[NLRS] Those wind profiler 222 beams that were available backwhen...

[Jon Platt]

222 yagi elements will roughly be around 23 to 26" in length.  So I would guess that that 10 element yagi is indeed a "222" yagi albeit D8 at 19.25" is pretty short, so its probably a "broadband" 222 yagi intended to cover FM as well.  Probably not optimized for 222 weak signal work, but hey, its got gain!
The antenna with the 33.5" elements appears to be made for something roughly around 176 MHz.   What is there?  Business band?
For the vertical, measure the length of the radials.  They will be 1/4 wavelength on the frequency of interest.  The vertical part is some type of collinear, but the radials are 1/4 wavelength.  
73, Jon


-----Original Message-----
From: Bruce Richardson <w9fz at w9fz.com>
To: nlrs at mailman.qth.net
Sent: Mon, Jul 6, 2020 11:08 pm
Subject: Re: [NLRS] Those wind profiler 222 beams that were available backwhen...

Hi Donn, 

Good point and a tiny bit of data I failed to include.  My notes here say
that on the beefy one that I think is the "wind profiler", the first
director (D1) in front of the DE is 33.5".

On the other antenna that I think is 222 (10-ele), the D1=24" and the
D8=19.25"

I don't expect that to be enough info. I will collect more data the next
time I'm in the barn.
Thanks for your thoughts.
73
Bruce W9FZ


-----Original Message-----
From: nlrs-bounces at mailman.qth.net <nlrs-bounces at mailman.qth.net> On Behalf
Of WA2VOI, Donn
Sent: Monday, July 6, 2020 10:56 PM
To: Bruce Richardson <w9fz at w9fz.com>; nlrs at mailman.qth.net
Subject: Re: [NLRS] Those wind profiler 222 beams that were available
backwhen...

Hi Bruce.

Measurements would help: first three elements (reflector, driven el & 1st
director) and spacing of same.

I don't know of a "wind profiler" in the 220 region but it  possible.  There
is (was ?) one in SW MN at 449 MHz (in the Mil band).  Allocation table says
"Government - Fixed and Mobil" between 225 and 328 MHz and "Non-government"
with no classifier.  A note says "FAA provides air traffic control
communications to the military services on selected frequencies in this
band."  I suppose that could mean wind shear data.  Also, isn't 243 MHz a
military airborne Emergency channel ?

They look like nice antennas, especially the 10 el.

73 Donn
WA2VOI/0


----- Original Message -----
From: "Bruce Richardson" <w9fz at w9fz.com>
To: <nlrs at mailman.qth.net>
Sent: Tuesday, July 07, 2020 2:43 AM
Subject: [NLRS] Those wind profiler 222 beams that were available
backwhen...


> Looking through antennas (in the barn), I find two or 3 antennas that are
> not easy for me to identify.
>
> I was told by the previous owner that one of them was the "222 wind
profiler
> antennas" that were available back 15 years ago or so.
>
> How many elements did those antennas have?  I've got a stout/beefy 6
element
> that I think is the one but I want to be sure.
> http://w9fz.com/tower/profiler_223_vertical_1.jpg
> http://w9fz.com/tower/profiler_223_vertical_b_1.jpg
> http://w9fz.com/tower/profiler_detail_1.jpg
>
> Two other antennas I can't identify. A UHF vertical that I have not
measured
> with an analyzer.
> http://w9fz.com/tower/uhf_vertical_1.jpg
>
> I think this is a 223 antenna, but not sure:
> http://w9fz.com/tower/223_vert_beam_1.jpg
> http://w9fz.com/tower/223_vert_beam_b_1.jpg
> http://w9fz.com/tower/223_vert_beam_detail_1.jpg
>
> Any thoughts on these three?  Thanks for looking.
> 73
> Bruce W9FZ
>
>
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