Hi Michael, In my experience with the 1500, I've found that I get a much better looking signal by keeping the drive low... like you are currently doing, around 40 or so. At that level, my IMD meter gives me very positive readings.
If you want less power than you get from that drive level, I would use TX gain. For what it's worth, I *have* noticed that if I set the PSDR drive between 75 and 100 for my 1500, and then put the output through my amp the resulting signal is definitely not as nice... definitely poor readings from my IMD meter. Hope that helps, Peter K1PGV -----Original Message----- From: flexradio-boun...@flex-radio.biz [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Michael Tondee Sent: Saturday, November 05, 2011 1:58 PM To: flexradio@flex-radio.biz Subject: [Flexradio] Setting power output on PSK-31 with Power SDR and Fldigi? Please forgive me if this seems a redundant question but I'm trying to change over my digital programs from the Minideluxe/HRD/ DM780 combo to Logger 32 using fldigi with the the N2AMG fldigi gateway. I'm using a Flex 1500 with a 5 watt in/50 watt out homebrew amplifier and PowerSDR 2.2.3. and trying to limit my power to about 20 or so watts out . I usually get about 50 watts out in the "tune" mode by setting the drive in PowerSDR around 40. Should I set the drive to obtain full output from the amp and then use TX gain to adjust the power? Or should I use a combination of TX gain and drive to regulate power out. I know there are articles out there on using PSK with PowerSDR or using fldigi with it by my situation is a little different because of the configuration described above and I want to avoid a 'dirty" signal. Tnx and 73, Michael, W4HIJ _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
