On Jan 22, 2024, at 11:04 AM, Amp Guy Llc <kb1sel@...> wrote:

?Can you just obtain a new capacitor from Ameritron and modify the shaft to fit.

I use the plate side air variable capacitor out of the al80b, which is also used in a couple other models. I remove the plastic phenolic shaft and cut off the now exposed spline . I then use a shaft coupler to extend the 1/4 shaft extending out of the capacitor.?

New capacitor is under 40 bucks?

I used to rebuild the capacitors years ago, set plate gaps and hi pot. Not worth it when a new one is so cheap. Even after replacing plates , you still could end up having an intermittent connection issue between the plate shaft and end plates.

I would add a nice 50 ohm series glitch in series with the plate b+ . I like the Kanthal type resistors. And a spark gap for the Newley replaced capacitor .?

73 Scott Kb1sel?

Amp guy llc

Amprepairguy.com

YouTube Amp repair guy

203-892-4119

On Jan 22, 2024, at 10:36 AM, Rich k0zx <k0zx.co@...> wrote:

?Now that's a very adventuresome solution there, well done....unfortunately space is available only for this cap, so probably not the best for this 500. Tnx for the idea tho
rich?