In Reply to: Depends how beat up it is... posted by Freo-1 on April 19, 2015 at 13:23:28:
" 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.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- RE: Depends how beat up it is... - Jim McShane 14:34:20 04/19/15 (5)
- Not a big fan of the voltage doubler, nor the HEAT they generate - Freo-1 14:42:06 04/19/15 (4)
- Wow..The Mac Mc240 and the Mc75s and the Mc225 are all doublers - Michael Samra 04:40:16 04/22/15 (1)
- Good Information - Freo-1 16:53:34 04/24/15 (0)
- RE: Not a big fan of the voltage doubler, nor the HEAT they generate - unclestu 15:08:46 04/19/15 (1)
- RE: Not a big fan of the voltage doubler, nor the HEAT they generate - Triode_Kingdom 15:44:28 04/19/15 (0)