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Ever Hear Of A Rotator?

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CK-722
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Ever Hear Of A Rotator?

Post by CK-722 » Sun Mar 22, 2020 2:56 am

I could understand if this was for an MATV system, but this just looks like a house.

Image


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Same (x, y, z), different (t)

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audiophile
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Re: Ever Hear Of A Rotator?

Post by audiophile » Sun Mar 22, 2020 6:17 am

Those are mostly ham beams. Bottom is 6 meter. The next two are 2-meter, then it looks at 440 MHz, 220, 440...


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CK-722
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Re: Ever Hear Of A Rotator?

Post by CK-722 » Sun Mar 22, 2020 1:18 pm

It's hard to judge the dimensions. They do look like European models. I've seen some of these designs on the K6STI site designed/cut for TV and FM. But that explains why there are no obvious preamps. They must be to contact various repeaters. Maybe they are in a remote area or valley. What's the box? Remote controlled antenna switch or just a combiner?


Is THAT where they got the idea for the 486-SX?

Same (x, y, z), different (t)

Your bullet missed my trial balloon.

RTN Price. Not guaranteed. As of 12:30, 157.71 Down 0.22.

Artificial Intelligence is a Child that needs a Parent to guide it through.

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audiophile
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Re: Ever Hear Of A Rotator?

Post by audiophile » Sun Mar 22, 2020 6:18 pm

The box is Internet most likely.


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k8jd
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Re: Ever Hear Of A Rotator?

Post by k8jd » Mon Mar 23, 2020 11:01 am

audiophile wrote:
Sun Mar 22, 2020 6:17 am
Those are mostly ham beams. Bottom is 6 meter. The next two are 2-meter, then it looks at 440 MHz, 220, 440...
Ha Ha Ha, kidding? those are single channel VHF TV and top is UHF FOR TV reception.
Y. Pretty efficient if you know exactly what distant stations hyou want to see. My 6 M Yagi has elements ten ft long and all my amateur band antennas have a ragular dipole config driven elements with Gamma match for 50 Ohm feedline, NOT a Folded dipole that is suited to 300 Ohm Twin lead feedlines. With the TV band repacking and channel shifts going on they are mostly usless now !@



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audiophile
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Re: Ever Hear Of A Rotator?

Post by audiophile » Mon Mar 23, 2020 12:35 pm

They're not Cushcraft, but that doesn't mean in Europe they don't have different vendors and designs. This doesn't look like the USA.

There is plenty of designs the use folded dipole for the driven element for transmit. Gamma match is poor way to do it for high power.


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Ben Zonia
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Re: Ever Hear Of A Rotator?

Post by Ben Zonia » Mon Mar 23, 2020 7:03 pm

All this analysis that we have done, bottom to top.

1. A Channel 5 plus or minus single channel or 4-6 Yagi.

2&3. A long single channel or 7-13 Yagi antenna with dual reflectors.

4&6. A UHF Yagi with dual reflectors.

5. A short single channel or 7-13 Yagi with single reflector. Driven element may be dislocated.


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