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Re: Eliminating Desensing



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 <clintbrad4d@earthlink.net>
Subject: [amsat-bb]  De-sense
To: amsat-bb@amsat.org, amsat-bb@amsat.org
Message-ID:
	
<18909860.1214851508223.JavaMail.root@elwamui-milano.atl.sa.earthlink.ne
t>
	
Content-Type: text/plain; charset=UTF-8

>>...significant de-sensing of my 2 meter downlink from my 70cm
uplink...

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

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