Hi Arunas, There could be something in this old PC idea. Mine is a 700MHz P3 vintage 2000. Slower internal clocking maybe. However the first thing I am doing is making up a new CAT5 based serial cable. Might even try the USB-RS232 converter I have to see if anything changes.
Regards, Mike VP8NO ----- Original Message ----- From: "LY2IJ" <[email protected]> To: <[email protected]> Sent: Friday, April 24, 2009 5:54 AM Subject: [Elecraft] RS232 Noise | Hi, | | I had the same problem on 160m - floating spur was up to S5..7 with | antenna disconnected. I tried with 5 different brands serial cables, | ferrite chokes, used different laptop power supplies, but that didn't | help at all. Only solution was to change computer to newer one. | I made K3 "Improving the Immunity of the Rear-Panel RS232 and Audio | Connectors to RFmodifications" latter on, but didn't check old computer | after. | | No idea about other bands. | | 73 | Arunas / LY2IJ /k3 #500 ______________________________________________________________ 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
