Question on Vacuum State SuperReg

[Grannyring]

I am building a dual mono 6sn7 SS rectified tube preamp. This is my first build on my own going way beyond mods I have done in the past. I am using the SuperReg to regulate the voltage on the B+.

I have both the room and parts to place a nice CLCLC Pi filter before the SuperReg and wonder if this is a better thing? I know I don't need to overdo this filter before the SuperReg, but I have the parts and space and think it can only help. Right? Love to hear your thoughts here....

Thanks all!

 

[AndrewT]

What did the Designer have to say?

 

[planet10]

Given how well the SuperReg works an LC filter on the PS is likely sufficient.

dave

 

[Zen Mod]

Late Allen Wright always advised choke filter in front of any regulator , including his own Super Reg

I agree with P10 , it's almost redundant here , but why not

 

[Grannyring]

Thanks all. I will move on a do a nice CLC filter before the SuperReg. Being newer to this I have one other question on this filter. What value choke do,I use?

The choke is feeding a 6sn7 plate with 325 volts. I plan for 375 volts into the SugerReg and 325 vac to the 6sn7 plate. There is a 90k resistor on the plate. The cathode is 4k ohms. Input is 147k.

How do I figure the choke value I need?

Thanks all

 

[Grannyring]

Forget these values as they are all wrong and I will use the tube lab tool to figure this out! These are not the resistor values I will choose etc.... Still learning.