Thank you Steve. Yes I have many of those FT240-77 cores here. I will wind
one up tonight on the feedline. Easy fix huh?
Mike
----- Original Message -----
From: Steve Dove
To: we0h
Sent: Tuesday, February 28, 2006 9:37
PM
Subject: Re: LF: Common Mode Noise on
Feedline...
Hi Mike,
Bingo. Except you need a whole lot more
than beads will win
you - ideally reactance up into the
kohms. 10-20 turns of
coax around a big lump of 77 or 'J' material
(I use the 2.4
inch toroids Jay was selling a few months ago, though 1.4"
work well, too). This is the Whacking Great Common-Mode
Choke
(W.G.C-M.C.) I mentioned the other night. Should be
at the grounding
point, on the coax going to the receiver,
*not* the
antenna.
Cheers,
Steve
MIKE REID wrote:
> Would adding ferrite beads on the
feedline on a active whip antenna
> lessen the common mode noise issue?
Where would the best place to add
> them if this is a good idea? I was
thinking right at the point where the
> ground wire connection on the
braid is.
>
> Thank you,
>
>
Mike
> WE0H
> WD2XGI on the air 185.3026kc
>
EN35hj
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