>
>I intend to do a PIN switch for my next amplifier. I managed to get some
>Unitrode diodes rated at 1.2kv and 1 amp - 10 wire ended and 10 stud mount
>with tape leads, all with a long trr so they are good for 160. However, I
>don't actually like operating QSK!
** QSK-CW is even rarer these days than traditional CW. For me. the
reason to use high-speed switching is SSB-VOX. Those who talk
continously for 10-minutes are something to be avoided at all cost.
>Of course, switching the high voltage to
>reverse bias the PINs while providing 1 amp of DC for forward conduction is
>an interesting project in itself.
** Quite -- but optoisolators and 1500v transistors help.
> Although the probability of an infinite
>VSWR is probably low from the viewpoint of mis-tuning the tuner, an arc can
>cause a pretty near infinite VSWR, so you could get twice the normal
>transmission line voltage appearing.
>
** especially if the arc is from a lightning strike.
>...
Rich, AG6K, 805-386-3734, www.vcnet.com/measures
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