[Amps] NCL-2000 mods

[jim feldman]

Steve, thanks for the correction.  I'm in serious "learn" mode.  After
reading up on voltage doublers, it seems the voltage output is pretty
sensitive to current loads.  I know grid current is very low with respect to
plate current, but  do you think I should be concerned that the regulated
grid voltage mod is getting it's power from the HV supply?

I found a RCA datasheet for the 8122, and it seems they recommend 20ohm
"non" inductive resistor between cathode and ground to lower 3rd order
distortion at the expense of a some output.

thanks
jim


On Wed, Jan 13, 2010 at 11:14 AM, Steve Katz <stevek at jmr.com> wrote:

> The HV power supply isn't half wave, it's a full-wave voltage doubler.
>
> 100uF caps should be fine, the originals in mine were 80uF and have
> never been replaced, still fine in 2010 (with different owner).
>
> WB2WIK/6
>
>