I agree with Vic here:
My KPA100 (and previously my K2) easily keys (without hot switching) my 20
year old Alpha 76PA which I'd converted to full QSK using a vacuum relay at
the QRO output and a power reed realy at the DRIVE input.
FIX THE AMP, NOT the RIG! There are a number of very capable non-QSK to
QSK conversions available at reasonable prices.
73,
Tom N0SS
At 12:21 AM 6/6/04, Vic Rosenthal wrote:
Guy Olinger, K2AV wrote:
Well, that's an interesting question. "Should" implies blame. Or who
owes who what. Or that someone has done something "wrong".
Maybe I should have said, "why compensate for a deficiency in the
amplifier by kludging the exciter?" Full QSK may not be so helpful when
you are running stations in a contest, but it is very helpful in a pileup.
Ameritron, for example has done something wrong (without quotes). Many of
their amplifiers use relays that take maybe 25 ms or more to go from rx to tx.
I have also seen vacuum-relays ruined by hot switching. It takes
longer, but the arcing destroys their points as well.
Even pin diode circuits can be ruined. I've managed to do that myself
before I figured out what was going on.
If you drive a vacuum relay or pin diode system with the K2's 8r line, you
will not hot switch, because there is plenty of time for the amp to switch
before the RF appears (and the hold time is also adequate, even when you
set the K2 to 0 delay).
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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