Built the voltage doubler

Built the voltage doubler

This was actually fun. Here are the results.

Input was 127-127VAC secondary. Output across a load of 5.9K was 644VDC,
and across a load of 3.5K it was 623VDC. Not bad, huh? This tranny will
actually support some sort of low-medium power amp.

Re: Built the voltage doubler

Phil S. wrote:
> This was actually fun. Here are the results.
>
> Input was 127-127VAC secondary. Output across a load of 5.9K was 644VDC,
> and across a load of 3.5K it was 623VDC. Not bad, huh? This tranny will
> actually support some sort of low-medium power amp.
>
>
voltage doublers reduces the current capacity ..
or increase ripples ..
or something along those lines ....

YMMV

Re: Built the voltage doubler

On May 8, 2:59 pm, WB <warb...@ppp,com > wrote:
> Phil S. wrote:
> > This was actually fun. Here are the results.
>
> > Input was 127-127VAC secondary. Output across a load of 5.9K was 644VDC,
> > and across a load of 3.5K it was 623VDC. Not bad, huh? This tranny will
> > actually support some sort of low-medium power amp.
>
> voltage doublers reduces the current capacity ..
> or increase ripples ..
> or something along those lines ....
>
> YMMV

Law of conservation of energy....voltage double, amps half.

Look at the numbers. With the doubler, I can build a SE EL34 (not
enough mA for much more, but it gives me 600v), or just use a FW
bridge (no 2x-er) and I'll get B+ north of 300. This turned out to be
a nice hunk of iron, for little money.

Oddly enough, or maybe not, that chart Phil Alison posted many years
ago says mA based on the ohms on the primary should be around
225-300. It turns out that's about right.

AFA ripple, that's what chokes and caps are for.