There are indeed two ways to eliminate fan cycling. K2AV suggests one approach, to run the fans all the time. Another approach is to run QRP all the time. Neither of those extremities appeals to me.
The K3 necessarily has a temperature spread (which seems to be small) between fan-on and fan-off temperatures. I am merely suggesting that this spread be increased. If "designer" options are a concern, the current unadjustable spread could simply be increased to a greater, but still unadjustable, spread. As I understand it, the K3's final transistors are quite robust with regard to temperature. The thermal Achilles heel of the K3 appears to be the amplifier's multipin connector, at least according to other posts. The fans don't seem to be able to cool that connector adequately. Less fan cycling will neither solve nor exacerbate that problem. 73, Paul W8TM *********************** K2AV sed: If cycling bothers you try setting CONFIG:KPA3 to FAN1 or FAN2. If you are operating SSB, that may remove most cycling. This adjustment sets the MINIMUM fan speed. "NOR" is fan off until called for. ______________________________________________________________ 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
