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In the Forum: Audio Discussions
In the Thread: How to get a LOT of SET power.
Post Subject: OKPosted by N-set on: 8/25/2011
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 Paul S wrote:
N-Set, at some point I wil try to actually pay attention.  In the meantime, does effective RC change with signal/gain in this situation?  If so, it might also appear to "change the slope".


Paul, the FR does not seem to depend on the level, but I've sorted that out.
I played with the resistors a bit, lowering them to 15.5k,
which according to some formulas I've found (P. Millet) should give -3dB @approx. 70Hz...but
it gives -3dB@50Hz as wanted. Also the slope seems ok: 24db/oct. Me idiot.
What happens around around 370Hz I no idea. This is what the filter spitts out.
The green plot is the grid of the driver, the magenta is at the load:

GU81mv4.1_FR.GIF

So I guess the basic electron flow is +/- ok now. The next step would be breadboarding,
but I have no possibility to do it in the near future.
Any takers? I'd assist whith what I know.
Some HV ideas have been already put forward earlier in the thread, the main trick being
buying Nichicon 550V electrolytics cheaply directly in China (stacking 3x1500uF
for 500u/1650V) together with 1.2kV SiC's Smile

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