Irwin, I ran mine at 500W for 20 hrs. 1268 QSO fan speed fixe at 4 and no problem. 60% of the time in RUN/CQ mode.
73, Claude VE2FK From: KD3TB Sent: Monday, September 30, 2013 11:35 AM To: 'Elecraft Reflector' Subject: [Elecraft] KPA500 in the RTTY Contest For General Information - 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. The interface between the KAT500 and KPA500 was seem less allowing me to quickly move between bands. Although not listed as a RTTY contesting amp, I was really impressed with the KPA500 performance. Irwin - KD3TB ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html