Excellent post and the WA4PSC blog on rebuilding the Force 12.
I am going to buy a used 3-element SteppIR, and I want to rebuild to minimize
future maintenance.
I would appreciate advice.
73,
Fred W3ICM
Sent from my iPhone
> On Dec 22, 2019, at 12:00 PM, towertalk-request@contesting.com wrote:
>
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> Today's Topics:
>
> 1. Re: Force12 rebuild (Bryan Swadener)
> 2. Re: Force12 rebuild (Howard Hoyt)
> 3. Force12 rebuild (Jim Thomson)
> 4. Re: Force12 rebuild (Richard Smith)
> 5. Coil 3.77 software (Jim Thomson)
> 6. Source For Antenna Materials (Jim Brown)
> 7. FW: Re: Force12 rebuild (Gary K9GS)
> 8. Re: Force12 rebuild (N4ZR)
> 9. Re: Force12 rebuild (Chuck Tifft)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 21 Dec 2019 17:37:26 +0000 (UTC)
> From: Bryan Swadener <bswadener@yahoo.com>
> To: towertalk@contesting.com
> Subject: Re: [TowerTalk] Force12 rebuild
> Message-ID: <1169730302.1469574.1576949846216@mail.yahoo.com>
> Content-Type: text/plain; charset=UTF-8
>
> I'm using nickel-copper wire rope on the 40m linear loaded elements of my F12
> C-4XL. McMaster-Carr has 7x7-strand 1/16" diameter for $1.24/ft (#3453T32).
> Bryan WA7PRC:
> ----------------------------------------------------------------------
>
> Date: Fri, 20 Dec 2019 14:01:20 -0600
> From: N5KM - Kris <n5kilomike@gmail.com>
> Subject: [TowerTalk] Force12 rebuild
>
>
> Hi all,
>
> I'm rebuilding my Force12 40m yagi. What would you recommend as replacement
> for the alumoweld linear loading wires? Some of these wires have snapped in
> the past due to years of vibration.
>
> Note: as part of the rebuild I am adding truss supports for the 3 elements
> in order to remove the stress on the linear loading wires.
>
> 73,
>
> Kris N5KM
>
> ------------------------------
>
> Message: 2
> Date: Sat, 21 Dec 2019 14:59:37 -0500
> From: Howard Hoyt <hhoyt@mebtel.net>
> To: towertalk@contesting.com
> Subject: Re: [TowerTalk] Force12 rebuild
> Message-ID: <fb5e9e5e-f058-0001-048a-393984b48ca6@mebtel.net>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> Hi Kris,
>
> I went through this a few years back and published a blog on the process
> including links to materials:
>
> https://proaudioeng.com/force-12-c-4sxl-rebuild/
>
> Good luck and have fun!? I did...
> Howie / WA4PSC
>
>
>
> ------------------------------
>
> Message: 3
> Date: Sat, 21 Dec 2019 14:13:06 -0800
> From: "Jim Thomson" <jim.thom@telus.net>
> To: <towertalk@contesting.com>
> Subject: [TowerTalk] Force12 rebuild
> Message-ID: <DF68363E78854A25B4AF943B8B8D8DEF@DESKTOPSV54DBH>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Date: Fri, 20 Dec 2019 14:01:20 -0600
> From: N5KM - Kris <n5kilomike@gmail.com>
> To: "towertalk@contesting.com" <towertalk@contesting.com>
> Subject: [TowerTalk] Force12 rebuild
>
>
> <Im rebuilding my Force12 40m yagi. What would you recommend as replacement
> <for the alumoweld linear loading wires? Some of these wires have snapped in
> <the past due to years of vibration.
>
> <Note: as part of the rebuild I am adding truss supports for the 3 elements
> <in order to remove the stress on the linear loading wires.
>
> <Kris N5KM
>
> ## replace the LL alumoweld fubar with hb coils... like either al or
> cu. Use dacron rope for the
> new truss supports.
>
> ## Dont even think about using SS wire..... the losses are beyond sky
> high. It will break anyway, cuz of metal fatigue.
> Stranded CU wire would work, but hb coils are simpler.
>
> Jim VE7RF
>
>
> ------------------------------
>
> Message: 4
> Date: Sat, 21 Dec 2019 22:26:59 +0000 (UTC)
> From: Richard Smith <n6kt1@sbcglobal.net>
> To: towertalk@contesting.com
> Subject: Re: [TowerTalk] Force12 rebuild
> Message-ID: <2072892177.2383792.1576967219856@mail.yahoo.com>
> Content-Type: text/plain; charset=UTF-8
>
> Hi Jim,
> Sorry to sound dumb, but what is an hb coil?
> 73, Rich, N6KT
> On Saturday, December 21, 2019, 02:13:15 PM PST, Jim Thomson
> <jim.thom@telus.net> wrote:
>
> Date: Fri, 20 Dec 2019 14:01:20 -0600
> From: N5KM - Kris <n5kilomike@gmail.com>
> To: "towertalk@contesting.com" <towertalk@contesting.com>
> Subject: [TowerTalk] Force12 rebuild
>
>
> <Im rebuilding my Force12 40m yagi. What would you recommend as replacement
> <for the alumoweld linear loading wires? Some of these wires have snapped in
> <the past due to years of vibration.
>
> <Note: as part of the rebuild I am adding truss supports for the 3 elements
> <in order to remove the stress on the linear loading wires.
>
> <Kris N5KM
>
> ##? replace the? LL alumoweld? fubar? with hb? coils...? like? either? al?
> or? cu.? Use? dacron? rope? for the
> new? truss supports.
>
> ##? Dont? even? think? about using SS? wire..... the losses are beyond? sky?
> high.? It? will? break? anyway,? cuz? of? metal fatigue.
> Stranded? CU wire? would? work,? but hb coils are simpler.
>
> Jim? VE7RF?
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
>
> ------------------------------
>
> Message: 5
> Date: Sat, 21 Dec 2019 14:32:01 -0800
> From: "Jim Thomson" <jim.thom@telus.net>
> To: <towertalk@contesting.com>
> Subject: [TowerTalk] Coil 3.77 software
> Message-ID: <5113EDC308D746DDBBD0445A90FC4B1F@DESKTOPSV54DBH>
> Content-Type: text/plain; charset="iso-8859-1"
>
>
> Coil 3.77 is now available.... replaces coil 3.72
>
> http://ham-radio.com/k6sti/coil.zip
>
>
> Jim VE7RF
>
> ------------------------------
>
> Message: 6
> Date: Sat, 21 Dec 2019 15:04:58 -0800
> From: Jim Brown <jim@audiosystemsgroup.com>
> To: towertalk reflector <towertalk@contesting.com>
> Subject: [TowerTalk] Source For Antenna Materials
> Message-ID:
> <a37794d8-93af-9a46-097f-290d5b39a792@audiosystemsgroup.com>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> A member of the VHF Slack group recommended this source for antenna
> materials.
>
> https://www.onlinemetals.com/
>
> 73, Jim K9YC
>
>
> ------------------------------
>
> Message: 7
> Date: Sat, 21 Dec 2019 20:58:52 -0600
> From: Gary K9GS <garyk9gs@wi.rr.com>
> To: "towertalk@contesting com" <towertalk@contesting.com>
> Subject: [TowerTalk] FW: Re: Force12 rebuild
> Message-ID: <mailman.33.1577034004.30226.towertalk@contesting.com>
> Content-Type: text/plain; charset=utf-8
>
> Sorry all..I replied off list by mistake.73,Gary K9GS
> -------- Original message --------
>
>
>
>
>
> On Saturday, December 21, 2019, 10:03:29 AM PST, GaryK9GS
> <garyk9gs@wi.rr.com> wrote:
>
>
>
> I asked a friend who has had a?EF-420/240 up for probably 20
> years.? His reply:"I have not changed the wire. Should I need to in the
> future, I would use #14 copperweld as I think this wire would be as strong as
> the aluminumweld used by F12. Might be good, however, to check on mechanical
> specs of the copper clad steel wire.This loading wire also acts as truss
> wires to physically support the elements."Climate is southern WI so plenty of
> snow, ice, and temps from below 0 to 100 degrees.73,Gary K9GS--------
> Original message --------From: Bryan Swadener via TowerTalk
> <towertalk@contesting.com> Date: 12/21/19 11:37 AM (GMT-06:00) To:
> towertalk@contesting.com Subject: Re: [TowerTalk] Force12 rebuild I'm using
> nickel-copper wire rope on the 40m linear loaded elements of my F12 C-4XL.
> McMaster-Carr has 7x7-strand 1/16" diameter for $1.24/ft (#3453T32).Bryan
> WA7PRC:
> ----------------------------------------------------------------------Date:
> Fri, 20 Dec 2019 14:01:20 -0600F
r
> om: N5KM - Kris <n5kilomike@gmail.com>Subject: [TowerTalk] Force12 rebuildHi
> all,I'm rebuilding my Force12 40m yagi. What would you recommend as
> replacementfor the alumoweld linear loading wires? Some of these wires have
> snapped inthe past due to years of vibration.Note: as part of the rebuild I
> am adding truss supports for the 3 elementsin order to remove the stress on
> the linear loading wires.73,Kris N5KM?
> ______________________________________________________________________________________________TowerTalk
> mailing
> listTowerTalk@contesting.comhttp://lists.contesting.com/mailman/listinfo/towertalk
>
>
>
> ------------------------------
>
> Message: 8
> Date: Sat, 21 Dec 2019 22:14:16 -0500
> From: N4ZR <n4zr@comcast.net>
> To: TowerTalk <TowerTalk@contesting.com>
> Subject: Re: [TowerTalk] Force12 rebuild
> Message-ID: <b0128dfa-515e-895e-55a1-713b609b4faf@comcast.net>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> In fact, I believe F12 in later years made the 40M single-band antennas
> (called the Delta line) with coils in place of the linear loading.? That
> said, I had one up at 104 feet for 15 years with the original alumoweld
> wire, and zero issues
>
> 73, Pete N4ZR
> Check out the Reverse Beacon Network
> at <http://reversebeacon.net>, now
> spotting RTTY activity worldwide.
> For spots, please use your favorite
> "retail" DX cluster.
>
>> On 12/21/2019 5:26 PM, Richard Smith wrote:
>> Hi Jim,
>> Sorry to sound dumb, but what is an hb coil?
>> 73, Rich, N6KT
>> On Saturday, December 21, 2019, 02:13:15 PM PST, Jim Thomson
>> <jim.thom@telus.net> wrote:
>>
>> Date: Fri, 20 Dec 2019 14:01:20 -0600
>> From: N5KM - Kris <n5kilomike@gmail.com>
>> To: "towertalk@contesting.com" <towertalk@contesting.com>
>> Subject: [TowerTalk] Force12 rebuild
>>
>>
>> <Im rebuilding my Force12 40m yagi. What would you recommend as replacement
>> <for the alumoweld linear loading wires? Some of these wires have snapped in
>> <the past due to years of vibration.
>>
>> <Note: as part of the rebuild I am adding truss supports for the 3 elements
>> <in order to remove the stress on the linear loading wires.
>>
>> <Kris N5KM
>>
>> ##? replace the? LL alumoweld? fubar? with hb? coils...? like? either? al?
>> or? cu.? Use? dacron? rope? for the
>> new? truss supports.
>>
>> ##? Dont? even? think? about using SS? wire..... the losses are beyond? sky?
>> high.? It? will? break? anyway,? cuz? of? metal fatigue.
>> Stranded? CU wire? would? work,? but hb coils are simpler.
>>
>> Jim? VE7RF
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> 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: 9
> Date: Sun, 22 Dec 2019 06:23:34 -0800
> From: Chuck Tifft <chuckw6rd@yahoo.com>
> To: towertalk@contesting.com
> Subject: Re: [TowerTalk] Force12 rebuild
> Message-ID: <96971ca5-5b96-fe66-5401-ff0c3f665d3d@yahoo.com>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> Converted mine? a couple years back to Coils from N6BT Antennas. He also
> supplied the needed tubing for the conversion and I think it all came to
> less than $300.
>
> Chuck W6RD
>
>> On 12/21/2019 7:14 PM, N4ZR wrote:
>> In fact, I believe F12 in later years made the 40M single-band
>> antennas (called the Delta line) with coils in place of the linear
>> loading.? That said, I had one up at 104 feet for 15 years with the
>> original alumoweld wire, and zero issues
>>
>> 73, Pete N4ZR
>> Check out the Reverse Beacon Network
>> at <http://reversebeacon.net>, now
>> spotting RTTY activity worldwide.
>> For spots, please use your favorite
>> "retail" DX cluster.
>>
>>> On 12/21/2019 5:26 PM, Richard Smith wrote:
>>> ? Hi Jim,
>>> Sorry to sound dumb, but what is an hb coil?
>>> 73, Rich, N6KT
>>> ???? On Saturday, December 21, 2019, 02:13:15 PM PST, Jim Thomson
>>> <jim.thom@telus.net> wrote:
>>> ? ? Date: Fri, 20 Dec 2019 14:01:20 -0600
>>> From: N5KM - Kris <n5kilomike@gmail.com>
>>> To: "towertalk@contesting.com" <towertalk@contesting.com>
>>> Subject: [TowerTalk] Force12 rebuild
>>>
>>>
>>> <Im rebuilding my Force12 40m yagi. What would you recommend as
>>> replacement
>>> <for the alumoweld linear loading wires? Some of these wires have
>>> snapped in
>>> <the past due to years of vibration.
>>>
>>> <Note: as part of the rebuild I am adding truss supports for the 3
>>> elements
>>> <in order to remove the stress on the linear loading wires.
>>>
>>> <Kris N5KM
>>>
>>> ##? replace the? LL alumoweld? fubar? with hb? coils...? like either?
>>> al? or? cu.? Use? dacron? rope? for the
>>> new? truss supports.
>>>
>>> ##? Dont? even? think? about using SS? wire..... the losses are
>>> beyond? sky? high.? It? will? break? anyway,? cuz? of? metal fatigue.
>>> Stranded? CU wire? would? work,? but hb coils are simpler.
>>>
>>> Jim? VE7RF
>>> _______________________________________________
>>>
>>>
>>>
>>> _______________________________________________
>>> 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
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk@contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>
>
> ------------------------------
>
> Subject: Digest Footer
>
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> TowerTalk@contesting.com
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> ------------------------------
>
> End of TowerTalk Digest, Vol 204, Issue 20
> ******************************************
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