[Boatanchors] Ferrite Chokes

[James Liles]

Hi again Keith:

Don't know how difficult it is to get to the antenna feed point but here is
a thought that you might entertain if you are really fussy about your
antenna.  Simply add a mast mounted or hanging  balun.  That way both halves
of the antenna wire will participate.  Couple of advantages.  The antenna
will be a bit less susceptible to noise and there will be a very slight bit
of gain from driving both wires.  Also would significantly reduce RF on the
shield --- wouldn't have to use the cores at the antenna.  If the coax is
not 90 degrees from the antenna, I would still use the snap on cores but at
the entry to the shack.

Just a thought --- the cores will be just fine though.

Good luck Keith and let us know how all works out.

Kindest regards Jim K9AXN

--------------------------  Original 
message ----------------------------------------

Message: 1
Date: Mon, 16 Jul 2012 11:25:36 -0400
From: "Keith Densmore" <kmd at xplornet.ca>
Subject: Re: [Boatanchors] Ferrite Chokes
To: <boatanchors at mailman.qth.net>
Message-ID: <FC2A0A80A16645AABA4B7B15F935A631 at keith3dc125020>
Content-Type: text/plain; charset="iso-8859-1"

>>> Might be interesting to put the antenna up without any choke or
>>> ferrite and see how it works out......


Thanks to a kind suggestion from one of the list members, I have ordered a 
set of beads from Palomar. The advantage of these is I do not have to 
disassemble the coax connectors to install.

I used to use a multi wire dipole without balun, located not too far from 
the house without any RF feedback issues. Not so with the Off center fed 
dipole which is totally unbalanced, and without a choke causes lots of RF 
back into the shack. I guess there is no such thing as 'free lunch'.

73

Keith ve3ts