Fans are always good... I saw someone selling a thermostatically controlled fan for 70 bucks recently... Built for whatever you want to use it on. I wish I knew where he got his thermostat from... I would build it myself... Can't bring myself to spend 70 bucks on a fan. -- Thanks and 73's, For equipment, and software setups and reviews see: www.nk7z.net for MixW support see; http://groups.yahoo.com/neo/groups/mixw/info for Dopplergram information see: http://groups.yahoo.com/neo/groups/dopplergram/info for MM-SSTV see: http://groups.yahoo.com/neo/groups/MM-SSTV/info
On Sun, 2014-07-20 at 16:54 -0700, george fritkin via Elecraft wrote: > Why not run it at 50 watts and give up the 3db. Probably will not make a > difference in number of contacts and your thermal problem should go away. > Also what is SWR > > George, W6GF > > > On Sunday, July 20, 2014 4:23 PM, Bert via Elecraft > <[email protected]> wrote: > > > > I used my KX3/KXPA100 in the NAQP RTTY contest this weekend. The KX3 with > added-on heat sink worked very well; however, the KXPA100 repeatedly faulted > with HI TEMPERATURE indicated on the KX3 at full output after prolonged > operating (lots of CQ'ing with short pause intervals). PA.X temp indicated at > failure was around 60C...as it should. Shack temperature was around 70 > degrees F > Yes, I know all about digital modes and full power stressing amplifiers, > etc. What I want to know is how to mitigate this interruption yet run full > output. To that end, I have a couple ideas: what if I mounted the amp > vertically so the heatsink fins "drew" cooler air through themselves via > convection? Secondly, would a couple muffin fans mounted atop the cooling > fins do > the job? > The net of this is that I'd like to enjoy the full benefit of having a > high-quality 100-Watt amplifier, regardless of mode or key-down time. > > Bert N4CW/K1IMI > ______________________________________________________________ > 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] > ______________________________________________________________ > 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] ______________________________________________________________ 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]
