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In Reply to: RE: CARY 40M Special ... with Cap Input posted by Steve O on January 25, 2015 at 17:57:32
Steve,Read body of my post a bit more carefully please . 1.46 VAC is stock ripple with 600 uF. I also have a "pointer" at 1.46 VAC on the top sim, if you look carefully.
" We get a sinusoidal B+ waveform. B+ ripple to the Finals, with 1/10th the capacitance, declining from 1.46 VAC (top) to only 0.89 VAC (bottom)."
The physicist has triode connected the KT-88s, and he wanted me to get him 50 VDC less B+ for the finals. The basic modification will also work quite nicely with a 0.75 Ohm 10 mHY Electraprint 4 A. filament choke in the L1 position. But I got to choose what I wanted, and personally liked the best, with a set of compromises I am willing to live with. Its called "dealer's choice ".
The Marantz Model Nine amp, a mis-designed P.O.S., needs the same mod as a start !!
Edits: 01/25/15Follow Ups:
...or a "Y" axis scale with finer graduations if it's not too much trouble.
Steve,
I was under the impression that 1.4684 VAC IS the peak to peak voltage, as it is the top and bottom of the waveform differences, just like .888 VAC was on my modded SIMULATION.
On the top most sim, you easily can see 1.4684 under the "diff" ( differences ) column, where I have a pointer aiming at that figure.
Am I missing something in responding to your question / comment sir ??
Jeff Medwin
...and the upper plot has no Y scale to speak of so I can't. Ultimately not important.
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