Also sure you don't have anything blocking the fins at the *front* of the K2. The air blown in the back by the little fan comes out between the fins where they reach the plate at the front of the KPA100. I've found that a lot of people don't realize the gaps are there to let the air escape.
For what it's worth, I helped do the thermal testing of John's PLL temperature compensation mod (that's now built into current K2's). To do that I "hammered" my K2/100 with a great many high-duty-cycle transmit periods into a large dummy load while monitoring the internal temperature. Many times the internal air temperature got up to 50C or 60C and the KPA100 heat sink was too hot to leave my hand on it very long. Absolutely no deleterious effects were noted then or later. (Still have the same finals too <G>). That rig is designed with a large margin of safety. Ron AC7AC -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Don Wilhelm Sent: Saturday, October 29, 2005 12:19 PM To: R. Kevin Stover; Elecraft mailing list Subject: RE: [Elecraft] Cooling fans Kevin, The easiest solution is to simply lay the fan (horizontally) across the heat sink fins. Suck the hot air away from the heat sink, that way it works in tandem with the internal fan rather than fighting the internal fan airstream. 73, Don W3FPR > -----Original Message----- > > I'm getting my K2/100 ready for sweeps and have decided to add some > aux cooling. I have a couple of 3" computer case fans and was > wondering from those who've done the same about placement and whether > blow the air onto the heatsink or suck it through. > > Thanks for your input. > > R. Kevin Stover > AC0H > K2/100 # 4684. > > _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
