Topband: 160 meter G5RV

[Mike Waters]

On Wed, Mar 21, 2012 at 10:57 AM, <DnEMoth at aol.com> wrote:

> My brother W2NFK just purchased a G5RV MAX ... Anyone have  any ideas for
> a RF choke
>

I made a common mode choke for a G5RV-style antenna by stacking four 2.4"
OD #31 mix toroids and winding 5 turns of RG-6 through it. It goes on the
coax, right near where the open wire line connects to the coax. Worked
great!

The number of cores and the number of turns depends on what size coax you
use. The design came from K9YC's excellent tutorials on choke baluns, etc.
at http://audiosystemsgroup.com/publish.htm. You want 31 mix ferrite for 80
and 160.

The Mouser part number of the Fair-Rite 31 mix ferrite toroids I used is
623-2631803802. $7 each.

73, Mike
www.w0btu.com