta-hifi.net

8th November 2010, 02:15 PM	#4
revintage diyAudio Member Join Date: May 2007 Location: Eskilstuna, Sweden	Hey, Was not into finding a replacement. I had hoped it always was the primary. In that case the idea was, as I mentioned, to add a small 6 or 12V toroid while still running the original for HT. Kevin, to bad you found that the secondary normally breaks. __________________ Brgds Lars

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8th November 2010, 02:06 PM	#3
DualTriode diyAudio Member Join Date: Aug 2009 Location: Sacramento	I do not know how the smoke came out of mine. I used this one as a replacement. It is made to fit. PA211 Power Transformer Dyna PAS DT All just for fun!

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