On 1/30/2016 9:51 AM, gareth wrote:
"amdx" wrote in message
...
On 1/30/2016 6:04 AM, gareth wrote:
One of the problems with beams is the cable winding around
the mast if you try to turn too far in one way or another.

These difficulties have long been solved in the world of radar,
so, has anyone conceived of an infinitely rotatable 50 ohm
coupling for our beam antennae?

Clearly there would have to be some mechanical support other than
just the co-axial coupling to withstand the wind storms that we are all
now experiencing?
Rotary Transformer
These will keep you occupied for a while.

http://coefs.uncc.edu/mnoras/files/2...Chapter_19.pdf
https://www.pes.ee.ethz.ch/uploads/t...r_APEC2013.pdf
http://www.fdk.co.jp/cyber-e/pdf/RT-RTE001.pdf


Ta, but not what I had in mind, which was a rotary co-axial joint




http://www.macartney.com/what-we-off...50-and-75-ohm/

http://www.schleifring.com/ship-radar/

https://www.asianproducts.com/produc...ings-meet.html

http://www.moog.com/literature/MCG/AC6355DS.pdf

http://www.moog.com/products/slip-ri...psules/ac6305/

http://www.slipring.com/series-high-...-273-l-en.html

Power levels could be a problem.