[TowerTalk] Beverage Antenna

[Roger (K8RI) on TT]

That's why I have the  HB and Antenna HB on the same machine as the 
mail.  Items, topics, and components are so much easier and faster to 
find than with hard print.  Less than 10 keystrokes to find nearly any 
specifics on a topic. Course as some of my answers have shown, I'm too 
lazy to always double check!

I can't say the computer is smaller, lighter, or cheaper at 60#, 23"H X 
7.5"W X 20" D, running 8  64 bit cores/CPUs @ 4.1 GHz, & 16 GB of  RAM 
and cost less than half our first color TV. OTOH  the Internet has been 
a POS this past week, so I'm glad I had most of the data here.  Still, 
with posted links on mans news groups, they came up invalid (err 404) 
even from news sites and some ham pages were taking so long to load they 
timed out.  I don't think I was getting more than a fraction of the 100 
Mbs service I pay for.

Speaking of "pay for" and I think this is relevant to hams who depend on 
electricity... My electric use in the shop has been down this past year 
and on the equalized billing plan It almost doubled last month (with 
less use)  I think I smell a rate increase a coming.

73

Roger  (K8RI)


On 2/2/2015 2:14 PM, Jim Brown wrote:
> On Mon,2/2/2015 10:05 AM, Don wrote:
>> First, I'm surprised there does not seem to be any published 
>> measurements taken at a common test site of a Beverage at various 
>> heights and lengths (such as done with yagi's, and other antennas on 
>> test ranges). 
>
> Why do you assume that nothing like this exists? Beverages have been 
> around for nearly a century, and it is quite likely that there's a lot 
> of published work that you haven't looked for in scientific journals. 
> It's also possible to model antennas like this and do your own study. 
> There's a lot about Beverages (and other RX antennas) in the ON4UN 
> book, and in the ARRL Antenna Book.
>
> Email reflectors like this one should not be a substitute for pulling 
> out the books and studying them. Many of us who post answers to 
> questions like this have done that study, or done that modeling, or 
> built those antennas, and are sharing what we've learned. As VE7RF has 
> noted, optimum height is a function of wavelength. When a Beverage is 
> higher than that, it doesn't stop working, like throwing a switch, it 
> just becomes less effective. My 550 ft Beverages, a full wavelength on 
> 160M, at an average height of 5-6 ft, are quite effective on 40M, and 
> are still working on 20M! How do I know? I run diversity with my K3 
> using the TX dipole at 125 ft into the main RX and the Beverage into 
> the second RX.
>
> 73, Jim K9YC
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-- 

73

Roger (K8RI)


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