Likewise here. 2nd floor shack without special grounding.
Bob W3YY
---- john@kk9a.com wrote:
> I also have a 2nd floor station, I have no RF ground. W8JI has information
> in his site regarding second floor grounding
> http://www.w8ji.com/second_floor_grounding.htm
>
> John KK9A
>
> To: towertalk@contesting.com
> Subject: [TowerTalk] FIRST TOWER & 2ND FLOOR SHACK --HELP
> From: Wayne Willenberg
> Date: Wed, 7 Aug 2013 09:22:03 -0400
>
> My *first tower* (a 100’ crank-up including the mast) is scheduled to
> arrive in mid-October. It will be located 150’ from the base of my house.
>
> The problem is, *my shack is located on the second floor of my house*. So,
> all cables that will go to and from the tower first go through the second
> floor wall, down the exterior wall (a distance of about 20’) to a central
> grounding point.
>
> I just finished reading a technical note from PolyPhaser called “Ham Radio
> Station Protection.” It suggested for my situation (i.e., shacks that are
> above the basement) that coax, ground strap and rotor cables that run
> vertically up my outside wall Might inductively couple some energy from the
> tower, if it was struck by lightning, to the shack.
>
> The article suggested having all of the cables go through surge protectors
> at the base of the tower and then run through EMT (electrical metal tubing)
> that is grounded to the tower base *only *and runs all the way from the
> tower base to the second floor shack. The article says the EMT will act
> like a *Faraday shield* for the cables inside.
>
> I can understand this approach for the vertical run up the exterior wall of
> my house, but does it make sense to use EMT all the way from the tower?
> How about the 2” ground strap that will run from the ground protection
> system around the base of the tower to my shack. Following this logic,
> shouldn’t it be inside the EMT?
>
> Any help would be greatly appreciated.
>
> Wayne, KK6BT
>
> _______________________________________________
>
>
>
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