Topband: Tower Question

[Jon Zaimes AA1K]

I use similar coils on my series-fed 160-meter Rohn 25 tower. But mine are wound on 6-inch PVC forms, close wound, with about 75 feet of 3/8 inch hardline in the chokes for the 2-meter and 220-mHz packet cluster antennas. About 100 feet of coax or hardline (can't recall which) for the 6-meter beam, also close wound. For the rotor cable, I just wound about 100 feet of the cable on one of the PVC forms (it's an HD-73 Alliance rotator). I do not bond the grounds to the tower, nor to ground on the other side, on the coax or the rotor cable. Have had no problems with the rotor.

Got this idea a few years ago after seeing photos of W8JI's chokes at one of his Dayton talks.

73/Jon AA1K


>X-Original-To: topband at contesting.com
>Delivered-To: topband at contesting.com
>Date: Tue, 21 Oct 2003 16:42:38 -0400
>From: W8AV at aol.com
>To: w0ah at a-1st.net, topband at contesting.com
>
>In a message dated 10/21/2003 11:49:32 AM Eastern Daylight Time, w0ah at a-1st.net writes: >   Is there an easy > way to isolate the cables going up the inside of the tower OR would it be