Whats this antenna for
 

i guess UHF

Whats this antenna for
 

"Ken G." wrote in message
...
i guess UHF

That's an FM antenna from the look of it.

Whats this antenna for
 

I'm guessing UHF. The boom mounts parallel to the vertical
mast; and the "elements" appear to be reflectors. The driver
is some sort of dipole with with odd zig zag elements?

Pete

Whats this antenna for
 

"Ken G." wrote in message
...
i guess UHF

What is the end to end length of the aluminum tubes (reflectors) on the
boom?
That should give us idea of the minimum frequency.

Whats this antenna for
 

That's an FM antenna from the look of it.

Assuming I'm accurately judging its absolute size, it's not big enough to be
a multi-element antenna for 100MHz reception. And I've never seen an FM
antenna with ziggy-zaggys on it.

In case you're wondering... Many years ago I had a huge FM-only antenna
(from Channel Master, I think).

Whats this antenna for
 

"William Sommerwerck" wrote in message
. ..
That's an FM antenna from the look of it.

Assuming I'm accurately judging its absolute size, it's not big enough to
be
a multi-element antenna for 100MHz reception. And I've never seen an FM
antenna with ziggy-zaggys on it.

In case you're wondering... Many years ago I had a huge FM-only antenna
(from Channel Master, I think).



I can't judge the size from the pic, either. I have owned that style of FM
antenna before, hence my observation. You may be right about it being for
UHF, as well.

Whats this antenna for
 

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 .

Whats this antenna for
 

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/

Whats this antenna for
 

William Sommerwerck wrote:
That's an FM antenna from the look of it.

Assuming I'm accurately judging its absolute size, it's not big enough to be
a multi-element antenna for 100MHz reception. And I've never seen an FM
antenna with ziggy-zaggys on it.

In case you're wondering... Many years ago I had a huge FM-only antenna
(from Channel Master, I think).



Mine was a Wineguard...20 elements, IIRC, doubled, with stacking harness
and a rotor on a 30' mast.

jak

Whats this antenna for
 

"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?

Whats this antenna for
 

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 .

Whats this antenna for
 

"Ken G." wrote in message
...
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 .

Ha! And so it would!
I think you are right, it is part of a larger antenna.
Strange looking anyway.
Regards,
Tom

Whats this antenna for
 

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

this antenna Other side
 

Yep .. uh--hu

this antenna folds up
 

Neet & purdy

End of this antenna
 

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

Whats this antenna for
 

"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

Whats this antenna for
 

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.

Whats this antenna for
 

On Sun, 1 Jul 2007 19:58:42 -0600, (Ken G.) wrote:

i guess UHF

The zig-zag part looks like a 6 dipole collinear. If that is the case
the yagi-like elements would act as a reflector.

Whats this antenna for
 

Muzac perhaps or one of those paid elevator music services........


"Registered User" wrote in message
...
On Sun, 1 Jul 2007 19:58:42 -0600, (Ken G.) wrote:

i guess UHF

The zig-zag part looks like a 6 dipole collinear. If that is the case
the yagi-like elements would act as a reflector.

Whats this antenna for
 

Paul P wrote:

Muzac perhaps or one of those paid elevator music services........

"Registered User" wrote in message
...
On Sun, 1 Jul 2007 19:58:42 -0600, (Ken G.) wrote:

i guess UHF

The zig-zag part looks like a 6 dipole collinear. If that is the case
the yagi-like elements would act as a reflector.


It looks like one of the surplused pay TV antennas that were cut for
a single UHF TV channel.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

Whats this antenna for
 

Well we are sure having fun with this .

I should tie a role of string to it then run with it in the wind to see
if it flys . Probably need to stretch a tee shirt over it though .

Whats this antenna for
 

Have you considered running a dip meter past it? Might be revealing...

(Can you even _buy_ dip meters any more?)