i guess UHF

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

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

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

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).

"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.

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

"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.

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