Unit is now in transit to Elecraft for repair. Jim ab3cv
> On Nov 11, 2019, at 9:03 AM, Jim Miller <[email protected]> wrote: > I participated in the WAE RTTY contest this past weekend and was having problems with thermal tripping. I have resonant antennas for 80, 40 and 20m and had SWR between 1:1 and 1.2:1, power nominally set between 1400-1500w. I found that I couldn't repeatedly CQ without temperature creeping up so I paused to around 50% duty cycle to stop that. However when sending QTC which amount to about 200 characters the temperature would rapidly increase and eventually thermal trip. I took several actions to try to compensate: I opened the shack windows and bundled up. Shack then stayed at 60f or below. I immediately manually cranked the fan speed to max (5) when started to send QTCs. I rode the drive power downward as the power increased to stay below the trip point of 105c. Upon taking all these actions I was able to eventually send the QTC packets but it was unnerving and unexpected. This is a low serial number KPA1500 but with latest production firmware. What have others seen? 73 jim ab3cv ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
