This will depend on the input relay or other switching circuit used in the Commander. Some
QSK circuits use a small reed relay in the input and a vacuum relay for the output. In
that case it's possible that 500-600w from the KPA500 will be too much for it. Others use
a pair of vacuum relays, which would not be a problem. It may also use a single large
open-frame relay, which would also be OK (although not QSK). Or it might have a PIN diode
switch, in which case it would depend on the details of the circuit.
I think the best thing for you to do is to call Command Technologies and ask them about
your particular model and serial number.
On 12/18/2012 9:44 AM, Bruce McLaughlin wrote:
I finally succumbed to temptation and ordered a KPA 500 which will arrive
tomorrow. This may be a question that can't be answered on this reflector
but I thought I would try. I have an HF 2500 Commander, the Palstar
version, which I have been using with the k3 and other radios. I am not
sure about how I will integrate the KPA 500 into the station. I have been
switching between three different radios and the Commander amplifier using a
coax switch to switch the output of the various radios to the input of the
Commander. I have been thinking about pulling the output of the k3, running
it through the KPA 500 and then running the output of the KPA 500 to the
coax switch. With that arrangement the switching would be exactly the same
as before.
However, I am a little concerned about running 500 Watts into the input Of
the Commander even when that amplifier is turned off. I am wondering
whether that might damage the input circuits Of the Commander. Does anyone
have any suggestions. I should mention That the Commander works just fine
with all of the radios but I wanted to complete the K line and experience
integrated, completely automatic operation. The lower power from the KPA
500 should not make any significant difference for most contacts. I would
appreciate any thoughts on the subject.
Bruce-W8FU
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Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/
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