[amsat-bb] Re: Rotor freezing and S mode
ko6th_greg at hotmail.com
Wed Jan 30 21:47:33 PST 2008
I have a BBQ grill and helix feed from the AO-40 days. MUCH stronger signal on AO-51, but still had fading. So, circular polarization is not a complete fix. It was interesting listening to both U and S downlinks at the same time...
> From: lucleblanc6 at videotron.ca
> To: amsat-bb at amsat.org
> Date: Mon, 28 Jan 2008 20:52:59 -0500
> Subject: [amsat-bb] Rotor freezing and S mode
> With the actual A0-51 configuration U/S transmitters ON i recheck my BBQ grill performance. As i expected a bumpy ride on S band it was
> exactly what i got! Signal with deep fades from nil to s9+ 60! Did anyone succeed in reducing theses fades? probably attempting to
> circularized the feed can be a part of the solution as i used the original linear feed.
> Guessing the problem i cover the grill with screen mesh at the first installation but i don't know what type of feed will be best for grill
> shape Patch? helix? it will be interesting to see what you are using in a way to kill theses ugly fades.
> Looking for a solution to my KR-500 elevation rotor freezing i succeed at 100% with a simple and cheap battery heating pad available at you
> nearest auto parts store for 25$+- It gives 80 watts and you just have to roll the pad around the rotor casing with a generous layer of
> duct tape. In bonus as you now have AC up the tower you can add a lamp this way you can see your antennas position in the dark making your
> antenna structure even more intriguing for you neighbours...
> P.S. Magnetic heaters are not practical as there is not enough flat and even surface to have a good contact.
> Luc Leblanc VE2DWE
> Skype VE2DWE
> WAC BASIC CW PHONE SATELLITE
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