[nanchangbob]

I've been reading posts here for some time but this is my first I've started.  I'm building a 6x4 power supply which I attached for Franks 6sn7 preamp.  I intend to use a dual mono design for the power supply.  Anyway as you can see it uses 3 150uf electrolytic capacitors and I was thinking of using some Solen 30uf or 40uf instead?  I was wondering if this was a good idea or if I should use some good electrolytic caps like the Panasonic TS series with polypropylene bypass caps.  Something like Sonic-caps. I did try to use the search but I had trouble finding what I was looking for.  Thanks for your help.
 

[chrisby]

I've used Solen Fast caps with great success in several small tube amp projects, although none of the power supplies were as elaborate as shown.

Provided they meet the voltage requirements, I can't see why not  - except of course for the physical dimension and cost factors - a full dual mono CLC PS filter stage with film caps can easily consume more cubic space and $$$ than a non-exotic OPT, and you generally want to hide the former .

With the choke filtered and regulated supply shown, a single low value ( e.g.  40uF or so) film cap at each B+ tap might be quite satisfactory.

[nanchangbob]

"I can't see why not  - except of course for the physical dimension and cost factors"   

Actually I am putting this in a two box design because I want the ability to change the preamp.  I already have a matisse preamp and I am building Franks 6sn7.  I work and live in China and the circuit boards for the power supply and main board were available.  So the space will be no issue.  As far as cost goes I don't mind spending some extra money on the parts if the improvements are obvious.  I read some people saying that 30uf or 40uf were enough on other designs.  I just wondered if it would be for this one? If not how large of capacitors should I use and is it worth it?  Thanks