Stovepipe tape?? Tacky. Use aluminum pop rivets. I used them and had no
problems for the 7 years that my 4 square was up. If you're worried about
conductivity between the two adjoining sections, just run more power!!
Bob W6TR
----- Original Message -----
From: "Rick Karlquist" <richard@karlquist.com>
To: "Red" <RedHaines@centurytel.net>
Cc: "TowerTalk" <towertalk@contesting.com>; "Gary Schafer"
<garyschafer@comcast.net>
Sent: Saturday, November 04, 2006 2:18 AM
Subject: Re: [TowerTalk] Questions about Irrigation Pipe for Verticals
> You can use aluminum stovepipe tape to bridge the gap.
>
> Rick N6RK
>
>
>
> Red wrote:
>> Hi, Gary;
>>
>> The coupling between a 2" OD and a 2.9" ID (the two pipes) is 46
>> picoFarads per foot. Guess we better put in the aluminum connections.
>> The reactance of 46 pF is 124 Ohms at 28 MHz and 870 Ohms at 4 MHz, at
>> one foot of overlap. Hope I didn't lose a decimal place. It's
>> bedtime! Better double check my calculations.
>>
>> 73 de Red
>> _______________________________________________
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>>
>
>
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