FWIW: I run my KPA500 at 500W in any mode [well ... not PSK31 :-)] and
it handles it just fine. I seem to remember, during the KPA500 field
testing, that Jim, K9YC, was told to run his at 700W in a RTTY contest
and it did it just fine there too. Difference between 400 and 500 is
less than 1dB, and to each his own of course, but I think the amp is
more robust than some may think.
73,
Fred K6DGW
- Northern California Contest Club
- CU in the 2013 Cal QSO Party 5-6 Oct 2013
- www.cqp.org
On 9/30/2013 8:35 AM, KD3TB wrote:
I ran the KPA500 in the CQWW RTTY contest this weekend. With a drive power
of 15 to 20W from the K3, I kept the KPA500 output between 350 and 400W
output. Even during runs (calling CQ), the temperature never went above 65
degrees on the KAT500 meter. The cooling fan changed speeds as needed and
kept the amp with its tolerances. This was enough power to break pile ups
and get into Asia with no trouble.
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