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How can I change the dc voltage from 150v to 180v?
The circuit is bias at 180v 20ma and this supply should be adequate, right?
Follow Ups:
It is not a 150v supply. It is a 300v regulated supply with a voltage divider tap on the output to derive a 150v reference voltage for the heater supply.
Change the voltage divider that is made up of the 470k and the 270k resistors that feed the grid of the control tube.Wait, that supply makes no sense to me.
Why would anyone want to build a series regulated power supply and then place series resistors (the 6k and the 200k) after the regulator which results in the voltage becoming unregulated again?
If you wanted to change the 300vdc regulated voltage a little either way then you could do what I said above but I don't think you can get it down to 180 regulated.
Edit, I see now that the 150vdc is just the reference voltage to "float" the heaters up.
That's a 300vdc series regulated supply and the 150vdc is not intended to operate the audio circuit. The 300vdc (fully regulated) is intended to operate the audio circuits.
If you need a 180vdc regulated supply to operate audio circuits I don't think this is the supply for you.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Edits: 05/08/16
Tre
I agree but the 300v is regulated and then if he didn't need the 300v source,he could knock off the 150v source string.Maybe the intent was to only regulate the 300v and not the 150.
A friend you get for nothing,an enemy has to be bought
"Maybe the intent was to only regulate the 300v and not the 150."
Yes, the 300v is regulated and the 150v is only to float the heaters.
No need to regulate the heater float voltage.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Makes sense now..I have 150vdc float on my Allen wright Fvh5 preamp on the phono stage and like 50vdc on the linestage.
A friend you get for nothing,an enemy has to be bought
Couldn't agree more. It's another flawed design pulled off the Web with nothing to qualify it for this use.
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Buy Chinese. Bury freedom.
I still question using tubes for regulation in DC supply unless it's in a big RF amp.
A friend you get for nothing,an enemy has to be bought
nada aqui
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Buy Chinese. Bury freedom.
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