[amsat-bb] Re: Field Day AO-51 configuration - another option

Jeff KB2M kb2m at comcast.net
Wed May 5 07:54:07 PDT 2010

 The trouble with V/S is that any clueless group trying to make a sat
contact will be blindly transmitting on the 2m uplinks. Since nothing is
being heard on the UHF downlink, they think the bird is open, so call CQ
even more. Their thinking mode V/U, it totally blows away the S band D/L.
This happened 3 or 4 years ago. The whole pass was people calling CQ FD
without listening to the mode s D/L. A disaster. I don't think I heard even
1 contact being made on several east coast passes I tried. We have to
remember there are a lot of groups trying to make a sat contact for the
points, that don't read this SIG, so they just try calling on the V/U
frequencies. I'm for L/U. It would be cool to try L/S, but I think I was
told it isn't possible because it wouldn't leave a channel for control?  

73 Jeff kb2m

-----Original Message-----
From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] On
Behalf Of Alan P. Biddle
Sent: Wednesday, May 05, 2010 8:50 AM
Subject: [amsat-bb] Re: Field Day AO-51 configuration - another option

One thing I would like to see tried, perhaps for one FD as a test, would be
to relax the restrictions on FM mode contacts where one or both of the
frequencies is above 70 cm.  That would certainly encourage people to try
L/U or V/S.  Based on last year's numbers, every L/U station could have
worked every other station easily, given the shortness of a FD QSO.
Considering that people manage to work these modes portable, and in the case
of N5AFV, mobile, it is relatively easy to get on.  The mode-S downlink is
truly loud, easily overcoming the general 2.45 GHz QRM/QRN.


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