[amsat-bb] AO-7 Mode A

John Geiger af5cc2 at gmail.com
Sat Jun 10 19:29:14 UTC 2017

A good 10 meter antenna for the size and price is the MFJ 1890 2 element
Moxon Yagi.  It costs less than $100, and the longest element is about 12
feet long, and easy to turn with a TV rotor.  A couple of years ago I
worked 103 countries on 10 meters during the weekend of the CQWW contest,
and that was with the antenna at 16 feet high and blocked to the north by a
part of my house with steel siding on it. Probably not a worse place to put
an antenna, but it worked!

73 John AF5CC

On Sat, Jun 10, 2017 at 7:21 PM, rsoifer1--- via AMSAT-BB <
amsat-bb at amsat.org> wrote:

> Mode A has always been weaker than Mode B, but with a decent 10-meter
> antenna it is quite usable.  Many operators access Mode B with a 2-meter
> beam of some sort, then try to hear Mode A with a dipole or ground-mounted
> vertical , then complain that they cannot hear it.
> There is no substitute for a good 10-meter beam.  A tri-bander usually
> works too, but check the tuning to see that the SWR isn't too high at 29.5
> MHz.  If it is, you may have to re-tune it or even shorten the elements
> slightly.  If you absolutely cannot put up a beam, your second choice can
> be a 10-meter ground plane, elevated so it is mounted in the clear.  It has
> no forward gain of course, but it will give you a low radiation angle,
> which will help in hearing AO-7 when it is at low elevation which it is
> most of the time.
> With Field Day coming up, a little attention now to your 10-meter antenna
> will show up in your results later.
> 73 Ray W2RS
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