Towertalk
[Top] [All Lists]

[TowerTalk] 40 & 17M Interaction when stacking

To: <towertalk@contesting.com>
Subject: [TowerTalk] 40 & 17M Interaction when stacking
From: jduncan@nol.net (John T. Duncan)
Date: Mon, 28 Dec 1998 21:17:12 -0600
This is a multi-part message in MIME format.

------=_NextPart_000_0039_01BE32A7.6F5AC720
Content-Type: text/plain;
        charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

I am considering stacking a KT34XA, 12/17 duo-bander and Cushcraft 2el =
40 in that order with the tribander on the bottom on a 20 ft mast (16ft =
out of top of tower).  I thought I had it all figured out by keeping the =
tribander and 40m beam as far apart as possible...But NO.....

Now I have read a couple of reports of interaction between 17 and 40 =
meters!  Apparently one of the 40m elements is 1/2 wavelength at 18mhz.=20

I am open to comments and ideas.  I can only do one tower.  I currently =
have up a KT34XA and the goal is  to maintain my current signal on the =
three bands while picking up 12/17 and 40.  I am not hung up on any one =
antenna in terms of manufacture and will consider others than the ones I =
have mentioned.  Has anyone done the stack I want to duplicate?  =
Gentlemen, any ideas or comments?  Please reply direct to me as I do not =
want to tie up reflector.

73...John WA5ZVE

------=_NextPart_000_0039_01BE32A7.6F5AC720
Content-Type: text/html;
        charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD W3 HTML//EN">
<HTML>
<HEAD>

<META content=3Dtext/html;charset=3Diso-8859-1 =
http-equiv=3DContent-Type>
<META content=3D'"MSHTML 4.72.3110.7"' name=3DGENERATOR>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT size=3D2>I am considering stacking a KT34XA, 12/17 duo-bander =
and=20
Cushcraft 2el 40 in that order with the tribander on the bottom on a 20 =
ft mast=20
(16ft out of top of tower).&nbsp; I thought I had it all figured out by =
keeping=20
the tribander and 40m beam as far apart as possible...But =
NO.....</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>Now I have read a couple of reports of interaction =
between 17=20
and 40 meters!&nbsp; Apparently one of the 40m elements is 1/2 =
wavelength at=20
18mhz. </FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>I am open to comments and ideas.&nbsp; I can only do =
one=20
tower.&nbsp; I currently have up a KT34XA and the goal is&nbsp; to =
maintain my=20
current signal on the three bands while picking up 12/17 and 40.&nbsp; I =
am not=20
hung up on any one antenna in terms of manufacture and will consider =
others than=20
the ones I have mentioned.&nbsp; Has anyone done the stack I want to=20
duplicate?</FONT><FONT size=3D2>&nbsp; Gentlemen, any ideas or =
comments?&nbsp;=20
Please reply direct to me as I do not want to tie up =
reflector.</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>73...John WA5ZVE</FONT></DIV></BODY></HTML>

------=_NextPart_000_0039_01BE32A7.6F5AC720--


--
FAQ on WWW:               http://www.contesting.com/towertalkfaq.html
Submissions:              towertalk@contesting.com
Administrative requests:  towertalk-REQUEST@contesting.com
Problems:                 owner-towertalk@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm


<Prev in Thread] Current Thread [Next in Thread>