Ron, Thanks for the comments!
I am one of those guys who really likes the "click-n-go" capability of JT65A. I have enough difficulty remembering to mouse click in the twelve (or fewer) seconds that I have before the next minute starts. If I had to also move the radio filter, I might have trouble getting it all done unless I really concentrated. Actually, I have done fine with the 25 watts or so that I am getting now. I was just curious as to why I could not get more power out before the ALC cut in. I have used the new tunable notch filter to wipe out some really strong signals, but it might be easier to move the passband filter, especially if the offending signals were near the edge of the 2 KHz JT65A slice of spectrum...I will try that. Ed, K0KC ________________________________ From: Ron Kolarik <rkola...@neb.rr.com> To: Ed Wilson <ed.wil...@ymail.com>; Flexradio@flex-radio.biz; flexra...@yahoogroups.com Sent: Thursday, October 20, 2011 1:46 PM Subject: Re: [Flexradio] VAC and JT65-HF Ed, If you setup a custom TX filter, mine is 1000Hz low and 1800Hz high, you will get more power out with the VAC TX slider set a lot lower than what you are running. The only problem with doing it that way is you can't have TX=RX offset turned on in JT65-HF, if a station is -400 from you then you just dial the RADIO down to match. Take your choice, a lot of the operating on JT65 is still locked in to the way PSK ops play.....wide filters, click and go and it's not always the best way. There's a bunch of radios out there stuck on 14070 :) Oh and Brian is right JT65 is a weak signal mode not a low power mode. If it was a low power mode the EME guys would all be running 5 watts. Use the power needed to hit an RB in your target area with a reasonable signal, the rest of us can always slide our passbands to eliminate a really loud signal....you gotta think outside the PSK box :) Ron K0IDT ----- Original Message ----- From: "Ed Wilson" <ed.wil...@ymail.com> To: "Dave Beumer WØDHB" <d...@w0dhb.net>; <Flexradio@flex-radio.biz>; <flexra...@yahoogroups.com> Sent: Thursday, October 20, 2011 11:38 AM 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/ _______________________________________________ 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/