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In Reply to: RE: different take posted by bouncy ball on May 22, 2015 at 22:33:07
I disagree, the output transformer could almost be INexpensive.With a proper design before the outputs, which importantly - less than 5% of the SE existing amps do, the less expensive output transformered amps will creme, totally creme, the fancy and costly output transformered amps !!
Now, if you are talking about the "other 95% " of amps, with just a typical mediocre average build, a more expensive output is a very INDIRECT way to get "slightly" better sound. But WHO can stomach listening to such mediocrity in design and execution of the circuitry that preceeds the transformer, well....not I !!!
In the end, we all listen to a modulated power supply.
How good is its design and performance ??
Jeff Medwin
Edits: 07/12/15Follow Ups:
Good point.
How about a B+ supply operating at 300 kilohertz, rectified and filtered using only ferrite chokes. Electrolytic caps do not function at these speeds so cannot be used. Film and foil, small values used for wave shaping thus allowing the ferrites to swallow the noise.
The final cap can be an MKP1840 series, 800 volt, not more than 50UF. Ten microfarad works well.
What this does to a 45 or 2A3 is to goose the performance to unheard of levels especially the speed and the dynamics. The increase in performance is down to the fact that at 50 hertz, the final cap is delivering power for nominally 18 milliseconds when the diodes are not conducting. Thus you are listing to what the cap does using its internal chemistry. In the case of high speed supplies, this timing is a microsecond or two.
Coloration? the ferrites are all operating in the megahertz range and ignore the audio that sneaks through.
Regards john
mrubey,
Give Jack Elliano ( Electra-print )a call about your transformer needs. You have options of copper, partial silver, solid silver secondary if you wish and for less money than others. He can also answer any questions and give suggestions on circuits etc. I have several SET mono block amps and I am very happy with them. His transformers are top notch !!!
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