[ARC5] YG/ZB Demo

[Mike Hanz]

On 7/6/2011 12:06 PM, Jack Antonio wrote:
> My manual for the YG system, says the antenna beam width is about 45
> degrees.
>
> What the manual doesn't show, however, is the antenna pattern. How
> many db down defines the beamwidth. 3db? 20 db?
>
> Mike H mentioned antenna systems  that had parabolic reflectors, my
> YG manual shows a flat screen reflector.  I wonder if the higher power
> of the YE dictated increased front to back ratio?

That's a good question.  It is probably a larger reflector as well.  I 
braved the irritations of my wife's scanner to produce an excerpt on the 
YE/YG/ZB from the NRL history book, which has some good photos.  It's at 
http://aafradio.org/docs/YE-ZB.pdf for those who are so inclined.

73,
Mike  KC4TOS