Alan, thanks for this tip. I wasn't the original writer of this issue but will try it. When I do reduce power it gets rid of birdies and intermodal on the downlink but makes it very marginal to make contacts near the horizon. This should help.
As a chance question, would simply hooking up the 2-meter port of a diplexer to a 2-meter RX side of my transceiver help eliminate 2-meter intermodal from public safety repeaters and cell-phone towers near my location? I'm thinking maybe the 2-meter side of a diplexer might have band pass or notch filter characteristics as well. I have severe birdies and intermodal from nearby RF sources on 2 meter weak signal work. Bob, NZ5A Sent from my iPhone On May 13, 2012, at 6:29 PM, "Alan P. Biddle" <apbid...@united.net> wrote: Paul, I use separate antennas, but have found that setting the AGC-T properly is essential. If set too high, it will amplify the noise, and it wipes out the downlink. By backing off, per the instructions in the manual, RX works very well. If I found the correct antenna on the Gulf Alpha site, the antenna uses separate feeds. For mode-J, it is very common to get noise. You can try this filter. Depending on the rest of the station, the results can be dramatic. http://www.amsat.org/amsat-new/articles/Mode-J/ 73s, Alan WA4SCA Is anyone using a 5000/VU5K with a dualband yagi for satellite work with any positive results? I recently put up a Gulf Alpha EZ Sat Dualband Satellite Yagi and it the performance has been very disappointing. The Flex RX downlink is completely 'overwhelmed' during TX on the uplink. The RX panadapter shows a flat line and a 10-20db rise during uplink TX effectively making my downlink signal unusable in trying to find my signal on the transponder. Before I ditch this antenna, I'd like to hear from anyone using a dualband antenna for satellite work, and any suggestions they might have. Paul Delaney - K6HR paul.hamra...@verizon.net http://k6hr.dyndns.org:8080 _______________________________________________ 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/ _______________________________________________ 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/
