[amsat-bb] Re: AO-7 Mode A

Paul Stoetzer n8hm at arrl.net
Tue Nov 5 19:07:16 PST 2013

Use what you have to begin with!

I made one QSO via Mode A with AC0RA back in September using a just a 
one meter diameter AlexLoop Walkham Portable Magnetic Loop on the 
downlink. One thing to remember is that the receiver on Mode A  is not 
as sensitive as Mode B, so you need higher EIRP than on Mode B, probably 
around 100 watts or so, for a decent downlink signal.

Audio of the middle of the pass is here: 

Keep in mind that I'm a mile southwest of the Capitol in Washington, DC. 
There are lots of buildings and lots of noise sources nearby. In the 
middle of a lesser populated area, I bet I'd receive a pretty good 
signal with this antenna. The QSO occurs about the 4 minute mark of the 
video, with the satellite at about 60 degrees of elevation. I don't 
think I was pointing my Arrow high enough while fiddling with 
everything, but even then, with about 20-25 watts EIRP on 2 meters, the 
downlink signal is going to be a bit weak.


Paul Stoetzer, N8HM
Washington, DC

On 11/5/2013 7:10 PM, Kevin Deane wrote:
> Does anyone have any success in mode A? If so what type of 10m antenna?
> Kevin
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