[TenTec] RF Ground

[Gary Hoffman]

Exactly....any reasonable bonding wire is a better solution than using the 
coax.


----- Original Message ----- 
From: "Bob McGraw - K4TAX" <RMcGraw at Blomand.net>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Tuesday, April 07, 2009 12:33 PM
Subject: Re: [TenTec] RF Ground


> Do remember that lightning protection must be done outside of the 
> structure.
> Lightning protection outside, disconnect inside.
>
> If you rely on the coax shield between the tower site and the house, then
> the shield IS your bond.  Not good unless you want your equipment in the
> current path.  I view this as a guaranteed failure mode.
>
> 73
> Bob, K4TAX
>
>
> ----- Original Message ----- 
> From: "Jim Brown" <k9yc at audiosystemsgroup.com>
> To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
> Sent: Tuesday, April 07, 2009 10:59 AM
> Subject: Re: [TenTec] RF Ground
>
>
>> Gary Smith wrote:
>>> I would need 400' of copper pipe or the 18" wide of copper plate to
>>> run from the ground rods at the base of the Inv-L to the service
>>> entrance and I'm not going to do that. The cost is not realistic and
>>> the salty environment would corrode the copper in no time.
>>>
>> It is a mistake to think "all or nothing" with respect to the 18-inch
>> copper or copper pipe. Nothing wrong with those recommendations, but
>> something like #10 or #6 copper is FAR better than NOTHING between two
>> points that should definitely be bonded. #10 copper can be had at Home
>> Depot and Lowe's at reasonable prices.
>>> I will though look into the Polyphasers and can you suggest a model
>>> number of ferrite for the coax? I'd be happy to add that to what I
>>> have.
>>>
>> I already have. Download and study the tutorial.
>>> My habit is to disconnect coax when I leave the house. I was a novice
>>> in 79 and just bought a brand new Kenwood for my first radio. My
>>> college allowed me to string up a center fed zepp between the tops of
>>> two dorms. I left it connected when I went to class, it got hit and
>>> my top of the line radio that was all of two weeks old was fried when
>>> I came back. Lesson learned to disconnect.
>> Many authorities consider that a half-way measure that can still cause
>> problems. In the case of a strike, there will be massive voltages on
>> that disconnected wire, which can arc to something and start a fire.
>> Better to ground it properly.  W8JI is quite adamant about this, and I
>> can't find any fault with his logic.
>>
>> 73,
>>
>> Jim Brown K9YC
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>
>
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