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Re: A very good Move. What about "distributed capacitance"?

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In Reply to: A very good Move. posted by RBP on June 27, 2001 at 14:20:55:

I'll do the c4s first. Then I'll wait a little more. It seems like a cool thing to do. In Doc's description of "parafeed", though, he cites the small transformer and its less "distributed capacitance" as one of the benefits, allowing greater bandwidth. It sounds as though this wasn't an issue for you, benefits outwaying the drawbacks, but I'll remain prepared for anything, just in case. What I'm listening to now (stock, no c4s) is really something, I can always go back to that.
Jason
p.s.(did you lterally do the mods-c4s AND doubled output trans- at the same time? I hope I'm asking this for obvious reasons)
Thanks again.

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Once again, Thank You.<nt> jaybug 22:28:06 06/27/01 (0)
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Re: A very good Move. What about "distributed capacitance"? RBP 22:02:49 06/27/01 (0)
Sound wise...Not a problem..
The inputs are parallel and the output's are series. In this configuaration, capacitance should balance out.
No ill effects...I would have heard them.
Re: A very good Move. What about "distributed capacitance"? Paul Joppa 22:01:57 06/27/01 (0)
In the original, the yellow 1.25w tap is used. The distributed capacitance to the blue 0.625w tap is effectively doubled by the turns ration. In the modification, the blue 0.625w taps are used so there is no turns-ratio doubling, but two transformers are in parallel so their undoubled capacitance is doubled.
That wasn't very clear, was it? Oh well, the bottom line is the effective primary inductance, leakage inductance, and distributed capacitance are all unchanged from the stock setup.
With a little luck, I'll have a related surprise at the VALVE meeting Sunday.

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