Hello TTalkers,
I have a 4 Square relay box available which was produced by Colatchco, Inc.
This circuit was then sold to Comtek, who ultimately sold to DX Engineering (I
believe DXE made some modifications to the circuit). The relay box worked
fine last time I used it. I worked many rare DX , including China, both long
and short path on 75m. SSB, from MA.
It comes with Colatchco user info, and some extra plug in relays. And no
manual, in shack, switch, but you will see in the info I have that is an easy
switch to wire in.
Also, you will need (1/4) wave, RG 11. If you don't have that available I
can provide that to you at a discount off list from my DAVIS RF co. Same for
180 degree 8X phase line.
This item is not part of DAVIS RF inventory, as we never sold these, because
Colatchco sold direct. The unit is my personal property and payment would be
made to me, not my company.
The current unit from DXE is advertised at close to $ 400.00 . I can sell
this for $ 225.00 + ship., along with the documentation and extra relays .
I may have the switch for it, just a home made 4 way switch mounted on L
bracket, nothing fancy, but it does what it is supposed to. I can't promise I
can find that as it is at my Cape Cod house, which I moved a crap load of stuff
to and little idea where it may be HI. No charge for it.
You will need to get 12 vdc to the unit, which sits in the center of the 4
square layout. And as I said, I can provide cable for you at discounted rate,
as well as phase cutting of the cable to your designated freq. The phase
cutting I would charge you only my cost on that (we outsource phase cutting due
to small demand).
There is not a cover for the unit. It should not be hard to obtain one, or
fabricate it yourself. Or you can simply mount it inside an upside down pale.
I will warranty the unit to work properly , as long as you test it within 15
days of receipt.
The price is firm, and shipping cost will be added ( its only about 2 lb.).
Cheers, Steve Davis K1PEK.
________________________________
From: TowerTalk <towertalk-bounces@contesting.com> on behalf of
towertalk-request@contesting.com <towertalk-request@contesting.com>
Sent: Sunday, May 21, 2023 12:00 PM
To: towertalk@contesting.com <towertalk@contesting.com>
Subject: TowerTalk Digest, Vol 245, Issue 10
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Today's Topics:
1. Xm240 to moon (BRUCE FORD)
2. Re: Xm240 to moon (marsh@ka5m.net)
3. Re: Xm240 to moon - Link to W6NL_Moxon104.pdf (marsh@ka5m.net)
4. Re: Xm240 to moon - Link to W6NL_Moxon104.pdf (Leeson)
5. Re: Xm240 to moon - Link to W6NL_Moxon104.pdf (marsh@ka5m.net)
6. Glen Martin Addendum (Harry Pliscof)
----------------------------------------------------------------------
Message: 1
Date: Sat, 20 May 2023 14:53:35 -0500
From: BRUCE FORD <ks9u@aol.com>
To: TowerTalk@contesting.com
Subject: [TowerTalk] Xm240 to moon
Message-ID: <8CCF4972-C151-4414-8AFB-F7BBBA7DF5EC@aol.com>
Content-Type: text/plain; charset=utf-8
I know I am late (always) to this but downsizing and replacing the 160 ft
rotating tower with a nice 3el 40 with a 70ft Tristao and a XM240. The band
width is not so great and have been reading about this upgrade. I can find no
actual pictures of the Moxon element fully constructed so I have to assume
looking at tubing lengths each element is about 18ft in total or 9 a side from
the boom. Sorry so stupid?just getting old I guess.If anyone has picture of
element end constructed and mounted that would be great.
Thanks for any help
Bruce K9RO
------------------------------
Message: 2
Date: Sat, 20 May 2023 15:20:06 -0500
From: <marsh@ka5m.net>
To: "'BRUCE FORD'" <ks9u@aol.com>
Cc: <TowerTalk@contesting.com>
Subject: Re: [TowerTalk] Xm240 to moon
Message-ID: <001601d98b58$7867ed00$6937c700$@ka5m.net>
Content-Type: text/plain; charset="utf-8"
See attached.
Hope this helps.
Marsh KA5M
-----Original Message-----
From: TowerTalk <towertalk-bounces@contesting.com> On Behalf Of BRUCE FORD via
TowerTalk
Sent: Saturday, May 20, 2023 2:54 PM
To: TowerTalk@contesting.com
Subject: [TowerTalk] Xm240 to moon
I know I am late (always) to this but downsizing and replacing the 160 ft
rotating tower with a nice 3el 40 with a 70ft Tristao and a XM240. The band
width is not so great and have been reading about this upgrade. I can find no
actual pictures of the Moxon element fully constructed so I have to assume
looking at tubing lengths each element is about 18ft in total or 9 a side from
the boom. Sorry so stupid?just getting old I guess.If anyone has picture of
element end constructed and mounted that would be great.
Thanks for any help
Bruce K9RO
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
------------------------------
Message: 3
Date: Sat, 20 May 2023 15:33:22 -0500
From: <marsh@ka5m.net>
To: "'BRUCE FORD'" <ks9u@aol.com>
Cc: <TowerTalk@contesting.com>
Subject: Re: [TowerTalk] Xm240 to moon - Link to W6NL_Moxon104.pdf
Message-ID: <090601d98b5a$52b9dc10$f82d9430$@ka5m.net>
Content-Type: text/plain; charset="utf-8"
The attachment didn't work, so here's the link:
http://www.k3lr.com/engineering/moxon/W6NL_Moxon104.pdf
Hope this helps.
Marsh KA5M
-----Original Message-----
From: TowerTalk <towertalk-bounces@contesting.com> On Behalf Of BRUCE FORD via
TowerTalk
Sent: Saturday, May 20, 2023 2:54 PM
To: TowerTalk@contesting.com
Subject: [TowerTalk] Xm240 to moon
I know I am late (always) to this but downsizing and replacing the 160 ft
rotating tower with a nice 3el 40 with a 70ft Tristao and a XM240. The band
width is not so great and have been reading about this upgrade. I can find no
actual pictures of the Moxon element fully constructed so I have to assume
looking at tubing lengths each element is about 18ft in total or 9 a side from
the boom. Sorry so stupid?just getting old I guess.If anyone has picture of
element end constructed and mounted that would be great.
Thanks for any help
Bruce K9RO
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
------------------------------
Message: 4
Date: Sat, 20 May 2023 16:03:21 -0700
From: Leeson <leeson@earthlink.net>
To: marsh@ka5m.net, 'BRUCE FORD' <ks9u@aol.com>,
"towertalk@contesting.com" <towertalk@contesting.com>
Subject: Re: [TowerTalk] Xm240 to moon - Link to W6NL_Moxon104.pdf
Message-ID: <afdcee94-99d7-c768-99a0-5a2c07143a35@earthlink.net>
Content-Type: text/plain; charset=utf-8; format=flowed
From W6NL: The history of this antenna begins with my 2003 antenna with
27-foot boom, designed for our 125 mi/h (200 km/h) winds. See
https://www.kkn.net/dayton2004/dayton-2004-antenna-forum.html This
antenna is still in use here. Copies were built by K5MR, K6KR, KZ1W and
others. The K5MR antenna is now at N4BAA.
In 2007, K3LR asked me to modify the design for less wind load than we
have here, for convenience to be built with available parts of the
Cushcraft XM240. See http://www.kkn.net/dayton2007/w6nl_ant.pdf and
http://www.k3lr.com/engineering/ The first try
www.k3lr.com/engineering/moxon/W6NL_Moxon104.pdf<http://www.k3lr.com/engineering/moxon/W6NL_Moxon104.pdf>
was not quite strong
enough for the winds there, so a modified design was made in 2010 as
www.k3lr.com/engineering/moxon/W6NL_Mox_100.pdf<http://www.k3lr.com/engineering/moxon/W6NL_Mox_100.pdf>
In 2012, W2SC asked me
to provide an updated design to use at 8P5A, see
www.k3lr.com/engineering/moxon/W6NL_Mox_Tube_100.pdf<http://www.k3lr.com/engineering/moxon/W6NL_Mox_Tube_100.pdf>
For a discussion of
modeling this type of antenna, see
www.k3lr.com/engineering/moxon/W6NLMoxonModeling.pdf<http://www.k3lr.com/engineering/moxon/W6NLMoxonModeling.pdf>
These have been built by W1UJ and K1KP in a project of the Yankee
Clipper Contest Club, for their own use and for W2SC/8P5A. See
https://w1uj.net/Moxon/ Here you will find many files describing their
work to build these antennas. See particularly K1KP's Dayton talk
https://www.kkn.net/dayton2012/DaytonAntennaPaper05102012.pdf and
https://www.yccc.org/Scuttlebutt/2011/butt2011_10.pdf Also see
https://w1uj.net/Moxon/K1KP/readme.html
In 2014 I was asked by WE9V to update the design to account for some
minor errors he found in the wind calculations. Also, he wanted to make
his antenna from 6-foot (2-meter) lengths of tubing. The antenna was
finished in 2015, see https://www.we9v.com/antennas.htm The element
dimensions for this antenna are in WE9V Moxon 100 mi.pdf and Visio-Moxon
Cushcraft XM240 40M.pdf The dimensions from WE9V are here, from an email
from me to him near the end of his project:
"So in summary, an antenna making good use of XM-240, especially the
expensive bigger sections, has 99 mi/h survival and should have the same
electrical performance as the other W6NL-Moxons. The elements, all with
0.058" wall, are as follows for the reflector, which is the more
stressed element:
1-1/2"x72" EH and EA used as reinforcement, add new 1-1/4"x24" inside
1-3/8"x72" 42" exposed, with reinforcement inner 24"
1-1/4"x48" 45" exposed, EB
1-1/8"x48" 44" exposed, EC
1"x16" 13" exposed, half ED
7/8"x18" 14" exposed, new part
3/4"x6" Reinforced, new, to mount cross element
1/2"x48" 39" exposed , EF (could be more or less)
3/8"x36" 13.25" exposed, half EJ, for proper tip length
For the driven element:
1-1/2"x72" EH and EA used as reinforcement, add new 1-1/4"x18" inside
1-3/8"x72" 42" exposed, with reinforcement inner 15"
1-1/4"x48" 45" exposed, EB
1-1/8"x48" 44" exposed, EC
1"x16" 2" exposed, half ED
7/8"x18" 2" exposed, new part
3/4"x6" Reinforced, new, to mount cross element
1/2"x48" 39" exposed , EF (could be more or less)
3/8"x36" 32.5" exposed, EG, for proper tip length
I hope this is what you were looking for. My grandkids always tell me "TMI."
There are also commercial versions of my design, such as W3JK's JK402T
https://jkantennas.com/jk402t.html, see also
https://ac0c.com/main/page_acc_towersantennas_40m_stack.html The JK402T
has several clever mechanical features, such as the mounting bracket for
the cross elements. But it is expensive, so many hams prefer to build
from scratch. DX Engineering has been rumored to be considering offering
a kit based on my design, but nothing concrete at the moment.
73 de Dave, W6NL/HC8L/P40Q
On 5/20/23 1:33 PM, marsh@ka5m.net wrote:
> The attachment didn't work, so here's the link:
>
> http://www.k3lr.com/engineering/moxon/W6NL_Moxon104.pdf
>
> Hope this helps.
>
> Marsh KA5M
>
>
>
>
> -----Original Message-----
> From: TowerTalk <towertalk-bounces@contesting.com> On Behalf Of BRUCE FORD
> via TowerTalk
> Sent: Saturday, May 20, 2023 2:54 PM
> To: TowerTalk@contesting.com
> Subject: [TowerTalk] Xm240 to moon
>
> I know I am late (always) to this but downsizing and replacing the 160 ft
> rotating tower with a nice 3el 40 with a 70ft Tristao and a XM240. The band
> width is not so great and have been reading about this upgrade. I can find no
> actual pictures of the Moxon element fully constructed so I have to assume
> looking at tubing lengths each element is about 18ft in total or 9 a side
> from the boom. Sorry so stupid?just getting old I guess.If anyone has picture
> of element end constructed and mounted that would be great.
>
> Thanks for any help
>
> Bruce K9RO
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
------------------------------
Message: 5
Date: Sun, 21 May 2023 05:59:54 -0500
From: <marsh@ka5m.net>
To: <leeson@earthlink.net>
Cc: "'BRUCE FORD'" <ks9u@aol.com>, <towertalk@contesting.com>
Subject: Re: [TowerTalk] Xm240 to moon - Link to W6NL_Moxon104.pdf
Message-ID: <01b501d98bd3$60824250$2186c6f0$@ka5m.net>
Content-Type: text/plain; charset="utf-8"
Thank you Dave.
73,
Marsh KA5M
-----Original Message-----
From: Leeson <leeson@earthlink.net>
Sent: Saturday, May 20, 2023 6:03 PM
To: marsh@ka5m.net; 'BRUCE FORD' <ks9u@aol.com>; towertalk@contesting.com
Subject: Re: [TowerTalk] Xm240 to moon - Link to W6NL_Moxon104.pdf
From W6NL: The history of this antenna begins with my 2003 antenna with
27-foot boom, designed for our 125 mi/h (200 km/h) winds. See
https://www.kkn.net/dayton2004/dayton-2004-antenna-forum.html This
antenna is still in use here. Copies were built by K5MR, K6KR, KZ1W and
others. The K5MR antenna is now at N4BAA.
In 2007, K3LR asked me to modify the design for less wind load than we
have here, for convenience to be built with available parts of the
Cushcraft XM240. See http://www.kkn.net/dayton2007/w6nl_ant.pdf and
http://www.k3lr.com/engineering/ The first try
www.k3lr.com/engineering/moxon/W6NL_Moxon104.pdf<http://www.k3lr.com/engineering/moxon/W6NL_Moxon104.pdf>
was not quite strong
enough for the winds there, so a modified design was made in 2010 as
www.k3lr.com/engineering/moxon/W6NL_Mox_100.pdf<http://www.k3lr.com/engineering/moxon/W6NL_Mox_100.pdf>
In 2012, W2SC asked me
to provide an updated design to use at 8P5A, see
www.k3lr.com/engineering/moxon/W6NL_Mox_Tube_100.pdf<http://www.k3lr.com/engineering/moxon/W6NL_Mox_Tube_100.pdf>
For a discussion of
modeling this type of antenna, see
www.k3lr.com/engineering/moxon/W6NLMoxonModeling.pdf<http://www.k3lr.com/engineering/moxon/W6NLMoxonModeling.pdf>
These have been built by W1UJ and K1KP in a project of the Yankee
Clipper Contest Club, for their own use and for W2SC/8P5A. See
https://w1uj.net/Moxon/ Here you will find many files describing their
work to build these antennas. See particularly K1KP's Dayton talk
https://www.kkn.net/dayton2012/DaytonAntennaPaper05102012.pdf and
https://www.yccc.org/Scuttlebutt/2011/butt2011_10.pdf Also see
https://w1uj.net/Moxon/K1KP/readme.html
In 2014 I was asked by WE9V to update the design to account for some
minor errors he found in the wind calculations. Also, he wanted to make
his antenna from 6-foot (2-meter) lengths of tubing. The antenna was
finished in 2015, see https://www.we9v.com/antennas.htm The element
dimensions for this antenna are in WE9V Moxon 100 mi.pdf and Visio-Moxon
Cushcraft XM240 40M.pdf The dimensions from WE9V are here, from an email
from me to him near the end of his project:
"So in summary, an antenna making good use of XM-240, especially the
expensive bigger sections, has 99 mi/h survival and should have the same
electrical performance as the other W6NL-Moxons. The elements, all with
0.058" wall, are as follows for the reflector, which is the more
stressed element:
1-1/2"x72" EH and EA used as reinforcement, add new 1-1/4"x24" inside
1-3/8"x72" 42" exposed, with reinforcement inner 24"
1-1/4"x48" 45" exposed, EB
1-1/8"x48" 44" exposed, EC
1"x16" 13" exposed, half ED
7/8"x18" 14" exposed, new part
3/4"x6" Reinforced, new, to mount cross element
1/2"x48" 39" exposed , EF (could be more or less)
3/8"x36" 13.25" exposed, half EJ, for proper tip length
For the driven element:
1-1/2"x72" EH and EA used as reinforcement, add new 1-1/4"x18" inside
1-3/8"x72" 42" exposed, with reinforcement inner 15"
1-1/4"x48" 45" exposed, EB
1-1/8"x48" 44" exposed, EC
1"x16" 2" exposed, half ED
7/8"x18" 2" exposed, new part
3/4"x6" Reinforced, new, to mount cross element
1/2"x48" 39" exposed , EF (could be more or less)
3/8"x36" 32.5" exposed, EG, for proper tip length
I hope this is what you were looking for. My grandkids always tell me "TMI."
There are also commercial versions of my design, such as W3JK's JK402T
https://jkantennas.com/jk402t.html, see also
https://ac0c.com/main/page_acc_towersantennas_40m_stack.html The JK402T
has several clever mechanical features, such as the mounting bracket for
the cross elements. But it is expensive, so many hams prefer to build
from scratch. DX Engineering has been rumored to be considering offering
a kit based on my design, but nothing concrete at the moment.
73 de Dave, W6NL/HC8L/P40Q
On 5/20/23 1:33 PM, marsh@ka5m.net wrote:
> The attachment didn't work, so here's the link:
>
> http://www.k3lr.com/engineering/moxon/W6NL_Moxon104.pdf
>
> Hope this helps.
>
> Marsh KA5M
>
>
>
>
> -----Original Message-----
> From: TowerTalk <towertalk-bounces@contesting.com> On Behalf Of BRUCE FORD
> via TowerTalk
> Sent: Saturday, May 20, 2023 2:54 PM
> To: TowerTalk@contesting.com
> Subject: [TowerTalk] Xm240 to moon
>
> I know I am late (always) to this but downsizing and replacing the 160 ft
> rotating tower with a nice 3el 40 with a 70ft Tristao and a XM240. The band
> width is not so great and have been reading about this upgrade. I can find no
> actual pictures of the Moxon element fully constructed so I have to assume
> looking at tubing lengths each element is about 18ft in total or 9 a side
> from the boom. Sorry so stupid?just getting old I guess.If anyone has picture
> of element end constructed and mounted that would be great.
>
> Thanks for any help
>
> Bruce K9RO
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
------------------------------
Message: 6
Date: Fri, 19 May 2023 11:58:53 -0400
From: Harry Pliscof <hpliscof@gmail.com>
To: towertalk@contesting.com
Subject: [TowerTalk] Glen Martin Addendum
Message-ID:
<CAJfdkByCjV5N4eFho8VrHks+JcMk4jx7XanMAmi7jDJLhQPuOw@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
Contact info:
k8hp@arrl.net
Sorry for the extra bandwidth
------------------------------
Subject: Digest Footer
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http://lists.contesting.com/mailman/listinfo/towertalk
------------------------------
End of TowerTalk Digest, Vol 245, Issue 10
******************************************
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