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In Reply to: RE: Coincident Frankenstein II schematic diagram... posted by jeffreybehr on March 20, 2014 at 23:01:14
I'd be interested in your opinion of having the 5U4 bypassed.
Follow Ups:
Does 'bypass' in this case mean replace? I understand it functions as a Voltage dropper and a slow-start device for the 300B's plate Voltage.
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Tin-eared audiofool, large-scale-Classical music lover, and damned-amateur fotografer.
William Bruce Cameron: "...not everything that can be counted counts, and not everything that counts can be counted."
The 5U4G isn't functioning as a slow-start device because it is directly heated. An indirectly heated tube like a 5AR4 starts conducting slowly and the voltage ramps up gradually. But a 5U4G conducts immediately and the full voltage appears without any gradual buildup.
Yeah, I agree here, and the 300B doesn't need a soft start - it will conduct immediately as well.
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