Hum,It definatly looks like a stereo PP setup.
The trannies almost look like they are the same ones in a Dynaco ST-70.
Looks like it was an Organ-amp,or part of a console?
7591 output tubes? (hard to tell in the pic)
The trannies almost look like they are the same ones in a Dynaco ST-70.
Looks like it was an Organ-amp,or part of a console?
7591 output tubes? (hard to tell in the pic)
It's an AMI/Rowe jukebox amp. Have one very similar under the bench, sourced from E-bay for the iron.
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.
Well I haven't got that far.
Looked at it and thought ahh bit of interesting soldering so was thinking of checking it over and may be getting a rebuild kit of valves and resitors. Then giving it a go.
Looked at it and thought ahh bit of interesting soldering so was thinking of checking it over and may be getting a rebuild kit of valves and resitors. Then giving it a go.
Well it's a bit useless as I don't have the pre amp.
Oh well. Anyone gaot a preamp for one of these?
Oh well. Anyone gaot a preamp for one of these?
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