voltage doubler

voltage doubler

If I build this doubler * w w w .tpub . com /neets/book7/27m.htm figure 4-49
at the bottom of the page, for that unknown PT, any suggestions for C and R
values? Is this just like any other power supply circuit? Maybe a pair of
20mf caps and a couple of 5K-10K for R1 and R2? What about RL?

I'm thinking that the HT secondary just might be 120-0-120 @ 250mA. I'm
hoping to get cap input B+ somewhere in the middle 200's. If I can get that
with 110-120mA, I can build something Fenderish with 3x 12AX7 and 2x 6AQ5.
If it turns out lower mA than that, maybe I can build a single ended amp? I
don't have a SE EL84.

Maybe this ends up on eBay? I'm addicted. Please help me.

Re: voltage doubler


"Phil S." <psymonds_no_spam@comcast . net > wrote in message
news:ooKdna5JCohhJIbVnZ2dnUVZ_vSdnZ2d@comcast . com ...
> If I build this doubler * w w w .tpub . com /neets/book7/27m.htm figure
> 4-49 at the bottom of the page, for that unknown PT, any suggestions for C
> and R values? Is this just like any other power supply circuit? Maybe a
> pair of 20mf caps and a couple of 5K-10K for R1 and R2? What about RL?
>
> I'm thinking that the HT secondary just might be 120-0-120 @ 250mA. I'm
> hoping to get cap input B+ somewhere in the middle 200's. If I can get
> that with 110-120mA, I can build something Fenderish with 3x 12AX7 and 2x
> 6AQ5. If it turns out lower mA than that, maybe I can build a single ended
> amp? I don't have a SE EL84.
>
> Maybe this ends up on eBay? I'm addicted. Please help me.
>

OK, I got help somewhere else. 220K resistors, 100uf caps, 4K load.