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RE: [TowerTalk] 160m. Inverted L noise

To: <towertalk@contesting.com>
Subject: RE: [TowerTalk] 160m. Inverted L noise
From: "Rex Lint" <rex@lint.mv.com>
Date: Tue, 2 Mar 2004 10:32:34 -0800
List-post: <mailto:towertalk@contesting.com>
Con,

There MUST be multistrand wire that doesn't have this problem - hams have
been using the stuff for years. I'm not sure what AFAIK means, but I'd hope
it doesn't mean the multistrand stuff that home depot sells for house wiring
(pulled thru conduit).   I've been happy with mine, and K1ZM used it in the
trapped vertical for 160/80/40 that's in "Low Band DXing". But I havent
compared it against a solid conductor vertical.

Rex

Rex Lint, Consultant
26 Brek Drive
Merrimack, NH 03054
PHONE   603-860-7651
HOME    603-889-7650
FAX     603-882-6612

-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com]On Behalf Of
corneliuspaul@gmx.net
Sent: Tuesday, March 02, 2004 1:50 AM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] 160m. Inverted L noise


Hi Jose,


I guess your "flexible wire" is a multistranded wire ('"litz wire")..?

AFAIK multistranded wire can develop the following problem:
the individual tiny little wires oxidize on the surface and this oxide film
acts as little diodes in between the individual wires, which
generates the noise when those little wires rub against each other.

might be what is causing the noise on your inv L.

of course there is no problem on TXing.

I suggest you try putting up the solid wire again and see if the
problem goes away... :-(

73s
Con DF4SA



At 12:36 01.03.2004, op155342c@mail.telepac.pt wrote:
>Just replaced my 160m. Inverted L old 2.5 mm wire with a 6mm flexible wire
>(total length 38.9 meters, Vertical component 14.5 meters)and spite the
>antenna
>seems to be transmitting ok with SWR below 1:1.8 from 1810 to 1870 I
started
>having a S7 noise (that I wipe out using the radio's NB filter), this noise
>wasn't definitelly there with the old 2.5mm wire.
>
>The noise resembles a motobyke noise when working at low RPM and I can't
>figure
>out why Iam catching it now just after I replaced the antenna conductor.
>
>If some of you got a previous experience with this type of antenna any help
to
>help get rider of this noise would be mostly apreciated.
>
>73   Jose  CT1EEB
>_______________________________________________
>
>See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless
>Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with
>any questions and ask for Sherman, W2FLA.
>
>_______________________________________________
>TowerTalk mailing list
>TowerTalk@contesting.com
>http://lists.contesting.com/mailman/listinfo/towertalk

_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.

_______________________________________________
TowerTalk mailing list
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_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless Weather 
Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions 
and ask for Sherman, W2FLA.

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