It probably doesn't make much difference, but I have the fan pushing air upward so it doesn't "fight" the air coming out of the slots at the forward end of the heat sink driven by the small fan when it is running.
The fan draws air in along the fins from the sides and expels it upward. I added a 100 ohm resistor in series with the power to cut the speed of mine to reduce the noise in a quiet room. Ron AC7AC -----Original Message----- This has been suggested many times by others.. now it is my turn to repeat it I guess: I mounted a 12 volt 4 inch muffin fan in a simple enclosure and placed it on top of my K2 blowing downward. I put a suitable resistor in series with the 12 volt supply so that the fan turned slowly and made no noise at all. The muffin fan ran all of the time and the little microfan in the K2 (almost) never came on while running cw or ssb. Don K7FJ 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 ______________________________________________________________ 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
