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Today's Topics:
1. separation between 40m rotary dipole and 3 element beam
(Jamie WW3S)
2. Re: separation between 40m rotary dipole and 3 element beam
(George Dubovsky)
3. Re: separation between 40m rotary dipole and 3 element beam (Don)
4. Re: separation between 40m rotary dipole and 3 element beam
(Ron WV4P)
5. Re: separation between 40m rotary dipole and 3 element beam
(Jim Brown)
6. 75 ohm version of the Budwig HQ-1 Dipole dipole adapter
(Martin Flynn)
7. Re: 75 ohm version of the Budwig HQ-1 Dipole dipole adapter
(Jim Brown)
8. Re: 75 ohm version of the Budwig HQ-1 Dipole dipole adapter
(Gary K9GS)
9. Re: separation between 40m rotary dipole and 3 element beam
(J. Hunt)
10. Re: 75 ohm version of the Budwig HQ-1 Dipole dipole adapter
(Jim Brown)
11. Re: 75 ohm version of the Budwig HQ-1 Dipole dipole adapter
(john@kk9a.com)
12. Re: separation between 40m rotary dipole and 3 element beam
(Chuck Dietz)
13. Re: separation between 40m rotary dipole and 3 element beam
(N1BUG)
----------------------------------------------------------------------
Message: 1
Date: Fri, 18 Mar 2022 20:36:23 +0000
From: "Jamie WW3S" <ww3s@zoominternet.net>
To: TowerTalk <TowerTalk@contesting.com>
Subject: [TowerTalk] separation between 40m rotary dipole and 3
element beam
Message-ID: <emc1cc04f4-d191-489b-a80f-5a09844e765b@desktop-eu9mt98>
Content-Type: text/plain; charset=utf-8; format=flowed
What would be an acceptable separation between a 40m rotary dipole and a
3 element beam? I can maybe go 8 ft, 7 for sure......I'm fairly certain
there would be some interaction, but would it be that critical ?
------------------------------
Message: 2
Date: Fri, 18 Mar 2022 17:00:59 -0400
From: George Dubovsky <n4ua.va@gmail.com>
To: Jamie WW3S <ww3s@zoominternet.net>
Cc: TowerTalk <TowerTalk@contesting.com>
Subject: Re: [TowerTalk] separation between 40m rotary dipole and 3
element beam
Message-ID:
<CAALHBrbK+vzP-h=1gPtBeX-pLAjP12_eps=0X6NHvg_pK-92Zw@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
You will almost certainly have to orient the 40 m dipole at 90 degrees to
the beam (parallel with the tri-bander boom) to avoid interaction with 15
meters. 5' separation is usually enough.
73,
geo - n4ua
On Fri, Mar 18, 2022 at 4:36 PM Jamie WW3S <ww3s@zoominternet.net> wrote:
What would be an acceptable separation between a 40m rotary dipole and a
3 element beam? I can maybe go 8 ft, 7 for sure......I'm fairly certain
there would be some interaction, but would it be that critical ?
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
------------------------------
Message: 3
Date: Fri, 18 Mar 2022 14:24:29 -0700
From: Don <w7wll@peak.org>
To: towertalk@contesting.com
Subject: Re: [TowerTalk] separation between 40m rotary dipole and 3
element beam
Message-ID: <1e532c2d-f559-1d92-ce66-fb6a71807173@peak.org>
Content-Type: text/plain; charset=UTF-8; format=flowed
My TH7DXX is at 72 feet. When I had a 2 el 40 up 6 feet above it I
experienced no _discernible_ negative affect on either. Surely there was
some, but not noticeable.
Don W7WLL
On 3/18/2022 2:00 PM, George Dubovsky wrote:
You will almost certainly have to orient the 40 m dipole at 90 degrees to
the beam (parallel with the tri-bander boom) to avoid interaction with 15
meters. 5' separation is usually enough.
73,
geo - n4ua
On Fri, Mar 18, 2022 at 4:36 PM Jamie WW3S<ww3s@zoominternet.net> wrote:
What would be an acceptable separation between a 40m rotary dipole and a
3 element beam? I can maybe go 8 ft, 7 for sure......I'm fairly certain
there would be some interaction, but would it be that critical ?
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
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http://lists.contesting.com/mailman/listinfo/towertalk
------------------------------
Message: 4
Date: Fri, 18 Mar 2022 16:34:27 -0500
From: Ron WV4P <wv4ptn@gmail.com>
To: w7wll@peak.org
Cc: towertalk <towertalk@contesting.com>
Subject: Re: [TowerTalk] separation between 40m rotary dipole and 3
element beam
Message-ID:
<CAPQMqndnCYzFN30noG1Mzgeq1XC89C7QTS17gHQxXUObT--OtA@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
What band is the 3 el beam ?
Ron, WV4P
On Fri, Mar 18, 2022 at 4:25 PM Don <w7wll@peak.org> wrote:
My TH7DXX is at 72 feet. When I had a 2 el 40 up 6 feet above it I
experienced no _discernible_ negative affect on either. Surely there was
some, but not noticeable.
Don W7WLL
On 3/18/2022 2:00 PM, George Dubovsky wrote:
You will almost certainly have to orient the 40 m dipole at 90 degrees to
the beam (parallel with the tri-bander boom) to avoid interaction with 15
meters. 5' separation is usually enough.
73,
geo - n4ua
On Fri, Mar 18, 2022 at 4:36 PM Jamie WW3S<ww3s@zoominternet.net>
wrote:
What would be an acceptable separation between a 40m rotary dipole and a
3 element beam? I can maybe go 8 ft, 7 for sure......I'm fairly certain
there would be some interaction, but would it be that critical ?
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
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http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
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------------------------------
Message: 5
Date: Fri, 18 Mar 2022 15:40:08 -0700
From: Jim Brown <jim@audiosystemsgroup.com>
To: towertalk@contesting.com
Subject: Re: [TowerTalk] separation between 40m rotary dipole and 3
element beam
Message-ID:
<36c3d379-a79d-7782-8af0-078aac2a2df9@audiosystemsgroup.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
On 3/18/2022 1:36 PM, Jamie WW3S wrote:
What would be an acceptable separation between a 40m rotary dipole and a
3 element beam?
The same stub carefully placed as described in this link in the 40M
feedline to suppress the second harmonic of 40M will also kill
interaction of that 40M dipole with 20M. The first link is text, the
second is the slide deck for talks I've done on the technique.
http://k9yc.com/LocatingStubs.pdf
http://k9yc.com/StubPlacement.pdf
73, Jim K9YC
------------------------------
Message: 6
Date: Fri, 18 Mar 2022 19:04:49 -0400
From: Martin Flynn <maflynn@theflynn.org>
To: towertalk@contesting.com
Subject: [TowerTalk] 75 ohm version of the Budwig HQ-1 Dipole dipole
adapter
Message-ID: <e80950b8-dea3-c0fe-0cac-4fc235d1fd10@theflynn.org>
Content-Type: text/plain; charset=UTF-8; format=flowed
Before I re-invent the wheel, anyone aware of a 75 ohm version with an F
connector?
73 Martin
W2RWJ
------------------------------
Message: 7
Date: Fri, 18 Mar 2022 16:14:57 -0700
From: Jim Brown <jim@audiosystemsgroup.com>
To: towertalk@contesting.com
Subject: Re: [TowerTalk] 75 ohm version of the Budwig HQ-1 Dipole
dipole adapter
Message-ID:
<38e32a02-0089-20a5-7f07-988f670c060d@audiosystemsgroup.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
On 3/18/2022 4:04 PM, Martin Flynn wrote:
Before I re-invent the wheel, anyone aware of a 75 ohm version with an F
connector?
F-connectors ARE 75 ohms -- they were developed for the CATV/MATV
industry, which runs on 75 ohms, and their design has gone through
considerable evolution since I first used them in the '70s. Today's
F-connectors are FAR superior to those I installed in Lake Shore Drive
high rises and Sears Tower.
73, Jim K9YC
------------------------------
Message: 8
Date: Fri, 18 Mar 2022 19:23:12 -0400
From: Gary K9GS <k9gs@gjschwartz.com>
To: Martin Flynn <maflynn@theflynn.org>, towertalk@contesting.com
Subject: Re: [TowerTalk] 75 ohm version of the Budwig HQ-1 Dipole
dipole adapter
Message-ID: <mailman.14240.1647684652.2163.towertalk@contesting.com>
Content-Type: text/plain; charset=utf-8
They do not show one on their website?Maybe call them?73,Gary K9GS
-------- Original message --------From: Martin Flynn <maflynn@theflynn.org>
Date: 3/18/22 7:05 PM (GMT-05:00) To: towertalk@contesting.com Subject: [TowerTalk]
75 ohm version of the Budwig HQ-1 Dipole dipole adapter Before I re-invent the wheel,
anyone aware of a 75 ohm version with an F connector?73
MartinW2RWJ______________________________________________________________________________________________TowerTalk
mailing
listTowerTalk@contesting.comhttp://lists.contesting.com/mailman/listinfo/towertalk
------------------------------
Message: 9
Date: Fri, 18 Mar 2022 23:26:48 +0000 (UTC)
From: "J. Hunt" <ki5dq@yahoo.com>
To: "towertalk@contesting.com" <towertalk@contesting.com>, Jim Brown
<jim@audiosystemsgroup.com>
Subject: Re: [TowerTalk] separation between 40m rotary dipole and 3
element beam
Message-ID: <287189407.788084.1647646009005@mail.yahoo.com>
Content-Type: text/plain; charset=UTF-8
Have my 40 meter rotary dipole 8' above the quad band beam, parallel with the
beams boom, opposite side of the mast pipe.?
The opposite side cancels some of the shear forces on the HyGain Tx2 rotor.
Cheers,Jameski5dq
On Friday, March 18, 2022, 05:40:26 PM CDT, Jim Brown
<jim@audiosystemsgroup.com> wrote:
On 3/18/2022 1:36 PM, Jamie WW3S wrote:
What would be an acceptable separation between a 40m rotary dipole and a
3 element beam?
The same stub carefully placed as described in this link in the 40M
feedline to suppress the second harmonic of 40M will also kill
interaction of that 40M dipole with 20M. The first link is text, the
second is the slide deck for talks I've done on the technique.
http://k9yc.com/LocatingStubs.pdf
http://k9yc.com/StubPlacement.pdf
73, Jim K9YC
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
------------------------------
Message: 10
Date: Fri, 18 Mar 2022 16:59:53 -0700
From: Jim Brown <jim@audiosystemsgroup.com>
To: towertalk@contesting.com
Subject: Re: [TowerTalk] 75 ohm version of the Budwig HQ-1 Dipole
dipole adapter
Message-ID:
<48fc3a61-a754-ca4b-991c-608887b3e057@audiosystemsgroup.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Sorry, I misread the original post. :)
73, Jim K9YC
3/18/2022 4:04 PM, Martin Flynn wrote:
Before I re-invent the wheel, anyone aware of a 75 ohm version with an F
connector?
------------------------------
Message: 11
Date: Fri, 18 Mar 2022 21:06:10 -0400
From: <john@kk9a.com>
To: <towertalk@contesting.com>
Subject: Re: [TowerTalk] 75 ohm version of the Budwig HQ-1 Dipole
dipole adapter
Message-ID: <000b01d83b2d$86121a10$92364e30$@com>
Content-Type: text/plain; charset="us-ascii"
I doubt that it exists, it is difficult enough to find the power rating of
an F connector.
John KK9A
Martin Flynn W2RWJ
Before I re-invent the wheel, anyone aware of a 75 ohm version with an F
connector?
73 Martin
W2RWJ
------------------------------
Message: 12
Date: Fri, 18 Mar 2022 20:16:12 -0500
From: Chuck Dietz <w5prchuck@gmail.com>
To: "J. Hunt" <ki5dq@yahoo.com>
Cc: Jim Brown <jim@audiosystemsgroup.com>, "towertalk@contesting.com"
<towertalk@contesting.com>
Subject: Re: [TowerTalk] separation between 40m rotary dipole and 3
element beam
Message-ID:
<CAOk0j1-FLgn4iWbE_vj2ksOn7zuGqgq7mjCndWgr0XN7my02fg@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
I don?t see how putting antennas on the opposite side of the mast does
anything. They are still connected to the same mast and exerting forces in
the same direction according to the wind resistance on either side of the
mast. Visualize mounting the beam on a mast at 5 feet above ground. If you
push on one end of the beam, it exerts the same force on the mast and in
the same direction no matter which side of the mast it is mounted on.
I used to believe this until I thought it through.
Chuck W5PR
On Fri, Mar 18, 2022 at 6:27 PM J. Hunt via TowerTalk <
towertalk@contesting.com> wrote:
Have my 40 meter rotary dipole 8' above the quad band beam, parallel with
the beams boom, opposite side of the mast pipe.
The opposite side cancels some of the shear forces on the HyGain Tx2 rotor.
Cheers,Jameski5dq
On Friday, March 18, 2022, 05:40:26 PM CDT, Jim Brown <
jim@audiosystemsgroup.com> wrote:
On 3/18/2022 1:36 PM, Jamie WW3S wrote:
What would be an acceptable separation between a 40m rotary dipole and a
3 element beam?
The same stub carefully placed as described in this link in the 40M
feedline to suppress the second harmonic of 40M will also kill
interaction of that 40M dipole with 20M. The first link is text, the
second is the slide deck for talks I've done on the technique.
http://k9yc.com/LocatingStubs.pdf
http://k9yc.com/StubPlacement.pdf
73, Jim K9YC
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
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http://lists.contesting.com/mailman/listinfo/towertalk
------------------------------
Message: 13
Date: Sat, 19 Mar 2022 06:10:49 -0400
From: N1BUG <paul@n1bug.com>
To: towertalk@contesting.com
Subject: Re: [TowerTalk] separation between 40m rotary dipole and 3
element beam
Message-ID: <54d6d7ee-2c43-540d-5c25-b4cfd4c49b9b@n1bug.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
The answer is likely "it depends on the specific antennas involved".
Last year I placed an OptiBeam OB1-4030 about 9 feet above my TH11DX. I
did not rotate it 90 degrees. The elements are parallel. I am sure there
is some interaction but I cannot notice a change in pattern or SWR on
any band.
Paul N1BUG
On 3/18/22 17:24, Don wrote:
My TH7DXX is at 72 feet. When I had a 2 el 40 up 6 feet above it I
experienced no _discernible_ negative affect on either. Surely there was
some, but not noticeable.
Don W7WLL
On 3/18/2022 2:00 PM, George Dubovsky wrote:
You will almost certainly have to orient the 40 m dipole at 90 degrees to
the beam (parallel with the tri-bander boom) to avoid interaction with 15
meters. 5' separation is usually enough.
73,
geo - n4ua
On Fri, Mar 18, 2022 at 4:36 PM Jamie WW3S<ww3s@zoominternet.net>? wrote:
What would be an acceptable separation between a 40m rotary dipole and a
3 element beam? I can maybe go 8 ft, 7 for sure......I'm fairly certain
there would be some interaction, but would it be that critical ?
_______________________________________________
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http://lists.contesting.com/mailman/listinfo/towertalk
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------------------------------
Subject: Digest Footer
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------------------------------
End of TowerTalk Digest, Vol 231, Issue 13
******************************************