You can make a feedline choke with snap-on ferrites as follows: wind 4
turns of the feedline through 5 snap-on cores of Fair-Rite part #0431176451.
The core has an inner diameter of about 3/4 inch and 4 turns of RG-6 is the
limit of what will fit in the core. However, using 5 cores will provide a
large total choking impedance (~10 kohm) on 160. A larger core will accept
more turns but at significantly more cost for the cores. The advantage of
making chokes with RG-179 wound through smaller cylindrical cores is the
much lower cost, although it's a bit more work to make these chokes.
73, John W1FV
-----Original Message-----
From: Topband
[mailto:topband-bounces+john.kaufmann=verizon.net@contesting.com] On Behalf
Of Rich Dailey
Sent: Monday, November 29, 2021 8:14 AM
To: topband@contesting.com
Subject: Topband: W1FV 9-Circle Feedline & control Line Chokes?
Homebrewing a 9-circle vertical array, and I'm looking for opinions from
other 9-circle users on
what chokes you're using on the feedlines (rg-6) at the switch box, and on
the control line. I can go the
binocular core route with rg-174, as per W1FV's article, but would prefer
the simplicity of several turns through a snap-on choke.
tnx!
73 de Rich, N8UX
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