On 9/6/2012 4:48 PM, N2TK, Tony wrote: > For some reason the Line-In was > at maximum. I was getting hum on my transmit audio
The problem is that the transformers are unshielded (and un-needed, but that's another discussion), and unshielded transformers are sitting ducks for magnetic fields. The simplest solution is to roll off the low end using TXEQ, which is a good move anyway. Most of the what comes through a mic picking up speech below about 150 Hz is breath pop, handling noise, and room noise, and nothing below about 400 Hz contributes to speech intelligibility. So a smart operator will use TXEQ to kill everything below about 300-400 Hz. TXEQ makes that easy, and it kills the hum picked up by the transformer. 73, Jim 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
