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RE: is a vacuum

Posted by tube wrangler (M) on April 6, 2010 at 14:21:15

In Reply to: RE: is a vacuum posted by RC Daniel on April 6, 2010 at 01:14:52:

Good post. The CCS is a regulaTOR-- an active device that produces its own distortions, signatures, and time delays.

For Push/Pull, the argument is: (1) should one build excellent, fast responding power supplies so that tube's performance will be exemplar without the CCS, or (2) should one destroy the power supply's sonic characteristics by installing overkill on choke and cap values, have very low hum and ripple, and then try to restore the dynamic performance of the stage in question by applying a CCS device to it to regulate current.

Of course, you now have to listen to the regulator regulating. That is not the sound of music.

For the SET enthusiast, the CCS is out, period. I know, many people use them to regulate current, but unfortunately, (and fortunately if you understand it), in a SET-- if you don't lose transparency somewhere in it, the CCS device is going to be rather---- shall we say---- obvious sonically?

SETS require lots of low-DCR power be available for every stage. Adding any active device other than the stage itself-- that is operating, simply smears the music.

The best way to regulate current in a SET stage is to have a power supply that supplies that current without a significant voltage drop.

---Dennis---

Edits: 04/06/10

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