hi all, > For most uses > the RF noise is unimportant and it's one of the most difficult things for > many who use these supplies to assess without actually trying the unit in > the shack.
I agree, but I found out that a coarse measure for the quality of the supply is just its weight. Plastic cases are lightweight and bad shielding. _No_ torroids are lightweight and do not shield RF. So look for metal cases, many toroids and the chance will be better that you will not have EMI problems with your switching power supply. The last one I kicked into the wastebin was delivered with my network camera. (and it had nearly no weight) I had to replace it with a linear PS to enjoy 80m on my K2. 73! de Werner OE9FWV -- Q: How many surrealists does it take to screw in a lightbulb? A: Two. One to hold the giraffe and the other to fill the bathtub with brightly colored machine tools. PGP-Key: <http://www.qsl.net/oe9fwv/furlan.asc> Fone +43 5522 75013 Fax +43 820 555 85 2621 Mobile +43 664 6340014 K2 #5203 _______________________________________________ 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