Joe,
We use a fifty foot length of RG-8X on each of the nine dipoles used at
the W3AO mega-Field Days. We then transition to hundreds of feet of
RG-213 to reach the centrally located tent on our 1000 foot x 200 foot
Field Day site. We use lightweight Budwig insulators and lightweight
dacron rope.
A choke is unnecessary on a monoband dipole, simply grounding the
coax shield approximately 1/4 or 3/4 wavelengths from the feedpoint
is completely adequate. Only a short ground is needed.
73
Frank
W3LPL
----- Original Message -----
From: "Joe" <nss@mwt.net>
To: "Roger (K8RI)" <k8ri@rogerhalstead.com>, rfi@contesting.com
Sent: Thursday, July 18, 2019 1:15:25 PM
Subject: Re: [RFI] Fair-Rite Common Mode Chokes
To change the subject some here,
After a slight mishap at field day, a Dipole fell down in a storm, and a
ceramic insulator hit a cars window and broke it.
So the plan is to make an ultra light set of dipoles. Plastic
insulators, coax fed with 58 size coax. etc.
Now what cores, how many, etc. should I use instead of a heavy balun to
make the choke? Low barefoot rigs 100 watts. so trying to keep things as
light as possible.
Joe WB9SBD
Sig
The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com
http://www.idle-tyme.com
On 7/18/2019 12:22 AM, Roger (K8RI) wrote:
> I (so far) use ferrite cores only for common mode chokes and I've made
> and used many particularly for 160. 75, and 40 center fed slopimg
> dipoles and half slopers.
>
> 73, Roger (K8RI)
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