comment on this B+ supply

[jarthel]

here's the schematic:

http://img221.imageshack.us/my.php?i...titled3lt4.png

please ignore the transformer and CLC input.

Instead, I will be using:

230VCT transformer => tube rectifier => 10H choke => 100uF cap.

Everything else is the same.

target Vout = 150VDC


thank you.

[ray_moth]

I just read the answers you received in response to the same question on AA, where you mentioned that you were thinking of using this PS design for the Aikido high impedance headphone amp. The general feeling on AA was that it should work OK and I agree. However, I wonder if you need such an elaborate regulated PS for that purpose, unless you have a problem of wildly varying mains voltage?

[Sherman]

Originally posted by ray_moth
... you were thinking of using this PS design for the Aikido high impedance headphone amp. ...

However, I wonder if you need such an elaborate regulated PS for that purpose, unless you have a problem of wildly varying mains voltage?

Agreed. I thought one of the benefits of the Aikido circuit was excellent cancellation of PS noise. It seems overkill to regulate the B+ like this and I wonder about any sonic benefit.

However, if you want to do it just to do it then by all means go for it.

[Wavebourn]

230CT, or 460CT?
With 230CT and without a cap after rectifier before choke you can't get 150V.
Also, you use one FET already for the CCS. Why did you stuck with a tube in the shunt regulator? Use just the same FET with one 145V zener across drain and gate.

[ErikdeBest]

True, one of the virtues of the Aikido is it's rejection of PS noise. But the last project by Broskie isn't a SE class A Aikido anymore, but a good old PP WCF. And Morgan Jones state it as follows (in building amplifiers):
"because optimised WCF's develop their correction voltage across the series combination of the intentional regulating resistor at the anode of the upper valve and the output impedance of the supply, a regulator is almost mandatory..."

Erik

[jarthel]

Originally posted by ray_moth
I just read the answers you received in response to the same question on AA, where you mentioned that you were thinking of using this PS design for the Aikido high impedance headphone amp. The general feeling on AA was that it should work OK and I agree. However, I wonder if you need such an elaborate regulated PS for that purpose, unless you have a problem of wildly varying mains voltage?

Originally posted by Sherman



Agreed. I thought one of the benefits of the Aikido circuit was excellent cancellation of PS noise. It seems overkill to regulate the B+ like this and I wonder about any sonic benefit.

However, if you want to do it just to do it then by all means go for it.

the purpose of using regulated supplies is to get a very good psu but I also want to try other things

plus the fact that a simple ccs which doesn't use batteries and the tl431 regulator from raleigh audio isn't very complicated to make and parts are readily available (I got most of it already except for some resistors in the dn2540 circuit) and cheap.