My station is an FT-847, into 11 elements on both 2M and 70cm. The two yagis are on the same polarization plane, perpendicular to the cross-boom. Coax runs are about 50 feet. The cross-boom is about 4 feet separation but will be closer to 10 feet on my home station. I had no external pre-amps in place during FD but will have at least a 70cm mast-mounted pre-amp at home.
When uplinking on Mode B, I hear some static on the downlink at approximately S-4 to S-6. This effect is less pronounced on SSB than on CW but is still noticeable.
I did not notice this when uplinking on 2 meters with 70cm down, but it's probably because I didn't have to swish the dits to find my downlink when working the Mode J FM birds.
73 de W0HV, Jim in Raymore, MO
Light travels faster than sound... This is why some people appear bright until you hear them speak.
Date: Mon, 30 Jun 2008 14:45:08 -0400 (EDT) From: Clint Bradford [email protected] Subject: [amsat-bb] De-sense To: [email protected], [email protected] Message-ID: <[email protected]link.ne t> Content-Type: text/plain; charset=UTF-8
...significant de-sensing of my 2 meter downlink from my 70cm
Just so we're all on the same page, could you please be a little more specific with your symptoms? And briefly describe your station?
Clint Bradford, K6LCS
-------------------------------------- Clint Bradford, K6LCS / KAF3359