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RE: Parafeed musings

Posted by deathtube 667 on June 10, 2015 at 16:33:04

In Reply to: Parafeed musings posted by twystd on May 13, 2015 at 16:23:05:

I have tried conventional choke loaded parafeed SE 2A3 and active CCS loaded parafeed with SE 45, triode 6V6 & 6CB5.

If you can dig up the old VoltSecond paper on extended C4S, try that with SE 45 finals using a high mu/jump factor driver stage.

The -3dB went out to 37KHz with inexpensive Altec 70V line OPT with the 45 finals.

I find that active parafeed knocks down the ripple a lot and allows for smaller uF values in the power supply filtering, but you will still have a quiet amp circuit.

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