by paart » Fri Mar 18, 2016 8:13 pm
It seems that Triode Electronics has been “out-of-stock” on the PA774 power transformer for some time. I needed two, one for an original repair, and one for a friend. Since one was for an original chassis, that eliminated the possibility of using a physically larger Edcor, so I decided to contact DynaKit. Triode advertises that their transformers are wound with larger wire than the original, and run cooler. I’ve confirmed this with comparative primary and secondary resistance measurements and output voltage checks.
I asked Kevin at DynaKit about this, and he took some resistance measurements. “close enough” I said, and ordered two. When I received two very good looking PA774’s, I checked them both and found that they both matched (very slightly better-actually)) the winding resistances of the Triode offerings, and the secondary (HV) output voltage is a little closer to the original Dynaco’s.
I’m Happy!
Unlike Triode, Dynakit advises the stock status of each item on its particular web-order page!