Hello David, I have not had that exact problem, so others might be able to shed more light than I can. First thing I would do is check for an open ground or a ground loop. Also consider that your ptt "ground" is not necessarily your audio "ground". Does the problem go away when you transmit into a dummy load and/or at reduced power? Does it improve when you drop the audio level into and from your interface? Are you in close proximity to your antenna with your radio, computer and interface? Does this happen on just one band or on all bands? Not familiar with that interface, but is the interface audio hot and the mic hot tied together or are you using an aux port? Also what does the your signal sound like, other than "terrible"? Sorry for so many questions.
If all else checks out, the ferrite chokes are a fairly inexpensive fix, if indeed it is your cable that is picking up the RF. 73, Bill N9DSJ --- In digitalradio@yahoogroups.com, "David Bowman WB0QIR" <[EMAIL PROTECTED]> wrote: > > I have a Kenwood TS-680S rig and am using a psk31/rtty soundcard > interface from Associated Radio. Whenever The db9 data cable from the > interface is plugged into a computer my signal is terrible when I > transmit data or use the microphone. Unhooking the microphone does > not help. Before I buy some ferrite chokes I wanted to see if anyone > has any other ideas of how or what the problem may be and how to fix it. >
