Jeff Maass wrote:
> We have a TenTec Titan III at PJ2T which is currently unusable because of
> serious arcing
> on 20 meters. It is so bad that the amp will only run 300 watts.
>
> The problem is clearly in the loading capacitor, an air variable. There is an
> area on one
> of the rotor plates that is burned and broiled so badly that it has fattened
> up the rotor
> and it is nearly coming into contact with the stator at the spot where 20
> tunes up best.
>
> Can this be fixed by sanding it down (and perhaps coating the plates with
> something) or is
> this always going to be a "weak spot" on the capacitor that will start to arc
> again?
If the capacitor is the type that you can take apart the individual
plates, you can file it smooth, and then polish it on a buffing wheel.
I've done that successfully with SB-220-type tuning caps.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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