I can see building this thing, if you lived in the black hole, or
just wanted to run EU in
contests. But only at 50'? I wonder if he modelled it to see
if a shorter antenna @ 70'
would have been better, at that distance?
I DO know that I got my clock cleaned... err, freq. stolen... by
some W5 in arrl SSB, and
didn't understand it until I discovered he was running 8 over 8 @ 90
and 120', fixed into EU.
I wonder what the half power beamwidth of that 16 element longboom
yagi is! Bet it cuts off
parts of Europe you'd like to work.
n2ea
Jim Jarvis, MBA
President-Executive Coach
The Morse Group, LLC
coach@themorsegroup.net
732 548 5573 office
908 410 9130 cell
People-Process-Strategy
Achieving Results in a Changing World
www.themorsegroup.biz
On Mar 29, 2008, at 4:02 PM, towertalk-request@contesting.com wrote:
> Send TowerTalk mailing list submissions to
> towertalk@contesting.com
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://lists.contesting.com/mailman/listinfo/towertalk
> or, via email, send a message with subject or body 'help' to
> towertalk-request@contesting.com
>
> You can reach the person managing the list at
> towertalk-owner@contesting.com
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of TowerTalk digest..."
>
>
> Today's Topics:
>
> 1. Re: 20M 13 EL (Dick Green WC1M)
> 2. Re: Rohn 45 55 anti climb (Roger (K8RI))
> 3. Re: Rohn 45 55 anti climb (Daron Wilson)
> 4. Re: Rohn 45 55 anti climb (Frederick M. Mott)
> 5. Re: Rohn 45 55 anti climb (Dale Martin)
> 6. Re: worlds biggest yagi (David Thompson)
> 7. Re: Rohn 45 55 anti climb (Bruce Jungwirth)
> 8. Favorite GPS receiver? (Steve)
> 9. Re: Favorite GPS receiver? (Roger (K8RI))
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 29 Mar 2008 13:57:05 -0400
> From: "Dick Green WC1M" <wc1m@msn.com>
> Subject: Re: [TowerTalk] 20M 13 EL
> To: "'Rich Hallman - N7TR'" <rich@n7tr.com>, <N7KA@comcast.net>,
> "'TowerTalk'" <towertalk@contesting.com>
> Message-ID: <BAY133-DAV101B717999266D898378C48DF80@phx.gbl>
> Content-Type: text/plain; charset="us-ascii"
>
> Impressive. Must've used a crane and bucket to attach the boom
> sections
> between towers. Don't know when he did this, but it would be tough
> to find
> that many AB-577s at any kind of reasonable price these days.
>
> 73, Dick WC1M
>
>> -----Original Message-----
>> From: Rich Hallman - N7TR [mailto:rich@n7tr.com]
>> Sent: Friday, March 28, 2008 11:47 PM
>> To: N7KA@comcast.net; TowerTalk
>> Subject: Re: [TowerTalk] 20M 13 EL
>>
>> That was WX7M here in Nevada....
>>
>> http://www.w0tm.com/gmcc/WX7Mphotos.htm
>>
>> 73 Rich N7TR
>>
>>
>> -----Original Message-----
>> From: towertalk-bounces@contesting.com
>> [mailto:towertalk-bounces@contesting.com] On Behalf Of
>> N7KA@comcast.net
>> Sent: Friday, March 28, 2008 4:52 PM
>> To: TowerTalk
>> Subject: [TowerTalk] 20M 13 EL
>>
>> I remember seeing a similar long 20M yagi on cover the of CQ Magazine
>> a
>> few years back. Elements supported on old telescoping Army surplus
>> masts.
>>
>> Arne N7KA
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk@contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>>
>>
>
>
>
>
> ------------------------------
>
> Message: 2
> Date: Sat, 29 Mar 2008 14:11:36 -0400
> From: "Roger (K8RI)" <K8RI-on-TowerTalk@tm.net>
> Subject: Re: [TowerTalk] Rohn 45 55 anti climb
> To: Daron Wilson <daron@wilson.org>
> Cc: towertalk@contesting.com
> Message-ID: <47EE8658.9090205@tm.net>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Daron Wilson wrote:
>> Anyone used the Rohn anti climb sheets on 55 or 45? I've got them
>> and a
>> bunch of 55 tower, all I can tell from the sheets is that you
>> stand them up
>> around the tower and sheet metal screw them to each other. I
>> guess you just
>> build this triangle around the base and let it rattle and bang
>> around in the
>> wind?
>>
> Reading your other posts and the reluctance to drill holes in the hot
> dipped galvanized sheeting how about "banding". You are looking at a
> permanent installation, and preferably one that is "Quiet". You might
> have to hunt to find the best material which ranges from painted steel
> (strong but probably not the best in this case) to various synthetics
> which are also strong but I don't know how any particular one would
> stand up to UV. It might be something that would have to be redone
> on a
> periodic basis.
>
> If the sheets are a bit too large to band you could use painted wood
> blocks or even pieces of tires as spacers using care they don't become
> water collectors that could cause rusting of the tower.
>
> You should be able to rent the tools and purchase how ever much
> material
> you use, but not being a high use item they may be difficult to find.
>
> Good luck,
>
> Roger (K8RI)
>>
>>
>> Daron
>>
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk@contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>>
>>
>
>
>
> ------------------------------
>
> Message: 3
> Date: Sat, 29 Mar 2008 11:26:14 -0700
> From: "Daron Wilson" <daron@wilson.org>
> Subject: Re: [TowerTalk] Rohn 45 55 anti climb
> To: "'Roger \(K8RI\)'" <K8RI-on-TowerTalk@tm.net>
> Cc: towertalk@contesting.com
> Message-ID: <010201c891ca$5fa8f9f0$1efaedd0$@org>
> Content-Type: text/plain; charset="us-ascii"
>
>
> Daron Wilson wrote:
>>> Anyone used the Rohn anti climb sheets on 55 or 45? I've got
>>> them and a
>>> bunch of 55 tower, all I can tell from the sheets is that you
>>> stand them
> up
>>> around the tower and sheet metal screw them to each other. I
>>> guess you
> just
>>> build this triangle around the base and let it rattle and bang
>>> around in
> the
>>> wind?
>>>
>> Reading your other posts and the reluctance to drill holes in the hot
>> dipped galvanized sheeting how about "banding". You are looking at a
>> permanent installation, and preferably one that is "Quiet". You
>> might
>> have to hunt to find the best material which ranges from painted
>> steel
>> (strong but probably not the best in this case) to various synthetics
>> which are also strong but I don't know how any particular one would
>> stand up to UV. It might be something that would have to be
>> redone on a
>> periodic basis.
>
>> If the sheets are a bit too large to band you could use painted wood
>> blocks or even pieces of tires as spacers using care they don't
>> become
>> water collectors that could cause rusting of the tower.
>
>> You should be able to rent the tools and purchase how ever much
>> material
>> you use, but not being a high use item they may be difficult to
>> find.
>
> Thanks, as I said I can find many ways to do it better...and have
> on other
> installations. What I'm trying to find, since I can find nothing
> in the
> Rohn catalog about installation of this product, is what the real
> design
> was. Having 100 pounds of sheet metal screwed together and not
> electrically
> bonded to the tower but clanging around the base doesn't sound like a
> reasonable design to me. Yes I could use stainless banding
> material, I
> could make spacers between the product and the tower, and I'll
> likely have
> to make a bonding jumper from each section to the tower ground. If
> you've
> dealt with engineered work, the common statements are 'must be
> installed to
> manufacturer's specifications' and 'must meet all applicable
> codes'. I'm
> trying to head off the question from the electrical engineer when
> he shows
> up to inspect this floating, un-bonded sheet metal around the base
> of the
> tower and asks why it isn't attached and bonded.
>
> Thanks,
>
> Daron N7HQR
>
>
>
> ------------------------------
>
> Message: 4
> Date: Sat, 29 Mar 2008 15:02:37 -0400
> From: "Frederick M. Mott" <ab8ah@embarqmail.com>
> Subject: Re: [TowerTalk] Rohn 45 55 anti climb
> To: "'Daron Wilson'" <daron@wilson.org>, "'Roger \(K8RI\)'"
> <K8RI-on-TowerTalk@tm.net>
> Cc: towertalk@contesting.com
> Message-ID: <000001c891cf$74b780a0$0400000a@zorro>
> Content-Type: text/plain; charset="us-ascii"
>
> I picked up a set of the 45/55 Anti Climb plates from a local ham
> for $110.
> The were unused but I went ahead and had them re-galvanized along
> with 130
> feet of Rohn 45-G tower sections. The plates are quite a few years
> old and
> are very heavy (1.7 mm thickness). The one side has small round holes
> approximately 3.7 mm and the other side that is angled the holes are
> approximately 6.5 mm high and approximated 10 mm wide. I haven't
> used them,
> but if do, I would use threaded SS hex head screws. I don't think
> there
> would be any damage if you don't oversize the bolts. Fred AB8AH
>
> -----Original Message-----
> From: towertalk-bounces@contesting.com
> [mailto:towertalk-bounces@contesting.com] On Behalf Of Daron Wilson
> Sent: Saturday, March 29, 2008 2:26 PM
> To: 'Roger (K8RI)'
> Cc: towertalk@contesting.com
> Subject: Re: [TowerTalk] Rohn 45 55 anti climb
>
>
> Daron Wilson wrote:
>>> Anyone used the Rohn anti climb sheets on 55 or 45? I've got
>>> them and a
>>> bunch of 55 tower, all I can tell from the sheets is that you
>>> stand them
> up
>>> around the tower and sheet metal screw them to each other. I
>>> guess you
> just
>>> build this triangle around the base and let it rattle and bang
>>> around in
> the
>>> wind?
>>>
>> Reading your other posts and the reluctance to drill holes in the hot
>> dipped galvanized sheeting how about "banding". You are looking at a
>> permanent installation, and preferably one that is "Quiet". You
>> might
>> have to hunt to find the best material which ranges from painted
>> steel
>> (strong but probably not the best in this case) to various synthetics
>> which are also strong but I don't know how any particular one would
>> stand up to UV. It might be something that would have to be
>> redone on a
>> periodic basis.
>
>> If the sheets are a bit too large to band you could use painted wood
>> blocks or even pieces of tires as spacers using care they don't
>> become
>> water collectors that could cause rusting of the tower.
>
>> You should be able to rent the tools and purchase how ever much
>> material
>> you use, but not being a high use item they may be difficult to
>> find.
>
> Thanks, as I said I can find many ways to do it better...and have
> on other
> installations. What I'm trying to find, since I can find nothing
> in the
> Rohn catalog about installation of this product, is what the real
> design
> was. Having 100 pounds of sheet metal screwed together and not
> electrically
> bonded to the tower but clanging around the base doesn't sound like a
> reasonable design to me. Yes I could use stainless banding
> material, I
> could make spacers between the product and the tower, and I'll
> likely have
> to make a bonding jumper from each section to the tower ground. If
> you've
> dealt with engineered work, the common statements are 'must be
> installed to
> manufacturer's specifications' and 'must meet all applicable
> codes'. I'm
> trying to head off the question from the electrical engineer when
> he shows
> up to inspect this floating, un-bonded sheet metal around the base
> of the
> tower and asks why it isn't attached and bonded.
>
> Thanks,
>
> Daron N7HQR
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
>
>
> ------------------------------
>
> Message: 5
> Date: Sat, 29 Mar 2008 14:22:18 -0500
> From: "Dale Martin" <kg5u@hal-pc.org>
> Subject: Re: [TowerTalk] Rohn 45 55 anti climb
> To: <towertalk@contesting.com>
> Message-ID: <001801c891d2$3614ed80$6501a8c0@DESKTOP>
> Content-Type: text/plain; charset="US-ASCII"
>
>
> Forgive my bluntness...but...
>
> Maybe you should hire an engineer to consult and provide guidance
> on this
> subject with you.
>
> It's obvious that no one's reply to your query here is what you are
> looking
> for.
>
> 73,
> Dale, kg5u
> (15 years of skirts on two Rohn 45G towers (30miles from the Gulf
> of Mexico)
> and not a clang to be heard or rusting to be seen.)
>
>
>
>
>
> ------------------------------
>
> Message: 6
> Date: Sat, 29 Mar 2008 14:23:02 -0500
> From: "David Thompson" <thompson@mindspring.com>
> Subject: Re: [TowerTalk] worlds biggest yagi
> To: <towertalk@contesting.com>
> Message-ID: <001301c891d2$546a2020$11619a04@yourxb2x7j77gn>
> Content-Type: text/plain; charset="iso-8859-1"
>
> More big yagi's...
>
> WA6ZZK 20 meter long boom (100 foot.
> K4SKI had a 9 el 20 on a 100 foot boom in the early 70's. The
> boom was
> made from Rohn 25.
>
> Dunc Carter then W5IOU made several very long boom 8 element quads for
> himself and W5WMU
> in the late 60's. Dunc also used Rohn 25 for the boom. His
> biggest was on
> a 100 foot boom.
>
> As I recall OH8OS was last seen using stacked beams as his big
> array fell
> down.
>
> Dave K4JRB
>
>
>
>
> ------------------------------
>
> Message: 7
> Date: Sat, 29 Mar 2008 14:42:04 -0500
> From: "Bruce Jungwirth" <k0son@frontiernet.net>
> Subject: Re: [TowerTalk] Rohn 45 55 anti climb
> To: "Daron Wilson" <daron@wilson.org>
> Cc: towertalk@contesting.com
> Message-ID: <005401c891d4$f90ecc50$96f1fea9@yourxhtr8hvc4p>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
>
>
> ----- Original Message -----
> From: "Daron Wilson" <daron@wilson.org>
> To: "'Roger (K8RI)'" <K8RI-on-TowerTalk@tm.net>
> Cc: <towertalk@contesting.com>
> Sent: Saturday, March 29, 2008 1:26 PM
> Subject: Re: [TowerTalk] Rohn 45 55 anti climb
>
>
>>
>> Daron Wilson wrote:
>>>> Anyone used the Rohn anti climb sheets on 55 or 45? .....
> |
>> I'm trying to head off the question from the electrical engineer
>> when he
> shows
>> up to inspect this floating, un-bonded sheet metal around the base
>> of the
>> tower and asks why it isn't attached and bonded.
>>
>> Thanks,
>>
>> Daron N7HQR
>>
>> _
> Daron;
> Since these plates are "ANTI CLIMB SHEETS', by definition they have no
> designed or functional electrical purpose. These are for SAFETY, to
> restrict
> climbing of the tower by unauthorized persons. Therefore any method of
> assembly should be OK as long as the tower is completely covered
> on all 3
> sides the entire length of the sheets. The electrical engineer
> should not
> concern himself with non electrical safety issues. Now, your Liability
> Insurance carrier on the other hand, would be concerned with the
> installation, but only that all sides are covered, they are not easily
> removed, or if hinged, are equipped with a locking mechanism, and are
> determined that they do indeed restrict climbing. (personal Liability
> issues)
>
> Good Luck
> Bruce K0SON
> ______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk@contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>>
>>
>
>
>
>
> ------------------------------
>
> Message: 8
> Date: Sat, 29 Mar 2008 15:43:53 -0400
> From: Steve <steve65@suddenlink.net>
> Subject: [TowerTalk] Favorite GPS receiver?
> To: TowerTalk <towertalk@contesting.com>
> Message-ID: <47EE9BF9.5050108@suddenlink.net>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> I've used a Garmin ETREX for several years to determine latitude and
> longitude of potential new QTH's. Sadly, my son borrowed it a few
> months
> ago and shows no sign of returning it. :-\
>
> So I need to replace it. Any favorites out there for lat and lon
> measurements? I do not particularly need the multi-hundred dollar
> models
> that are commonly used for driving directions in automobiles. Not
> necessarily opposed to them, but don't see spending the bucks if
> something less costly will meet my needs.
>
> Any advice?
>
> Thanks.
>
> Steve K8JQ
>
> --
> Read The Patriot It's Right -- It's Free
> http://PatriotPost.US/subscribe/ Veritas vos Liberabit
>
>
>
>
> ------------------------------
>
> Message: 9
> Date: Sat, 29 Mar 2008 16:02:46 -0400
> From: "Roger (K8RI)" <K8RI-on-TowerTalk@tm.net>
> Subject: Re: [TowerTalk] Favorite GPS receiver?
> To: Steve <steve65@suddenlink.net>
> Cc: TowerTalk <towertalk@contesting.com>
> Message-ID: <47EEA066.8090807@tm.net>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Steve wrote:
>> I've used a Garmin ETREX for several years to determine latitude and
>> longitude of potential new QTH's. Sadly, my son borrowed it a few
>> months
>> ago and shows no sign of returning it. :-\
>>
>> So I need to replace it. Any favorites out there for lat and lon
>> measurements? I do not particularly need the multi-hundred dollar
>> models
>> that are commonly used for driving directions in automobiles. Not
>> necessarily opposed to them, but don't see spending the bucks if
>> something less costly will meet my needs.
>>
>> Any advice?
>>
> Two words,
>
> Google Earth. It'll probably give coordinates closer than the GPS and
> it's free. Besides, for most things I can read them off an
> aeronautical
> chart far closer than ever needed for ham radio.
> BTW I do use on of the new Garmin aviation hand helds, but it's
> usually
> hooked up where I can use the moving map display to good advantage.
>
> 73
> and good luck
>
> Roger (K8RI)
> Roger (K8RI)
>
>> Thanks.
>>
>> Steve K8JQ
>>
>>
>
>
>
> ------------------------------
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
>
> End of TowerTalk Digest, Vol 63, Issue 74
> *****************************************
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|