Oops, should have read:
The only RFI problems I had
were from antenna placement, not the feedline radiating.
K9MI
.
----- Original Message -----
From: "Mike Brown" <k9mi@sbcglobal.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Sunday, July 10, 2005 02:21
Subject: Re: [TenTec] "Radiates like Crazy"???? No
In rental houses, where you can't put up a tower, my favorite antenna was
the longest dipole I could use (generally around 80m length) fed with 450
ohm twin lead all the way back to the tuner. The only RFI problems I had
were from antenna placement, not the antenna. But, I think it's already been
said here already, but if you use a balanced antenna, with a balanced load
(make sure both legs are equal length) you shouldn't have any problems. Some
of you may remember the article back in the 80's I think by Lew McCoy W1ICP
who wrote antenna articles for CQ magazine. He said if your dipole comes out
to 102', call it a G5RV. If it's anything else call it a "Real McCoy". I
always enjoyed reading his articles.
73, Mike K9MI
----- Original Message -----
From: "Kirby Van Horn" <k7ec@sbcglobal.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Friday, July 08, 2005 19:54
Subject: Re: [TenTec] "Radiates like Crazy"???? No
AMEN!!!! Same Here!!
Kirby, K7EC
----- Original Message -----
From: "Bill Rowlett" <kc4atu@hotmail.com>
To: <tentec@contesting.com>
Sent: 08 July, 2005 14:33
Subject: Re: [TenTec] "Radiates like Crazy"???? No
> No he is not wrong. I have had more problems with TVI when using coax.
> NEVER
> with ladder line or 300ohm twin lead.
>
> kc4atu
>
>>From: Curt <k3ey@yahoo.com>
>>Reply-To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
>>To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
>>Subject: Re: [TenTec] "Radiates like Crazy"???? No
>>Date: Fri, 8 Jul 2005 11:44:51 -0700 (PDT)
>>
>>I don't care if you do or don't...you're
>>wrong!!!!!!!!!!
>>
>>--- Stuart Rohre <rohre@arlut.utexas.edu> wrote:
>>
>> > I must respectfully disagree that ladder line
>> > "radiates like crazy".
>> >
>> > It is BALANCED line, that means if it is fed from a
>> > balanced source and goes
>> > to a balanced antenna, the currents are equal and
>> > opposite in each wire and
>> > their fields cancel within a few diameters of the
>> > line. See the theory of
>> > transmission lines in the ARRL Handbooks.
>> >
>> > It should cross conductors at right angles, and
>> > should be twisted every 18
>> > inches or so, to minimize effects from nearby
>> > conductors that could
>> > unbalance it.
>> >
>> > If you ever have ladder line "radiating" you are mis
>> > applying it in some way
>> > at one end or the other. Balanced antennas are
>> > center fed beams, dipoles,
>> > etc. with line brought off at 90 degrees to the
>> > antenna wires.
>> >
>> > Let's bury these old wive's tales about balanced
>> > parallel transmission
>> > lines.
>> >
>> > Stuart
>> > K5KVH
>> >
>> >
>> >
>> > _______________________________________________
>> > TenTec mailing list
>> > TenTec@contesting.com
>> > http://lists.contesting.com/mailman/listinfo/tentec
>> >
>>
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