Hopefully Elecraft can duplicate the apparent temperature related SWR problem and resolve it.
The loud fan noise contradicts preliminary reviews. Perhaps the early testers did not run the amp in a contest environment where it heated up. There are over 125 KPA1500's that have been manufactured so they should be getting used in all types of environments now. I hope to order one for my station, eventually. John KK9A from: Don Butler n5lz at comcast.net date: Sun May 6 18:41:31 EDT 2018 contest..... which is the first contest I have operated with the KPA1500 .... the heatsink temperature was down in the mid 40s C at the time .... and in my case it occurred on 160 meters only .... SWR as per other meters as well as the digital readout on the 1500 were reading 1.2:1 ... and did not change even when the LED flashing occurred ..... but I was getting intermittent flashing of all LEDs on the amp's SWR meter .... During the contest I was continuously running on CW with hourly QSO rates running between the 70s and 110s .... I opted to manually switch on the fan to keep the temperature below 60 degs C ..... level 2 seemed to keep it there most of the time .... but I did move up to level 3 a few times (and BTW, at that speed the KPA1500 is clearly the noisiest amp I have ever owned .... but, arguably, it may very well be the "coolest" also ..... headphones were absolutely necessary with that noisy fan ..... clearly much noisier than the Alpha 9500 sitting right next door ... which I also used during the same contest... So Mike, you're not the only one experiencing this phenomenon.... whatever it is.. Don, N5LZ (KPA1500 #45) ______________________________________________________________ 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]
