Make sure you put the fans the right way around, ie. sucking up the hot air and blowing it away from the heat sink :-)
73, Matt VK2RQ > On 22 Jul 2014, at 9:18 am, Bert via Elecraft <[email protected]> > wrote: > > Thanks to all who made suggestions. I will be trying one or two fans atop > the heat sink and see how that works out in the next RTTY contest foray. > While looking into possibilities, I checked out the web site where I got my > "add-on" KX3 heat sink (https://proaudioeng.com/products/) and found they > had added a new product, a power supply specifically for the KX3. Specs > look promising. [I don't have a vested interest in the company, just pleased > with the heat sink.] > Again, this reflector is a great source for ideas about great products! > 73, Bert N4CW/K1IMI > > > In a message dated 7/20/2014 7:18:48 P.M. Eastern Daylight Time, > [email protected] writes: > > 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]
