Topband: RF choke/balun

[Charles Moizeau]

That could be true, but for several years my inverted L (86 feet up and 68 feet out, over 1.5 miles of in-ground radials) is significantly less noisy on receive than my 270-foot center-fed dipole sloping (intentionally) from 83 feet to 7 feet.


Your comments please.


73,


Charles, W2SH

________________________________
From: Topband <topband-bounces at contesting.com> on behalf of Rob Atkinson <ranchorobbo at gmail.com>
Sent: Saturday, September 16, 2017 8:40 AM
To: Arthur Delibert
Cc: topband at contesting.com
Subject: Re: Topband: RF choke/balun

Unless you like listening to noise you don't use an inverted L on 160
(or 80) for receiving.

Rob
K5UJ

On Sat, Sep 16, 2017 at 6:58 AM, Arthur Delibert <radio75a3 at msn.com> wrote:
> I think that’s right if the only issue is your own transmit signal bouncing
> back from the antenna junction and traveling along the exterior of the
> feedline.  But for receiving, I think a choke at each end of the feedline is
> important unless you’re in an exceptionally low noise location.  K9YC
> recommends putting a choke at the antenna end of the feedline, and I’ve
> found it makes quite a difference in the amount of local noise on the
> received signal.  If I understand it right, the outside of the feedline
> picks up the noise signal and carries it to the antenna junction, from where
> it gets mixed in with the desired signal.
>
>
>
>
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