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In Reply to: RE: Too funny posted by Triode_Kingdom on October 14, 2014 at 05:40:02
I have found that a big part of the SE sound is the output transformer. A very good air gapped SE output transformer has as much to do with the SE sound as does the tube type used; they overload gently and musically. You can balance the currents in a push pull transformer with a dummy load, but that circuit will have a penalty as the current source is in the signal path and it will be a challenge to keep the currents balanced as the tube(s) ages leading to saturation distortion at all output levels.
Because you can do something does not always make it the best solution.
Follow Ups:
Gee, I suppose it's a good thing that my amp was optimized for push-pull. Maybe if I say that a third time, you'll drop your obsession with the fact that the amp offers admittedly non-optimal SE configurations as a bonus. I don't know what to tell you, you're suggesting that I basically go back to the drawing board and reconfigure my amp to be something that was not intended. This amp is purpose built for push-pull (for the fourth time) and offers SE as an aside. I never even came close to claiming that this was anywhere near the best possible SE amplifier. Frankly, I'm not even a big fan of SE, which is why those modes take a back seat, and why Cit II iron was chosen.
I am glad you are enjoying the amp. I must have tuned out half way through your opening 7 posts, sorry for the confusion.
People swear by his SE amps. And the SE 45 amp I heard in his basement was outstanding. He used OPTs from vintage Push Pull Webster Organ amps. I neve could get a straight answer as to why they sounded good . I never would have used those OPTs but they were actually fine. I am still puzzled how he used those OPTs for a wider variety of amps.
Edits: 10/14/14
Most likely, these transformers had enough of a natural gap to support the low current from the 45.
way back in the beginning of the us se craze sp did a article on a budget 45 amp. And I think it mentioned using a big pair pp trans as 40 ma wasn't enough to saturate them badly. There was something about webster outputs. I have read many times that they are extremely musical outputs. paper insulation and 50 years of core and wire break in might be the secret. I just bought a sansui amp for the outputs. I payed more then it would of cost me to have silk wind me a new pair. I think the sansui outputs are worth the money. And don't worry I wont break it up if it is restorable.I was looking at buying a vintage dagger a few years ago and I also read that you have to look out for flat areas in the blade as some after 50 years the metal actually breaks down. Which also makes me wonder what affects that time has on vintage transformer cores. Good or bad.
Edits: 10/19/14
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