I've had good luck with a home-built 18 turn helix antenna on a rotor, sending about 10 watts up 60' of hardline and about 12' of RG-213. Backing off the power I still got a good quieting signal with maybe 5 watts (hard to tell - no meter in the shack), before it started getting a little scratchy. Not sure what that computes to in terms of EIRP.

See http://home.wavecable.com/~ko6th, at the bottom of the page.

Greg KO6TH

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Date: Tue, 12 Feb 2008 10:58:58 -0800 From: jeff@mock.com To: amsat-bb@amsat.org Subject: [amsat-bb] AO-51 L-band antenna

What is a good choice for an L-band uplink antenna for AO-51? Is it possible to use an omni antenna or do you need to be able to point at the satellite?

thanks, jeff AD6EO

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