[TowerTalk] Beverage Antenna Mounted 12' Above Gorund

[David Gilbert]

I run the BOG to keep the wire BELOW the deer.  ;)

And with the monsoon rains we've had here this summer I'd have to run 
the wire about five feet high to stay above the four foot high wiry 
invasive African grasses (four different species) that the cattlemen 
imported several decades ago.  I have a four acre lot and I weedwhack 
about three acres every year to minimize the wildfire danger in the 
spring.  It's going to be a very nasty job this year.

73,
Dave   AB7E



On 9/3/2021 12:05 PM, Richard (Rick) Karlquist wrote:
> Besides the 2 ft vs 10 foot A/B tests, I did some BOG tests.
> The signal out is quite low, but they did work OK and I think
> would be valuable in case I had to run a "stealth" beverage.
> I have 20 acres so I fortunately don't need to resort to that.
> I used 2 ft mainly just to keep them out of the weeds.
>
> BTW, my soil is highly conductive (15 to 30 mS).
>
> 73
> Rick N6RK
>
> On 9/3/2021 11:50 AM, David Gilbert wrote:
>>
>> I could certainly believe that to be the case.  If your ground 
>> conditions are such that the effective reference is not near the 
>> surface, lower is probably better since a Beverage high off the 
>> ground is just an end fed long wire.  As Jim and others have pointed 
>> out, a true Beverage needs reasonable proximity to lossy soil to work 
>> properly.
>>
>> My soil here on this rocky southern Arizona hillside is normally bone 
>> dry, and I suspect (can't prove it though) that my BOG works as well 
>> as if I had it higher off the ground.  I've adjusted the terminating 
>> resistor until I got a constant feed impedance versus frequency 
>> (i.e., a flat line) and it's roughly 400 ohms ... not much different 
>> than the generally accepted value for a standard beverage.
>>
>> 73,
>> Dave  AB7E
>>
>>
>>
>> On 9/3/2021 11:35 AM, Richard (Rick) Karlquist wrote:
>>> The trouble with this question (a FAQ!) is that many
>>> ops have only tried 10 feet because they are constrained
>>> by deer.  They might report "it works great", but they
>>> have not compared it to, say 2 feet, so such data is
>>> of limited value.  On the other hand, I actually set
>>> up two parallel beverages 50 feet apart with a remote
>>> switching relay, and did A/B tests.  At my QTH at least,
>>> 2 feet worked better than 10 feet consistently.  "YMMV", hi.
>>>
>>> BTW, we don't have deer here.
>>>
>>> 73
>>> Rick N6RK
>>>
>>> On 8/31/2021 5:56 PM, RVZ via TowerTalk wrote:
>>>> Wondering if anyone has had good success with a Beverage mounted 
>>>> 12' above ground?  12' is the minimum clearance I need to safely 
>>>> clear a drive way. Please reply direct as I hope to install tomorrow.
>>>>
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