The bottom line on placement of rigs to avoid hum for Elecraft, or any other brand, is to place the transformers and switchers as far from the rigs as possible within reason. Use twisted pair leads from DC supplies external to the rigs, and shield them if possible.
Alternatively (and at great cost) one could buy MuMetal to line a power supply cabinet on the side toward the rig, but then you have a massive metal piece blocking venting and cooling of the power supply. As BPL trials have shown us, Power sources are sources of noise. Rigs need low noise to have best sensitivity on receivers to work the DX. DX means distance so keep those supplies at DX. 73 Stuart K5KVH _______________________________________________ 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
