The square pole part is 30 inches long .
The longest `wings` are 30 inches .

I assume the hookups are the wing nuts in the middle of the zig zags .
There is no complete circuit between anything . The 4 sets of wings are
not connected to anything . I thought UHF or FM was basically a loop .
The way the mounts are it looks like this was supposed to be mounted
standing up but i dont know .

I hooked it to a tv set and it did about as much as rabbit ears . Maybe
something is missing off it .

In article ,
(Ken G.) wrote:

The square pole part is 30 inches long .
The longest `wings` are 30 inches .

I assume the hookups are the wing nuts in the middle of the zig zags .

I wonder about a couple of the details of this antenna, first why are
the reflector elements insulated from the boom? Second and more
interestingly, the placement of the zig-zag elements in front of the
reflector is not symmetrical top to bottom, side to side in the photo, I
wonder what the purpose of this is, if it is to shape the vertical
pattern to somehow maximize the gain when ground reflections are taken
into account?


Regards,

John Byrns

--
Surf my web pages at, http://fmamradios.com/

I wonder about a couple of the details of this antenna, first why are
the reflector elements insulated from the boom?

1) In the Ham world, if the element goes through the boom and is
electrically in contact (shorted) the width of that boom is subtracted from
the total element length when calculating resonance, directors and
reflectors.

2) It may have rotating elements to accommodate shipping and installation.

Those are my guesses.

PP

Neet & purdy

Maybe this will put an ``end`` to this !

Yep .. uh--hu

"Paul P" REMOVE paul @ REMOVE ppinyot . REMOVEcom wrote in message
news:56uii.8076$vG2.5911@trnddc02...
I wonder about a couple of the details of this antenna, first why are
the reflector elements insulated from the boom?

1) In the Ham world, if the element goes through the boom and is
electrically in contact (shorted) the width of that boom is subtracted
from the total element length when calculating resonance, directors and
reflectors.

The way it appears is that the elements are insulated from the boom, and
also broken in the middle, like a dipole would be. If they were active
log elements for the higher VHF channels, I'd expect to see transposing
jumpers interconnecting each set of elements, and also that the elements
lengths would taper... So, those fold up elements make terrible yagi
elements, and they won't work very well as reflectors for the UHF
zig-zag elements. It would be nice to know if that was mounted by
itself on a mast? It looks like a Channel Master design?

Pete

Uncle Peter wrote:
"Paul P" REMOVE paul @ REMOVE ppinyot . REMOVEcom wrote in message
news:56uii.8076$vG2.5911@trnddc02...
I wonder about a couple of the details of this antenna, first why are
the reflector elements insulated from the boom?
1) In the Ham world, if the element goes through the boom and is
electrically in contact (shorted) the width of that boom is subtracted
from the total element length when calculating resonance, directors and
reflectors.

The way it appears is that the elements are insulated from the boom, and
also broken in the middle, like a dipole would be. If they were active
log elements for the higher VHF channels, I'd expect to see transposing
jumpers interconnecting each set of elements, and also that the elements
lengths would taper... So, those fold up elements make terrible yagi
elements, and they won't work very well as reflectors for the UHF
zig-zag elements. It would be nice to know if that was mounted by
itself on a mast? It looks like a Channel Master design?

Pete


Back in the day antenna companies made custom antennas for a specific
area that were combinations for vhf-uhf TV stations. Maybe it's one of
those.

"Ken G." wrote in message
...
The square pole part is 30 inches long .
The longest `wings` are 30 inches .

I assume the hookups are the wing nuts in the middle of the zig zags .
There is no complete circuit between anything . The 4 sets of wings are
not connected to anything . I thought UHF or FM was basically a loop .
The way the mounts are it looks like this was supposed to be mounted
standing up but i dont know .

An antenna for any frequency CAN take pretty much any form. Some are not so
viable.

When you talk about the "wings" do you mean the elements at the back? Are
these 30" total or on one side?

I`m not familiar at all with antenna lingo .
If you look at it strait the zig zags are pretty much centered
The measurements are total across the entire antenna . I am beginning to
wonder if this is part of a big antenna or something . I dont see any
extra holes or broken ends but do see pole mounts . I dont see what good
having no connection between the parts is and its strange why the part
with the wing nuts is floating , not mounted and no signs of it being
mounted . If you pulled very hard on the cable it would bend the zig
zags .

It must have been used before ?? it was sitting on top of the chimeny of
my shop then the wind blew it down the roof far enough so i could snag
it .

I guess it would make an iteresting towel rack .