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How about if I add another 330uf/400vdc cap to the string? That will get me up to 1600vdc right? Capacitance is now down to 83uf, but it is still enough, and the caps should handle the start up surge, yes?
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Totally new concept to me, so I am not familar with how it is supposed to work. Any articles about them on line?
Thanks
Vince
but it a nutshell, it limits turn-on current surge. as time goes by, it gets hot thus reducing the resistance which in turn allows more current to pass through.after a few seconds of like maybe 10(depending on specs of the ntc thermistor you used), you'll circuit should be receiving the full current.
Vince,A pair of 6AU4s in the rectification setup does WONDERS for turn on surges. Damper diodes turn on VERY slowly. So, the signal tubes are hot and ready to conduct when the B+ rises.
When slow starting dampers are used, the caps. in a choke I/P filter don't have to deal with the peak voltage of the AC waveform.
Another good thing about damper diodes is their LOW forward drop. 5AR4s are good in the forward drop dept., but damper diodes are BETTER.
Eli D.
Eli
I have been trying to keep things as simple as possible, but that may not work. Is there any way to model the damper diodes in psud2? Do you have a schematic that shows how to hook them into the circuit?
Thanks
Vince
PSUD offers a few dampers, 6AU4 among them. I don't think it has a hybrid bridge, but voltage will be halfway between a solid state bridge and 4 damper bridge.
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