No idea at this point. Two medium-power OPTs and a power tranny for $50 was too good to pass up. I recall stumbling across a few internet posts praising the iron quality. I also like the true balanced out - it appears the output taps are symetrical to a centre ground tap - and the 70 volt windings. The two suggest some interesting options for feedback topology which I haven't really investigated yet. The only possible negative heard so far, and I'm not 100% it related to these specific models, was that some manufacturers tended to run jukebox power tubes at very low current to extend service life. It does suggest caution regarding output biasing is warranted when working without a service manual.
Honestly I really haven't done more than check out the wiring so far. Too many other projects on the go.
Honestly I really haven't done more than check out the wiring so far. Too many other projects on the go.
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