On 2/3/2012 9:25 PM, Guy Olinger K2AV wrote: > There is that mu-metal stuff. But mostly > that level of induction from something pulling that much current into > microphone level devices is a really really hard cure, hence > "uncurable" in quotes.
From the symptoms, it was coming into the LINE INPUT -- he said the Line Input was cranked up and he turned it down or off and cured the problem. Yes, mu-metal shielding cures the problem, but that's a lot more expensive than what's in the radio. The real issue is that transformers are the wrong solution. All that is needed is simple chassis-to-chassis bonding between the equipment being interconnected. This sort of design error is what happens when you assign digital guys to design audio circuits. :) 73, Jim Brown K9YC ______________________________________________________________ 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
