Chris et al: I know there is a lot bad said about switching power supply noise, but I've been using little 12V 4A switchers for a couple of years now and have never found noise a problem. Actually, I work in the electronics industry and have collected a number of these from several suppliers and have had no problems with any of them that I can recall. Typically these power supplies are a little bigger than a bar of soap and have an IEC power connector on one end and an output cable on the other. They are all switchers, and as mentioned are rated at 12V 4A output. They work great on the K2 and my SG-2020 running up to 12W or so output, possibly more. Regulation is pretty good ... typically better than 1/2 volt from receive to key-down. The latest batch I got are from Delta Electronics in China and are fully shielded with input and output RFI filtering including a ferrite core on the output cable just before the coaxial connector. These are all "FCC Class B" devices. Several even ha d exactly the right connector to plug right into the K2. Look around on surplus sites ... you can probably find plenty of these. The coaxial connector you want is 5.5mm outside, 2mm inside. If you buy one and find it noisy, you can bash me on this reflector .... but I've had no problems. If your shack is very near your antenna you may have more problems. My antennas are high (around 60') and my radios are in the basement, so there is good isolation between the power supply and the antennas.
The All Electronics CAT# PS-1231 looks like it would work but you will have to change the connector. My point is, don't discount the little switchers. They're cheap, universal input (100 - 264 VAC, work anywhere in the world), small and light. If nothing else, good to have for travel. regards, Jim -------------- Original message ---------------------- From: Chris Kantarjiev <[EMAIL PROTECTED]> > > Be sure to double-check both the no-load and loaded voltage output... > > it may be much greater a difference than you wish to work with. > > Ah, good catch Tom - it drops to under 13V under Tx load. I'll look > for something else. I'd like to find a little laptop supply, > but they tend to be higher current these days - trying to pare > down my weight for the Spartan Sprint :-) > > 73 de chris K6DBG > _______________________________________________ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > 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: Elecraft@mailman.qth.net 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
