Hi Julian, I choose USB to be able to use VOX; may be i'm wrong, but with DATA A, the TX activation is only possible with COM or PTT? (it's the case for my "old" FT857) As i use rarely voice modulation, the front panel I/O receptacles are free, i don't have the necessity of a TX activation with lot of problems like RTS? and/or DSR?, DTR?, etc. The serial K3 is always connected to PC, and sometimes activated at the same time with WSJT and JT65-HF, for other programs like HRD,etc I prefer to use a LINE Input for the K3 to get a better SNR; i get sometimes bad results when using a MIC input level for modulation from sound card... I agree with you to avoid any level of compression and this level is always set to "0" , during my (rare) voice QSO too.
I worked before for Broadcast TV and, before digital audio/video transfer, LINE level was always preferred, when possible, to MIC level for audio. One more point for LINE level, is value is +/- well defined, for MIC level, it's an other story... 73 QRO de Rudolf, HB9ARI Julian, G4ILO wrote: > I don't understand why anyone would use USB mode to operate a sound card data > mode, and have all the bother of switching the input between the mic socket > and the back panel, when the K3 provides a data mode with EQ flat and > compression off specifically for that purpose. > > Surely using a digimode set up for SSB with ALC operating and 20dB of > compression is going to cause distortion and splatter? Admittedly, JT65A > isn't PSK31 but even so I would have thought IMD products would occur, > though if you are operating on some VHF band and not the crowded digital > sector of 20m perhaps no-one will be bothered? > > I find my K3 produces more than ample output to drive sound card apps. I am > currently using LIN OUT = 10. In fact if I use much higher levels clipping > occurs somwhere and I see harmonics on the waterfall spectrum. > > On transmit the wave and master output sliders of my SB Live 24 card are set > to just below half way and the LINE level is currently set to 7. So I cannot > explain why you find the K3 line input insensitive or a lack of drive on > receive. > > ----- > Julian, G4ILO. K2 #392 K3 #222. > * G4ILO's Shack - http://www.g4ilo.com > * KComm - http://www.g4ilo.com/kcomm.html > * KTune - http://www.g4ilo.com/ktune.html > > ______________________________________________________________ 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
