It's interesting that you're getting arcs on your 922s. Ever since I put in
the mods, I can't
remember a single arc -- ever!! And I use mine as a "tuner" on a low-band
dipole for the upper
bands. I run it full bore 10-75m, including 17m without any problems. I
replaced the bandswitch
(it was torched when I got it), went with RF Parts 3-500ZGs, and installed some
of Richard's mods
-- I haven't gotten to the step-start, QSK & Bias mod, but plan to. It's been
over a year since
I've done all this, and it's been smooth as silk at 1200 to 1400W, depending on
the band.
One of the things I did was slightly bend the one of the tuning cap's plates in
so if I ever get
an arc, it will hopefully be there instead of the bandswitch. So far, so good!!
Joe,
N3JI
--- Rob & Terri Sherwood <rob@sherweng.com> wrote:
> I have two TL-922As with all the Measures mods and Kessler QSK and bias
> mods . They are stable now, work fine on semi-breakin, and put out 1200
> watts. The down side is the output loading cap is under rated, so I
> tune up on low voltage, switch to high voltage and leave the tuning
> alone. Otherwise I can arc over the load cap. My older Alphas were
> work horses, but had no protection circuitry. Bought my Alpha 99 used
> for $2500, and could not be happier. Significantly easier to tune up
> than my 89. All these amps were significantly cleaner than my IC-4KL
> that has found a new home. If you can find a used 99, buy it and keep
> it forever.
> 73, Rob, NC0B
>
>
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