I have read alot of info on the concrete for Tom's 25g tower install, but
nothing on the rebar and tying needed before the pour. Rohn website has all the
info.
> From: towertalk-request@contesting.com
> Subject: TowerTalk Digest, Vol 80, Issue 53
> To: towertalk@contesting.com
> Date: Fri, 21 Aug 2009 07:42:45 -0700
>
> Send TowerTalk mailing list submissions to
> towertalk@contesting.com
>
> To subscribe or unsubscribe via the World Wide Web, visit
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> or, via email, send a message with subject or body 'help' to
> towertalk-request@contesting.com
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> You can reach the person managing the list at
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>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of TowerTalk digest..."
>
>
> Today's Topics:
>
> 1. Step-down balun 12.5-50ohm (W1JCW)
> 2. Re: Step-down balun 12.5-50ohm (Jim Brown)
> 3. Re: Step-down balun 12.5-50ohm (Perry - K4PWO)
> 4. Re: How much? (Stan Stockton)
> 5. Re: How much? (Gary E. Jones)
> 6. hybrid quad answer/correction (r miles)
> 7. Re: How much? (john@kk9a.com)
> 8. Re: How much? (mwbesemer@cox.net)
> 9. Re: How much? (Mark Robinson)
> 10. Re: How much? (W5CPT)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 20 Aug 2009 17:35:15 -0500
> From: "W1JCW" <W1JCW@hotmail.com>
> Subject: [TowerTalk] Step-down balun 12.5-50ohm
> To: <towertalk@contesting.com>
> Message-ID: <BLU122-DS6C30EE15732FDBEA6D656F7FD0@phx.gbl>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
> He builds very high quality stuff, I have a few of his things..
>
> Give him a call to discuss what you want, he takes all the time to ensure
> you get what you want.
> He makes all items himself and winds his own.
>
> 73-
> W1JCW
> John
>
> --------------------------------------------------
> From: "W5CPT" <w5cpt@bellsouth.net>
> Sent: Thursday, August 20, 2009 5:17 PM
> To: "Robert Thain" <g0hgw@yahoo.com>; <towertalk@contesting.com>
> Subject: Re: [TowerTalk] Step-down balun 12.5-50ohm
>
> > Robert,
> > If you are looking to have the balun built got to:
> >
> > http://www.balundesigns.com/servlet/StoreFront
> >
> > He can build anything you want reasonably.
> >
> > I have no pecuniary interest in the company, just a satisfied user.
> >
> > Clint - W5CPT
> >
> > ----- Original Message -----
> > From: Robert Thain
> > To: towertalk@contesting.com
> > Sent: Thursday, August 20, 2009 5:14 PM
> > Subject: Re: [TowerTalk] Step-down balun 12.5-50ohm
> >
> >
> > Hi,
> > Yes exactly,
> >
> > I'm looking for 50ohm unbalanced to 12.5ohm balanced.
> >
> > Thanks
> > Robert G0HGW
> >
> > (ps sorry I can't how to reply to a message)
> >
> >
> >
> > Message: 11
> > Date: Thu, 20 Aug 2009 13:57:58 -0500
> > From: "Perry - K4PWO" <k4pwo@comcast.net>
> > Subject: Re: [TowerTalk] Step-down balun 12.5-50ohm
> > To: "jimlux" <jimlux@earthlink.net>, <towertalk@contesting.com>
> > Message-ID: <DFFC789D36F34153B3B0B427DC8E6730@svr>
> > Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> > reply-type=original
> >
> > Just flipping the balun might not work as the Hi-Z side is balanced and
> > the
> > Lo-Z side is unbalanced. Just the reverse of what he probably needs.
> >
> > 73 de Perry - K4PWO
> >
> > ----- Original Message -----
> > From: "jimlux" <jimlux@earthlink.net>
> > To: "Robert Thain" <g0hgw@yahoo.com>
> > Cc: <towertalk@contesting.com>
> > Sent: Thursday, August 20, 2009 13:48 PM
> > Subject: Re: [TowerTalk] Step-down balun 12.5-50ohm
> >
> >
> > > Robert Thain wrote:
> > >> Hello,
> > >>
> > >> I'm looking to build a Step-down balun 12.5-50ohm ie input with 50ohm
> > >> coax and output to 12.5ohm wire.
> > >>
> > >> Can any one point me in the right direction for a plan. I know they
> > exist
> > >> I've seen them for sale.
> > >>
> > >> I have bought a 1:4 50ohm - 200ohm balun, but I think I've messed up,
> > >> its the "wrong way around".
> > >> I hope I can use it for parts.
> > >>
> > >> Thanks
> > >
> > > both of those are 2:1 turns ratio. You just need to flip it around. For
> > > your application, the coax (50 ohm side) goes to the winding with more
> > > turns.
> > > _______________________________
> >
> >
> >
> > _______________________________________________
> >
> >
> >
> > _______________________________________________
> > 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: 2
> Date: Thu, 20 Aug 2009 22:26:59 -0700
> From: "Jim Brown" <jim@audiosystemsgroup.com>
> Subject: Re: [TowerTalk] Step-down balun 12.5-50ohm
> To: "Tower Talk List" <towertalk@contesting.com>
> Message-ID: <20090821052701.12CB659226@gw1.nlenet.net>
> Content-Type: text/plain; charset="us-ascii"
>
> On Thu, 20 Aug 2009 13:57:58 -0500, Perry - K4PWO wrote:
>
> >ust flipping the balun might not work as the Hi-Z side is balanced and the
> >Lo-Z side is unbalanced. Just the reverse of what he probably needs.
>
> It's the circuit, including the antenna and transmission line and coupling to
> surrounding objects that makes an antenna balanced or not. A balun does not
> do
> that.
>
> I suggest that you (and the original poster) study my tutorials on RFI and
> Common Mode Chokes.
>
> http://audiosystemsgroup.com/publish
>
> 73,
>
> Jim K9YC
>
>
>
>
>
>
> ------------------------------
>
> Message: 3
> Date: Fri, 21 Aug 2009 01:12:36 -0500
> From: "Perry - K4PWO" <k4pwo@comcast.net>
> Subject: Re: [TowerTalk] Step-down balun 12.5-50ohm
> To: "Jim Brown" <jim@audiosystemsgroup.com>,
> <towertalk@contesting.com>
> Message-ID: <8ADB47014E714FF3BBCB0B8737AB2FF3@svr>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
> True, but flipping the balun would unbalance the intended balanced side due
> to the ground reference point. I said "might not" because I didn't know his
> antenna feedpoint configuration. My pet peeve is people who insist on
> calling a coax air wound or ferrite bead choke a balun (no balanced to
> unbalanced consideration).
>
> 73 de Perry - K4PWO
>
> ----- Original Message -----
> From: "Jim Brown" <jim@audiosystemsgroup.com>
> To: "Tower Talk List" <towertalk@contesting.com>
> Sent: Friday, August 21, 2009 00:26 AM
> Subject: Re: [TowerTalk] Step-down balun 12.5-50ohm
>
>
> > On Thu, 20 Aug 2009 13:57:58 -0500, Perry - K4PWO wrote:
> >
> >>ust flipping the balun might not work as the Hi-Z side is balanced and the
> >>Lo-Z side is unbalanced. Just the reverse of what he probably needs.
> >
> > It's the circuit, including the antenna and transmission line and coupling
> > to
> > surrounding objects that makes an antenna balanced or not. A balun does
> > not do
> > that.
> >
> > I suggest that you (and the original poster) study my tutorials on RFI and
> > Common Mode Chokes.
> >
> > http://audiosystemsgroup.com/publish
> >
> > 73,
> >
> > Jim K9YC
> >
> >
> >
> >
> > _______________________________________________
> >
> >
> >
> > _______________________________________________
> > TowerTalk mailing list
> > TowerTalk@contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
> >
>
>
>
> ------------------------------
>
> Message: 4
> Date: Thu, 20 Aug 2009 14:39:27 -0500
> From: "Stan Stockton" <stan@aqity.com>
> Subject: Re: [TowerTalk] How much?
> To: "Tom Horton" <k5iid@sbcglobal.net>, "Tower Talk"
> <towertalk@contesting.com>
> Message-ID: <630FBFFC44804E89A434C93D98291133@n42qnuurv8xdmc>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
> Tom,
>
> My opinion is to fill the hole with concrete and put one set of guy
> wires on the tower. Take the guy wires off to lower the quad if needed
> on a calm day.
>
> Stan, K5GO
>
> ----- Original Message -----
> From: "Tom Horton" <k5iid@sbcglobal.net>
> To: "Tower Talk" <towertalk@contesting.com>
> Sent: Thursday, August 20, 2009 12:56 PM
> Subject: [TowerTalk] How much?
>
>
> I am very sure this has been done several if not many times...but...
> How much cement do I really need to install my 40 foot Rohn 25 with a
> two element Cubex quad and make it freestanding.
> I have a 3x3x3 foot hole, but I seriously doubt that it needs to be
> full... or does it?
> Thanks
> Tom K5IID
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
>
>
> ------------------------------
>
> Message: 5
> Date: Fri, 21 Aug 2009 07:31:44 -0500
> From: "Gary E. Jones" <garyejones@cmaaccess.com>
> Subject: Re: [TowerTalk] How much?
> To: <towertalk@contesting.com>
> Message-ID: <023e01ca225b$582a3590$087ea0b0$@com>
> Content-Type: text/plain; charset="us-ascii"
>
> Once you have the hole dug, you really don't have much choice Tom....
> because you want the concrete to come about ground level. Usually, you want
> the concrete 4" or so above surrounding grade. I typically form the top of
> the concrete with 2 x 4 board on their side to give me a 4" height of
> concrete. This concrete can then be worked to make the top of the concrete
> somewhat domed. I want most of the rain to simply roll of the concrete.
>
> So in my opinion, fill the hole and have enough to fill the wood forms at
> the top.
>
> Gary W5FI
>
>
>
>
> -----Original Message-----
> From: towertalk-bounces@contesting.com
> [mailto:towertalk-bounces@contesting.com] On Behalf Of Stan Stockton
> Sent: Thursday, August 20, 2009 2:39 PM
> To: Tom Horton; Tower Talk
> Subject: Re: [TowerTalk] How much?
>
> Tom,
>
> My opinion is to fill the hole with concrete and put one set of guy
> wires on the tower. Take the guy wires off to lower the quad if needed
> on a calm day.
>
> Stan, K5GO
>
> ----- Original Message -----
> From: "Tom Horton" <k5iid@sbcglobal.net>
> To: "Tower Talk" <towertalk@contesting.com>
> Sent: Thursday, August 20, 2009 12:56 PM
> Subject: [TowerTalk] How much?
>
>
> I am very sure this has been done several if not many times...but...
> How much cement do I really need to install my 40 foot Rohn 25 with a
> two element Cubex quad and make it freestanding.
> I have a 3x3x3 foot hole, but I seriously doubt that it needs to be
> full... or does it?
> Thanks
> Tom K5IID
> _______________________________________________
>
>
>
> _______________________________________________
> 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, 21 Aug 2009 9:16:24 -0400
> From: r miles <greenacres113@charter.net>
> Subject: [TowerTalk] hybrid quad answer/correction
> To: antennas <antennas@mailman.qth.net>, towertalk
> <towertalk@contesting.com>
> Message-ID: <20090821091624.Z286K.3763954.root@mp05>
> Content-Type: text/plain; charset=utf-8
>
> I guess I misunderstood how the 'quad' looked in it's true shape. Wx had
> taken it's toll. Plus I found the manual!! I'm sorry I gave a false
> discription. It turns out to be a Butternut HF4B Butterfly Quagi.
> I wonder if anyone out there is still using one of these antennas?
> I'm taking the aluminium tubing to use on a 30m Moxon I'm building. I have
> the coil, hairpins & spiraled wire if someone is in need of them to repair
> one of these antennas. Just cover the postage to ship. Contact me off
> reflector.
> k9il
>
>
> ------------------------------
>
> Message: 7
> Date: Fri, 21 Aug 2009 07:15:52 -0700 (PDT)
> From: "john@kk9a.com" <kk9a@bellsouth.net>
> Subject: Re: [TowerTalk] How much?
> To: towertalk@contesting.com
> Cc: k5iid@sbcglobal.net
> Message-ID: <685305.39242.qm@web83816.mail.sp1.yahoo.com>
> Content-Type: text/plain; charset=us-ascii
>
>
> You should fill the hole with concrete, what else would you put in it? One
> yard is not a lot, but I'm not sure what the minimum concrete delivery is in
> your area. Another other option is to buy 40+ bags of mix, but that could be
> a lot of work.
>
> John KK9A
>
>
> From: "Tom Horton"
> To: "Tower Talk" <towertalk@contesting.com>
> Sent: Thursday, August 20, 2009 12:56 PM
> Subject: [TowerTalk] How much?
>
>
> I am very sure this has been done several if not many times...but...
> How much cement do I really need to install my 40 foot Rohn 25 with a
> two element Cubex quad and make it freestanding.
> I have a 3x3x3 foot hole, but I seriously doubt that it needs to be
> full... or does it?
> Thanks
> Tom K5IID
>
>
>
> ------------------------------
>
> Message: 8
> Date: Fri, 21 Aug 2009 10:21:57 -0400 (EDT)
> From: mwbesemer@cox.net
> Subject: Re: [TowerTalk] How much?
> To: john@kk9a.com
> Cc: towertalk@contesting.com, k5iid@sbcglobal.net
> Message-ID: <11700279.3173.1250864517250.JavaMail.mwbesemer@127.0.0.1>
> Content-Type: text/plain; charset=UTF-8; format=flowed; delsp=no
>
> If you find a contractor (preferably a small one) in your area that does
> concrete work, you might be able to convince him to add a yard or two to
> one of his orders and then just dump it in the hole for you. Sometimes
> they have small jobs too and being able to add a yard or two might save
> him enough of a delivery charge that he'd be willing to help you out.
> The caveat is that you'll need to have your tower in the hole and ready
> for the pour, and the contractor will probably have to be working in
> your area because most concrete companies only let you have the truck
> for a certain period of time.
>
> My dad was a concrete contractor and we did stuff like this all the
> time.
>
> 73,
>
> Mike
> WM4B
>
>
> On Fri, Aug 21, 2009 at 10:15 AM , john@kk9a.com wrote:
>
> > You should fill the hole with concrete, what else would you put in it?
> > One yard is not a lot, but I'm not sure what the minimum concrete
> > delivery is in your area. Another other option is to buy 40+ bags of
> > mix, but that could be a lot of work.
> >
> > John KK9A
> >
> >
> > From: "Tom Horton" To: "Tower Talk" Sent: Thursday, August 20, 2009
> > 12:56 PM
> > Subject: [TowerTalk] How much?
> >
> >
> > I am very sure this has been done several if not many times...but...
> > How much cement do I really need to install my 40 foot Rohn 25 with a
> > two element Cubex quad and make it freestanding.
> > I have a 3x3x3 foot hole, but I seriously doubt that it needs to be
> > full... or does it?
> > Thanks
> > Tom K5IID
> >
> > _______________________________________________
> >
> >
> >
> > _______________________________________________
> > TowerTalk mailing list
> > TowerTalk@contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
>
>
> ------------------------------
>
> Message: 9
> Date: Fri, 21 Aug 2009 10:32:38 -0400
> From: "Mark Robinson" <markrob@mindspring.com>
> Subject: Re: [TowerTalk] How much?
> To: <mwbesemer@cox.net>, <john@kk9a.com>
> Cc: towertalk@contesting.com, k5iid@sbcglobal.net
> Message-ID: <00c601ca226c$3c9a2db0$6600a8c0@hplaptop>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
> When I poured my Rohn 25 tower base in Rockford, there was a concrete guy
> who specialised in small quantities of concrete. One or two yards were
> within his norm and he would stay at the site for 30 minutes while you
> barrowed the concrete as part of the standard charge.
>
> Maybe there is someone like that in your area. Ask one of the concrete
> firms. They know who is working in their business.
>
> Mark N1UK
>
> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
>
>
>
> > If you find a contractor (preferably a small one) in your area that does
> > concrete work, you might be able to convince him to add a yard or two to
> > one of his orders and then just dump it in the hole for you. Sometimes
> > they have small jobs too and being able to add a yard or two might save
> > him enough of a delivery charge that he'd be willing to help you out.
> > The caveat is that you'll need to have your tower in the hole and ready
> > for the pour, and the contractor will probably have to be working in
> > your area because most concrete companies only let you have the truck
> > for a certain period of time.
> >
> > My dad was a concrete contractor and we did stuff like this all the
> > time.
> >
> > 73,
> >
> > Mike
> > WM4B
> > >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
> >
> > On Fri, Aug 21, 2009 at 10:15 AM , john@kk9a.com wrote:
> >
> >> You should fill the hole with concrete, what else would you put in it?
> >> One yard is not a lot, but I'm not sure what the minimum concrete
> >> delivery is in your area. Another other option is to buy 40+ bags of
> >> mix, but that could be a lot of work.
> >>
> >> John KK9A
> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
> >>
> >> From: "Tom Horton" To: "Tower Talk" Sent: Thursday, August 20, 2009
> >> 12:56 PM
> >> Subject: [TowerTalk] How much?
> >>
> >>
> >> I am very sure this has been done several if not many times...but...
> >> How much cement do I really need to install my 40 foot Rohn 25 with a
> >> two element Cubex quad and make it freestanding.
> >> I have a 3x3x3 foot hole, but I seriously doubt that it needs to be
> >> full... or does it?
> >> Thanks
> >> Tom K5IID
> >>
>
>
>
> ------------------------------
>
> Message: 10
> Date: Fri, 21 Aug 2009 09:40:29 -0500
> From: "W5CPT" <w5cpt@bellsouth.net>
> Subject: Re: [TowerTalk] How much?
> To: <towertalk@contesting.com>
> Cc: k5iid@sbcglobal.net
> Message-ID: <013101ca226d$54b750c0$6101a8c0@ClintsLaptop>
> Content-Type: text/plain; charset="iso-8859-1"
>
> In my area, (West Kentucky) there is a concrete company that has a One Yard
> Trailer. You buy the concrete in a covered dump trailer, tow it to your site
> and dump your concrete. Rinse it out and return it. I don't think they charge
> much (if anything) for the use of the trailer.
>
> Clint - W5CPT
>
>
> >>
> >> From: "Tom Horton" To: "Tower Talk" Sent: Thursday, August 20, 2009
> >> 12:56 PM
> >> Subject: [TowerTalk] How much?
> >>
> >>
> >> I am very sure this has been done several if not many times...but...
> >> How much cement do I really need to install my 40 foot Rohn 25 with a
> >> two element Cubex quad and make it freestanding.
> >> I have a 3x3x3 foot hole, but I seriously doubt that it needs to be
> >> full... or does it?
> >> Thanks
> >> Tom K5IID
> >>
>
> _______________________________________________
>
>
>
> _______________________________________________
> 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
>
>
> End of TowerTalk Digest, Vol 80, Issue 53
> *****************************************
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