[amsat-bb] Re: Rotor freezing and S mode

Greg D. ko6th_greg at hotmail.com
Wed Jan 30 21:47:33 PST 2008

Hi Luc,

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...

Greg  KO6TH

> 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
> www.qsl.net/ve2dwe
> _______________________________________________
> Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb

Need to know the score, the latest news, or you need your Hotmail®-get your "fix".

More information about the AMSAT-BB mailing list