The MFJ-4125 "PowerLite" power supply is a great little unit for the price (around $100). It puts out 13.7V at 25A in a small, light package that is perfect for portable operation with the K3 or K2. Unlike some other switching supplies, it has very low electrical noise.
Unfortunately the same can't be said for acoustic noise. The loud fan is the one thing people complain about. So I designed a fan controller that reduces the fan voltage for normal operation while running it at full speed when the internal heat sink warms up. I've posted an article on my web page: http://www.cds1.net/~n1al/ham/fan_controller.htm I have enough parts left over to build 4 more units. If anyone is interested I can supply a kit of parts for $5 postpaid/USA that includes the clamp and all electrical parts except for the TIP-29 power transistor. (I'll throw in a TIP-31 from my junk box that that should work the same, or you can obtain the exact part yourself.) I also have a couple PC boards left over that I'll include while they last. Email me if you're interested: n...@cds1.net . Al N1AL ______________________________________________________________ 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
