Dave, I can get 100 watts out in the tune mode (and CW when I use that mode).
Ed, K0KC ________________________________ From: Dave Beumer WØDHB <d...@w0dhb.net> To: 'Ed Wilson' <ed.wil...@ymail.com>; Flexradio@flex-radio.biz; flexra...@yahoogroups.com Sent: Thursday, October 20, 2011 2:48 PM Subject: RE: [Flexradio] VAC and JT65-HF Ed When I get a chance later today I’ll see the max power I can get out of JT65 alc -3 drive slider 100 into a dummy load. Have you tested your max power out hitting “TUN” and running Drive to 100 ? Maybe your overall output power is low. Dave From:Ed Wilson [mailto:ed.wil...@ymail.com] Sent: Thursday, October 20, 2011 10:39 AM To: Dave Beumer WØDHB; Flexradio@flex-radio.biz; flexra...@yahoogroups.com Subject: Re: [Flexradio] VAC and JT65-HF Dave, Thanks for the hints. First of all, the dummy load does not make any difference compared to the antenna since the VSWR is essentially 1:1 with the antenna. I did try PSK31 using DM780 and I was able to obtain about 50 watts output with the ALC reading -3 dB...I believe that I moved the slider up to -3 to obtain this reading. My transmit filter is 0 to 3K, so I do not think that should be a problem. Ed, K0KC ________________________________ From:Dave Beumer WØDHB <d...@w0dhb.net> To: 'Ed Wilson' <ed.wil...@ymail.com>; Flexradio@flex-radio.biz; flexra...@yahoogroups.com Sent: Thursday, October 20, 2011 12:23 PM Subject: RE: [Flexradio] VAC and JT65-HF Ed Have you tried to get higher power with other digital modes ? I can get 60+ watts out on PSK with Drive at 100, ALC level of -3 with level slider -1 . Are you certain your xmit filter is not attenuating the output.. have you tested with a dummy load ? Dave -----Original Message----- From: flexradio-boun...@flex-radio.biz [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Ed Wilson Sent: Thursday, October 20, 2011 8:50 AM To: Flexradio@flex-radio.biz; flexra...@yahoogroups.com Subject: [Flexradio] VAC and JT65-HF Colleagues, I have been running JT65A using the JT65-HF software for the past month or so with good results (several hundred contacts with at least half DX). I have a Flex-5000 and I am running PowerSDR 2.2.3 under Windows 7/32. I have set my Drive control to 100 and have adjusted the VAC TX gain for an ALC reading of -3 dB (-6 on the slider control). With these settings I get from 25 to 30 watts out, depending upon the band. This power output is adequate for JT-65A, but what if I wanted to run more power? The only way that I can get my power output into the 100 watt range is to do so by increasing the VAC TX gain to a value of at least 0 and then the ALC is up to +3 dB, which probably would create splatter all over the slice of spectrum set aside for JT65A. Also, any other suggestions for DSP or other settings that would optimize J65A operation with PowerSDR would be appreciated. Thanks, Ed, K0KC _______________________________________________ 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/
