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In Reply to: RE: not a fan of SS, but posted by DAK on August 19, 2016 at 12:25:59
the center tap is normally going to go to ground. so with a SPDT switch(?) you could toggle between just sending the CT straight to ground, or to ground via the resistor. That's my guess.
Follow Ups:
I'd have the resistor in circuit and short across it for normal operation. Then you never have an open circuit.
So, when switch is off the voltage is dropped by the large resistor keeping the B+ down while the tubes are warming up. Then you flip the switch and the full B+ is allowed.
Have you monitored this technique to see what the voltage does. If there is any overshoot while the load stabilizes? Also when the switch is connected how much of a noise is made?
Edits: 08/19/16
Never tried it myself, just speculating one way to do it better than having an open circuit. I'd like put cap across switch terminals to minimize spark when opening / closing.
"I'd like put cap across switch terminals to minimize spark when opening / closing."
Placing a small cap directly across contacts can actually weld them together. A series RC is required to quench contact arcing.
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