Steve, With my K3 , i use USB for PSK31 and i've set the button "PWR" to 100W, the "LINE" (rear line input) to 50 and i adjust the output level of my sound card with "Tune" mode of Digipan (a ~ single tone) to get ~ 50W average output; during PSK31 transmission, i've an average output power between 15 and 25 W depending upon transmitted text. Sometimes, i do a little adjustment by lowering the audio drive to NEVER get an average output power over 25W (measured with LP-100A with a SWR <= 1.4:1 and 1.1:1 on the K3 (ATU ON) ) I do test with a 2nd instance of Digipan running with a 2nd TX/RX (FT857) and a 2nd sound card; i get an IMD between -24 and -28dB; it should be a little better "ON AIR", because i've a little "proximity" effect with my "Winter" antenna at only 3 meters from my FT857....at the balcony. Anyway, these values are not too bad and are a little bit better than the average of received stations (between -16 and -24dB).
73 QRO de Rudolf, HB9ARI PS May be it's not the best setup, but it work for me and i announce a 25W to my correspondents. [email protected] wrote: > No I did not turn off compression. I will give this a try. Has anyone else > tried using PSK31 with USB mode? > > >> Did you turn compression off? >> >> Bob NW8L >> > > On Mon, Feb 16, 2009 at 12:12 PM, <[email protected]> > wrote: > >> After all this discussion of power control in DATA A mode vs SSB, I >> > decided > >> to try using PSK31 with USB mode, rather than DATA A. I changed the MIC >> > SEL > >> menu item to Line IN and adjusted the ALC meter to 4-5 bars using the MIC >> GAIN control. The PSK31 power output appeared to closely match the K3 >> > power > >> setting. Unfortunately, I received horrendous feedback about the widthand >> IMD of my signal -- when I returned to DATA A mode, my signal width and >> > IMD > >> returned back to acceptable values. >> >> Steve N9SZ >> > > ______________________________________________________________ > 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 > > ______________________________________________________________ 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
