captcurt2000 wrote: > Thanks Milt: > > I have both PTT and vox set-up so I can use it either way. The > interface uses an opto in the PTT link so I think it is good that way. > > I've been using PTT manually for sstv and vox for psk31. I've > disconnected one line at atime trying to figure out which part of the > card is getting it but it remains with most of the stuff unplugged. > > I do have a firly hi SWR issue at the moment and I'm sure that isn't > helping the situation but hope to have that resolved shortly. > > I'll try adding the chokes and bypasses. Might also try bypassing the > inputs right on the card since they all have 2-3' of cable hanging on > them. > > I'm hoping to get most of these issues sorted out prior to starting up > the softrocks. > > Churt > KU8L > Livonia, MI > > > > Hi Curt,
Yes, a high SWR can create serious problems with RF getting into the computer equipment. Fixing the SWR problem may solve your PSK signal problem. However, I would also add the chokes and bypasses. In addition, if you have some clamp-on ferrite cores that you can put on the audio lines, I would do that as well. I have also used approx. 1 inch diameter ferrite toroids with the audio lines wrapped through the core with two or three turns. Milt, W8NUE (formerly of Dearborn)
