My 10 Ghz Experiment, Part - 4

This is the next part on my ongoing experiment with a dish for 10 Ghz.. I have taken the old 6 foot prime feed dish off and converted the experimental stand to fit the large offset dish onto.. Eventually later for EME or moonbounce use when it gets finished.. Lots to do yet though..

[@adewale654]

Most offset antenna are mostly efficient with pointing within or around the horizon tracking.

[@ve7hr142]

Awesome Skip. I think you have all the adjustments there now. Can't wait to see what you do to tweak your Azimuth Drive.

[@americoneto3326]

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[@whiskeymike5154]

Good video Skip. Interesting to see different folks ways of solving the problem of flying these dishes. That sure looked like a prime focus dish, though. Perfectly symmetrical as I could see. According to my understanding, you can't shift the feed too far away from the focus before performance suffers. I'd like to get a dish in the 4 foot range for 10 GHz. But then I'd have to build a mount, and there I would be, cutting metal, drilling holes, and looking a lot like you except with a shorter beard. 73 -- Wayne K3WM

[@gorak9000]

Its definitely an offset dsish. It's a Prodelin 1.8m vsat dish. I think the offset angle is around 23 degrees (from memory i could check the manual to verify). one neat design feature of these dishes is if you put an angle meter on the very bottom rib on the backside of the dish,, that shows you the electrical elevation angle.

[@johnstefl1438]

Love the video Skip, I can't wait to work you on 10 GHz!

[@wseanovostok]

I used the same dish on 10 GHz EME, very efficient antenna for this band.

[@TomTalley]

ee. From the back. And feed is lower...easier to work on...great. I have a c band solid dish that is not circular...might try to make it 10GHz offset...😅

[@VE6BGT]

Hello Tom.. This new dish is a true offset type feed dish, its not a prime dish that I am trying to use as an offset! Now saying that I know one fellow, Barry, VE4MA who has taken sectors of a old TVRO dish and is feeding it as a offset type feed arrangement.. He only has around a quarter of the dish reflector surface mounted etc.. So it can be done, but mine is a true offset.. It looks round but it is oval.. Skip

[@randynelson4472]

How did you know how long the make the feed arms?

[@VE6BGT]

Hello Randy.. There are all kinds of formulas and an actual program that you stick all the dimensions of the dish surface into and it will give you the focal point and angles etc.. So taking that data I drew it into the diagram etc.. Made the feed arms all adjustable for fine tuning later etc.. Skip