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In Reply to: RE: SE 6C33C amplifier news posted by chrismercurio on January 17, 2014 at 10:52:26:
The B+ doesn't go through the 3 minute delay though right? only a 5V component of the B+? At least that's how I read it. Wait...I get it. That 1 sec mosfet delay into the DPDT relay doesn't kick over until the 5v component hits it 3 minutes after startup. That gets rid of turn on thump that would happen otherwise and provides a full 3 minutes on the 6c33c filaments to stabilize after power on before the B+ hits. If all of the above is true, why not sum the 6.3V and the 250V at the input and put the whole summed winding through a soft start and delay like the ones you sell? Maybe it's an issue with the high current requirement of the power tube B+.
This would be a bit of a pita to wire point to point and inside a compact stereo chassis. A common supply for both channels would help some though.
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Follow Ups
- RE: SE 6C33C amplifier news - chrismercurio 11:36:09 01/17/14 (1)
- RE: SE 6C33C amplifier news - KevinC 07:20:21 01/18/14 (0)