> Well, things are "improving" and staying the same. > > Setup: Athlon AMD 64x2 w/ 2 gig memory, XP os system; Delta 44 soundcard; > parallel port; 1.6.2 software; mode = CW; keying direct to SDR box. > > Well, got the parallel card to work by using DF00 in the LPT address (did > not know you could type in that box), now I rcve okay. > BUT the tx problems are the same as with the USB to parallel connection > that I had been using. In other words getting the PCI parallel card > working did not solve my problem. > > Here is what is going on ... > > Rcv okay. > > On "Tune" it puts out approx 50w to dummy load. > On Tx of a series of dits it puts out 50 - 90+ w to dummy load. > If drive is set to 0 is arnd 50w output to dummy load. > If drive is set to 100, arnd 90+ w output to dummy load.
If this is in CW mode, what's the problem? You should be able to make some QSOs that way. On CW, at least. The PA amplifier settings, in my experience, seem to be a bit of a compromise. If you're expecting that "50" on the Drive scale will equal "50" watts, you'll be disappointed. It doesn't seem to be linear, exactly, to the watt. There is a certain amount of "each PA card is different" in operation here as well as some nonlinearity. Or, so I always assumed. On my own rig, I've even tried different calibration wattages, but IME, I don't recall it ever lining up one for one across the entire range. You usually get something "close" and "close" varies by the calibration wattage chosen, but I have never done better than that, at least. And, I can live with it. The actual reported output seems to be pretty accurate (especially at these early tests, I assume you have some sort of external wattmeter to double check?). So, it's all about the mysteries of calibration. I have a pragmatic knowledge of this only. The 0 watt setting giving 50 watts out is a bit extreme, however. Is this true on all bands? You need to be able to get it down to 20 to 30 for RTTY (Flex doesn't recommend much over 20-25 for RTTY). But, if 100 says 90, that's relatively normal, on my rig anyway. Larry WO0Z _______________________________________________ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
