Andy obrien wrote: > I will jump in on this topic.. with the TS-440. Using the TS440, one can > use the RCA Phono jacks on the back of the TS440 labelled AFSK In and AFSK > out. Then use vox to key the rig via software like DM780 , Fldigi. or > Multipsk. Using this method with plain audio cables results in NO isolation > between rig and computer and increases the chances of ground loops causing > distorted or noisy transmitted tones. If you keep the transmitted power to > around 25 watts or less , you can usually get a clean signal. You can use > home made circuits to isolate the rig-PC or buy some commercial products > usually made for car stereo systems that eliminate ground loops.
I deliberately sat on my hands when I read the 'I don't use an interface' posts, so I'm glad Andy made the points he made. If only people would realise that it's not always problems to their own reception that is the problem, then the rest of us might enjoy cleaner bands... Please don't accept IMD reports from people who measure the IMD on a modulated signal, please also don't accept IMD reports from someone who you don't know isn't over driving their own audio input to their soundcard. They could be telling you things are bad when they are not, and vice versa. You wouldn't be happy living next to someone who over drives their radio by screaming into the microphone, so why do the same to others on digital modes just because you think you are immune to all over drive problems? There are not enough sales of IMD meter and PSK meter in the world... Dave (G0DJA) ------------------------------------ Suggested frequencies for calling CQ with experimental digital modes = 3584,10147, 14074 USB on your dial plus 1000Hz on waterfall. Announce your digital presence via our Interactive Sked Pages at http://www.obriensweb.com/sked Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/digitalradio/join (Yahoo! ID required) <*> To change settings via email: [email protected] [email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
