Home Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

RE: Depends how beat up it is...

" The power transformers on the Citation II are not the best to begin with."

I don't agree at all, IMHO those transformers were top shelf stuff. What about them was substandard?

"Many of those amps ran so hot the potting material literally melted out."

Often the heating was due to the trafo being on an amp that needed work. And early on H-K got crazy with the bias spec of 100 ma. per tube. So the transformers were worked VERY hard in many cases. But even many of those trafos that were not well treated are still running just fine today, 50+ years later.

IMHO those trafos may have been assassinated by other amp issues but they very rarely failed on their own. We've seen some issues with the bias winding in the last few years, but that's it.


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