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In Reply to: RE: Power Transformer Rating posted by Tubenstein on May 21, 2016 at 15:16:33
"300vct @100mA => 6D22S (2 for full wave) => 16H 11.2 ohm LC Choke => 200uf => 200vdc"That will only get you about 130vdc.
If you place a 20uf cap to ground between the rectifier tubes and the choke (giving you a CLC filter) you will get about 190vdc after the choke.
The actual voltage value will depend on the DCR of the power transformer and the amount of current your circuit draws.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Edits: 05/21/16Follow Ups:
How about this one?
600vct @100mA => 6CJ3 (2 for full wave) => 16H 11.2 ohm LC Choke => 200uf => K&K Audio HV regulator => 200vdc
Is that ok?
Can you determine the DCR of the power transformer (600vct @100mA) for me?
Thanks!
That would give about 260vdc after the choke.
I have no way of knowing the DCR of your transformer.
Do you have a ohm meter?
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
I want to build another power supply to compare how it sounds. Like this:
600vct @100mA => 6D22S => 16H 11.2 ohm LC Choke => 5000uf => 5W RESISTOR => 5000uf => 2W RESISTOR => 5000uf => 180vdc
Would you please show me which value of both 5W and 2W resistors to achieve the value at the end for 185vdc??
Thanks!
So the DC voltage still 260v after the LC choke, right?
Yes. It should be something close to that.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
No one can do that without knowing the DCR of the power transformer and the amount of current the circuit is going to draw.
It's easier to just build it and change the values of the resistors until you get the voltage you want.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Do you think 6D22s can handle 200uF. Typically data regarding max capv vs impedance for damper tubes is scarce so I'd think erring on the safe side would be prudent. 200uF seems high.
I'm sorry. That was a typo.
I meant to type 20uf.
Interestingly PSUD2 doesn't throw a warning with 6D22s and a 200uf input cap.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
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