[TowerTalk] Cage Antenna Construction Hints?

[Jonathan Kaplan]

I'm having trouble visualizing the cage antenna from all the descriptions.
Can anyone point me to a picture, either on the web or in a book?

Thanks & 73
Jonathan

At 11:46 PM 8/26/98 -0400, DavidC wrote:
>
>a coupla years ago W1CW made an awesome looking vertical out of a cage of
>wires which were around rings of PVC pipe.....he took a length of PVC pipe
>and cut it on the saw into a ton of short pieces....mebbe 1/2" or so long
>"pipes" - then attached the wires to one of these spacing them every coupla
>feet.......it looks awesome....as to whether it really adds
>bandwidth...dunno...but gawd it looks really hammy!   73, Jim, K4OJ
>
>
>Jim:
>
>   Found the following on DejaNews, it may be another way to skin that cat!
> :-)
>
>73, DavidC  AA1FA
>
>
>yo3ctk@alltrom.ro (Mihail Mateescu) wrote:
>
>>Hi everybody,
>
>>I wonder if someone has any practical experience with an unusual H.F.
>>antenna: G4ZU "canary cage" quad. I discovered it in an article in Radio
>>REF magazine, March 1978. According to author D. Nicolle, F6AZP, this
>>antenna was invented in 1957 and is covered by several patents
>
>The antenna is called the G4ZU Bird Cage.  The original article was in
>the April 1960 CQ magazine.  The antenna was made commercially along
>with his popular G4ZU 20, 15, 10 minibeam.
>
>The antenna is two full size loops bent back toward mast in a v shape.
>at the top and bottom..the loop is in 4 arms and two sides on each
>element.  G4ZU used a driven element and a reflactor as they are very
>closed space.  The gain is closer to a 2 el quad (about 6Dbd) but if
>one had a tall rotating tower you could put up a great 80 or 160 beam.
>
>I have the G4ZU commercial birdcage and we used it for a number of
>years on Field day with great results.   I am using part of the
>antenna for a W9PNE X-beam on 12
>
>I would be glad to send you a copy iof the CQ article  f you will
>provide an address
>
>73, Dave K4JRB
>
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