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Re: [TowerTalk] low band antenna without good ground

To: towertalk@contesting.com
Subject: Re: [TowerTalk] low band antenna without good ground
From: ROBERT HARMON <k6uj@pacbell.net>
Date: Fri, 30 Sep 2011 17:20:27 -0700
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Sounds like the .03 dia aluminum wire probably wouldn't last very long.  I have 
a bunch of rolls of copper coated mig wire for steel welding
that is also .03 inches dia.  Others that have tried this stuff found that it 
rusts very quickly, what a shame you can get 1000 foot rolls of this stuff
pretty cheaply, sigh.................    I read from other posts is that  
electric fence wire works pretty well and is not that expensive either.

Bob
K6UJ


On Sep 29, 2011, at 5:21 PM, Al Kozakiewicz wrote:

> Radiation resistance will not drop, nor would you want it to!  Ground losses 
> will drop and so should the feedpoint impedance.
> 
> The lifetime of buried aluminum depends on the pH of the soil.  Usually, it 
> isn't long.
> 
> Al
> AB2ZY
> 
> -----Original Message-----
> From: towertalk-bounces@contesting.com 
> [mailto:towertalk-bounces@contesting.com] On Behalf Of Alex K2BB
> Sent: Thursday, September 29, 2011 8:15 PM
> To: Gene Smar
> Cc: ROBERT HARMON; <towertalk@contesting.com>
> Subject: Re: [TowerTalk] low band antenna without good ground
> 
> I got a roll of aluminum welding wire, the one which is 0.03"...
> The plan is to lay down 30 radials 30-35 feet long to test how much radiation 
> resistance drops. 
> I am just wondering- how long that wire will last if I bury it? What about 
> thicker wire used for electric fences?
> 
> AM
> 
> On Sep 29, 2011, at 19:39, "Gene Smar" <ersmar@verizon.net> wrote:
> 
>> Bob:
>> 
>>    Instead of a copper ground clamp (likely to cause corrosion at the 
>> connection point due to dissimilar metals in contact in water), I'd 
>> suggest using stainless steel bolts, lockwashers and nuts plus a pair 
>> of fender washers (above and below the screen) wherever you wish to make a 
>> connection.
>> Fender washers are exceptionally large in diameter as compared to 
>> normal washer sizes for the particular diameter of bolt.  They gather 
>> a lot of metal in the connection area when applied.
>> 
>> 
>> 73 de
>> Gene Smar  AD3F
>> 
>> 
>> 
>> 
>> ----- Original Message -----
>> From: "ROBERT HARMON" <k6uj@pacbell.net>
>> To: <towertalk@contesting.com>
>> Sent: Thursday, September 29, 2011 6:36 PM
>> Subject: [TowerTalk] low band antenna without good ground
>> 
>> 
>>> I have been  gathering up materials for rolling out galvanized 
>>> chicken wire for a ground screen from my vertical as discussed here 
>>> recently.  I'm trying to figure out how to make the electrical 
>>> connection at the base of the vertical.  Is there a nifty way to do it ?
>>> My first thought was to take the
>>> very end of each roll and squeeze it together into a bunch and attach 
>>> a cooper clamp used for ground rods.
>>> How do you make your connection ?
>>> 
>>> Bob
>>> K6UJ
>>> 
>>> 
>>> 
>>> _______________________________________________
>>> 
>>> 
>>> 
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>> 
>> 
>> 
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