Hi Mitch, When I was chasing down an RS232 K3<>PC noise problem on 6M an homemade RS232 cable using CAT6 UTP to the K9YC spec cleared it completely. I then tried the USB<>RS232 converter for comparison and it was noisier, the converter that is.
Regards, Mike VP8NO ----- Original Message ----- From: "Mitch Mitchell" <[email protected]> To: <[email protected]> Sent: Monday, June 22, 2009 12:33 PM Subject: Re: [Elecraft] serial interface noise on 160m -- propagates throughK3 to coax cables and grounds... <snipo> | I have been able to narrow the source of the noise down to the USB to Serial converters or the USB Hubs themselves. The noise is getting into the ground through the serial interface on the K3 and then out to the coax shields. I'll have to move a heavy desk to determine which of the two potential offenders is actually generating the noise. | | I was curious if anyone else had experienced this with a K3 and USB<->Serial converters -- the pulsing of the noise turns out to be HRD polling the K3 for VFO position -- once every 300ms -- and when I turn off polling the noise stabilizes but is still present. I am doing research to see what I can do to eliminate it. <snipo> ______________________________________________________________ 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
