Hi All, I tried using these two items together and am getting scratchy audio in the headphones when I speak on USB even though the monitor is set to zero. When I use the rear headphones out to feed the HA400 it is really bad and loud. When I use the front headphone jack its medium loud but still not right. It can be heard on my transmitted audio.
I tried using a battery to power the HA400 to isolate the ground but it has no effect. I did the "Modification Improving the Immunity of the Rear-Panel RS232 and Audio Connectors to RF" mod, and checked to be sure that the "Front Panel Microphone Circuit" mod had been done at the factory. I tried also using RG 174 for the audio feed. No change. I also removed the serial cable and had no change. Any suggestions would be greatly appreciated as I do need to have four headsets on the K3 for various ham demos. 72 and thanks, Steve, W2MY ______________________________________________________________ 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
