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In Reply to: RE: A critical inductance choke input filter.... posted by Tre' on July 16, 2023 at 06:59:45
Thank you for your response, it was helpful. You said that your filament supply's current doesn't change; what filter configuration do you use? Pi filter or choke? If you use a pi filter with less regulation, don't you also get more noise? So would it not be helpful for noise to use a very quiet regulator?
Follow Ups:
My filament supplies for the direct heated tubes are LCRCL and my heater supplies for the indirect heated tubes are LCRC with critical inductance input chokes and a lot of capacitance. In both cases the ripple is almost non-existent.Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Edits: 07/25/23
Thank you. That is very helpful. IN both of your situations, does the resistor do anything to remove some of the noise, or is it only to reduce some of the voltage?
Both. The resistor value is chosen to dial in the voltage I need and a resistor before a cap will allow the cap to better filter the ripple.Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Edits: 07/25/23
got it, thanks.
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