--- In [email protected], "grant390" <[EMAIL PROTECTED]> wrote: > > Do you have transformers on both the audio going from rig->computer > AND computer->rig? > > Is there a ground connection between your radio and the computer? > There shouldn't be. > > Do you have a communication cable going between the rig and the > computer? You might try dialing in a 'noisy' frequency by hand and > then disconnecting the com cable to see if that makes a difference. > > What kind of rig interface are you using? > > KD7OFV > > --- In [email protected], "darylyng" <darylyng@> wrote: > > > > I have a 1:1 audio isolation transformer between my radio and the > > computer, which does a fine job until I get to around 11Mhz or the 20 > > meter band. In experiments, the radio interference dissapears when I > > disconnect the radio from the computer. Could I perhaps use a .01mF > > capacitor in series on both the center and shield of the output line to > > further isolate the radio and computer? Or is there a better way? > > >
Grant, I have just a Sangean ATS-803A receiver, no rig interface, just 2 6 foot long stereo audio cables with the aforementioned isolation transformer in between, no ground connection between computer and rig (I did have one but found out that made the noise worse). I do have a ground connection on my preselector going to the rig (tried disconnecting it but it made no difference in the noise). I have a Sony AN-1 active antenna.
