Beginners regulated PSU.

[Paul Barker]

I am trying to decide if the 100uf after the series R is a good or bad idea.

I my experience it sounds worse with the capacitor because of the sound of capacitors, rather than because of any smoothing benefits.

The last capacitorless supply had a Black gate in that position but when I removed it and relied entirely on the shunt valves (572b's) the sound improved to a more than noticeable extent. A larger improvement that when we were trying to decide if a grid choke sounded better than a resistor.

Phil I hadn't realised what you were doing was only for a preamp. Then the VR tube on cathode is better for you. I have this in my present amp and use the 6080 as the shunt valve.

[pre65]

ONLY FOR A PREAMP ?

[Nick]

I am trying to decide if the 100uf after the series R is a good or bad idea.

I my experience it sounds worse with the capacitor because of the sound of capacitors, rather than because of any smoothing benefits.

Yep, I would not have put one there, its asking the shunt reg to do most of its AC work against the ESR of the cap instead of the series resistor.

[Paul Barker]

ONLY FOR A PREAMP ?

Not needing lashings of current shunted.

[Mike H]

Depends what the total supply current for the pre-amp circuit needs to be, but you might find examples of simple low current shunt regs that just use a resistor and 1+ VR tubes

More complicated than that is, er, more complicated....

[pre65]

What I liked about the "Cresswell" tutorial shunt regulator was

A) I understood the tutorial, and I worked out the values.

B) I have all the bits to make it.

C) Still thinking about C.

[Mike H]

Yes that also makes sense to me.


D. there is no D (© Andrew I. )