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In the Forum: Audio Discussions
In the Thread: How to get a LOT of SET power.
Post Subject: StabilityPosted by Paul S on: 5/23/2011
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N-set, have another look at the Chimera "bias", and the sophistocated way the diodes effectively buffer the gain stages, also the way the caps are staged over the tiered ground planes.  Also check where the Ls are with respect to the signal.  Perhaps a design like this only "works" with "perfect" parts; but here the diodes seem to effectively provide some breathing room and also a "calming effect" for the tank circuit, like a drop of oil on water.  Of course, I have not heard this amp, and reports I have gotten about it were not ecstatic.

You obviously know about filters; certainly it is not for me to tell you.  The same laws apply whether the curve is written with theoretical LC or RC; but in my experience the choke may become more problematic, at least in a situation like this, for reasons Romy cited, and also EM, ESR, and phase (drift...) issues that may be worth considering, as well.

Best regards,
Paul S

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