My book has several examples of plumbing store hardline fittings. You can
do just about anything up to 1" stuff with off the shelf fittings and a
barrel connector. I prefer to use reducers rather than pipe to tubing
adapters, but have done both and they do work ok.
David Robbins K1TTT
e-mail: mailto:k1ttt@arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
> -----Original Message-----
> From: towertalk-bounces@contesting.com [mailto:towertalk-
> bounces@contesting.com] On Behalf Of Pete Smith
> Sent: Monday, February 20, 2006 12:57
> To: TOWERTALK@contesting.com
> Subject: Re: [TowerTalk] Fw: CATV Hardline: connectors?
>
> W4AN published the simplest plumbing solution I've seen for 3/4" hardline,
> back in 1995 on towertalk. You use a 1/2" female water pipe to 1/2"
> copper tubing adapter, with an Amphenol barrel. These have a snap-ring
> which you can remove by carefully hacksawing down to the snap-ring groove,
> at which point all the innards can be removed. Silver solder the barrel
> into the copper tubing end of the adapter, with the cut end inside. Cut
> the end of the hardline so that the slightly-spread center part of the
> barrel fits over the center conductor with about the the proper extension
> (trial fit) and solder. Then put the barrel innards back, and thread the
> adapter onto the hardline sheath using Noalox for lubrication, until
> everything lines up.
>
> I have had two of these out in the weather, well but not exceptionally
> taped, for 10 years with no problems.
>
> 73, Pete N4ZR
>
> At 01:29 PM 2/19/2006, K8RI on Tower talk wrote:
>
>
>
> >> Roger,
> >> This is fine, and helpful.
> >> One question: is this coupling an RF connector with a part number and
> >> known
> >
> >Part of it is. The threaded portion is the standard barrell connector
> >(double female) with the threads cleaned off one end and then soldered
> into
> >the back side of the 3/4" connector. I don't remember the part number.
> >
> >The 3/4" adapter is made from 1/2 of a 3/4" compression coupling that we
> cut
> >in two.
> >Compression fittings also come with one end to fit standard pipe threads
> so
> >you could get one to from 1/2" tube to say, 1/2 MPT (Male Pipe Thread)
> which
> >has quite a chunk of brass on the threaded end. Then drill to the proper
> >size and solder in a barrell connector as was done in the photos, or *IF*
> >you can find a set of taps to fit the coax connector you could thread the
> >fitting and just screw in the barrell connector. However each of these
> >approaches adds a bit more work to creating the adapter. While not as
> >elegant the PL-259 in the compression is by far the simpelest.
> >
> > 73
> >
> >Roger (K8RI)
> >
> >> source? Your 3/4 photos seem to indicate that it is an RF connector.
> >> 73 es TNX,
> >> Gordon Beattie, W2TTT
> >> 201.314.6964
> >>
> >> -----Original Message-----
> >> From: K8RI on Tower talk [mailto:k8ri-tower@charter.net]
> >> Sent: Sunday, 19 February, 2006 03:03
> >> To: w2ttt@arrl.net; TOWERTALK@contesting.com
> >> Subject: Re: [TowerTalk] Fw: CATV Hardline: connectors?
> >>
> >>
> >> Unfortunately I don't have a photo of the half inch coupling, although
> if
> >> need be I could make up a connector and shoot some photos (if I can
> find
> >> some half inch stuff.
> >>
> >> The compression coupling is "double ended" and designed to join to 1/2"
> >> tubes. Each end is tapered inside and has a ferrule held in place by
> a
> >> nut. When the nut is tightened the furred is compressed and gets
> smaller
> >> in
> >>
> >> diameter. I use have of a 3.4" coupling and barrel connector to make
> >> fittings for 3/4" hard line. Of that I have some photos.
> >> http://www.rogerhalstead.com/ham_files/conn.htm
> >> They are just about the right size to nicely grab the 1/2" aluminum
> >> hardline shield and the back end of a pl259. Basically I put the back
> end
> >> of the 259 into one end of the coupling and tighten it down keeping the
> >> connector straight. It is a tiny bit undersize and sometimes with want
> to
> >> turn a bit, but it's close enough in size that the fitting will grab it
> >> tightly.
> >>
> >> Come to think of it, I have some couplings and PL259s and that is the
> part
> >> you need to see anyway. I could put one of those together, shoot a
> couple
> >> of photos and just add them to the above page.
> >>
> >> Roger Halstead (K8RI and ARRL 40 year Life Member)
> >> N833R - World's oldest Debonair CD-2
> >> www.rogerhalstead.com
> >>> Roger,
> >>> Do you have a picture?
> >>> I'm not sure what you mean by a 1/2 compression fitting.
> >>> Perhaps you can clarify?
> >>> 73 esTNX!
> >>> Gordon Beattie, W2TTT
> >>> 201.314.6964
> >>>
> >>> -----Original Message-----
> >>> From: towertalk-bounces@contesting.com
> >>> [mailto:towertalk-bounces@contesting.com] On Behalf Of K8RI on Tower
> talk
> >>> Sent: Sunday, 19 February, 2006 01:22
> >>> To: Hector Garcia XE2K; Mike Bragassa, K5UO; towertalk@contesting.com
> >>> Subject: Re: [TowerTalk] Fw: CATV Hardline: connectors?
> >>>
> >>>
> >>>
> >>>
> >>>> Mike:
> >>>> that 1/2 inch 75 ohms cable is very easy to put
> >>>> connectors
> >>>>
> >>>> cut the cable , remove 1 inch of jacket, use a dremel
> >>>> or any other tool that can remove the foam insulator
> >>>> around 3/4 inch deep don't cute or damage the center
> >>>
> >>> I treat it just like installing a pl-259, but add a 1/2 compression
> >>> coupling. Clamp the coax in one end and the pl259 in the other. Leave
> >>> enough
> >>>
> >>> center conductor sticking out to allow soldering to the center pin of
> the
> >>> pl-259. As far as stripping back the foam you have lots of leeway.
> >>>
> >>> I've used that method here with no problems and you don't have the
> >>> trouble
> >>> of cleaning out the foam inside the jacket.
> >>>
> >>> Roger Halstead (K8RI and ARRL 40 year Life Member)
> >>> N833R - World's oldest Debonair CD-2
> >>> www.rogerhalstead.com
> >>>
> >>>
> >>>> , is aluminun copper cladd use an UHF barrel that
> >>>> fit in the center conductor , in this steep , you can
> >>>> desansembly this one and solder the center of the
> >>>> barrel to the center conductor in the coax or just
> >>>> put in under presure , later use a clamp to leave firm
> >>>> the barrel in the soft aluminum of the coax.
> >>>>
> >>>> there in the google you can find several ways to do it
> >>>> , also a copper plumbing option and other similar that
> >>>> works, the one i try to explain is very easy and you
> >>>> don't need a university degree to do it
> >>>>
> >>>> good luck
> >>>>
> >>>> --- "Mike Bragassa, K5UO" <bragassa@consolidated.net>
> >>>> wrote:
> >>>>
> >>>>>
> >>>>> Subject: CATV Hardline: connectors?
> >>>>>
> >>>>>
> >>>>> I was able to pickup 350 feet of "TFC-T10-500JB"
> >>>>> CATV coax for a run to a
> >>>>> 80m vertical I am building.. I see I.C.E. has
> >>>>> transformers for 75-50 Ohm
> >>>>> conversion. Good. Delivery??
> >>>>>
> >>>>> Question: How can I fit PL-259's to this cable?
> >>>>> Where may I locate come
> >>>>> papers on this subject?
> >>>>>
> >>>>> The cable is TFC - T10-500JB
> >>>>>
> >>>>> T10 = type of cable (semi flex) - well, that
> >>>>> depends)
> >>>>> 500 = 1/2" diameter
> >>>>> J = jacketed (black rubber around the aluminum)
> >>>>> B = suitable for direct burial
> >>>>>
> >>>>> Thanks for any suggestions, data sources, etc..
> >>>>>
> >>>>> Mike Bragassa, K5UO
> >>>>> >
> >>>>> _______________________________________________
> >>>>>
> >>>>>
> >>>>>
> >>>>> _______________________________________________
> >>>>> TowerTalk mailing list
> >>>>> TowerTalk@contesting.com
> >>>>>
> >>>> http://lists.contesting.com/mailman/listinfo/towertalk
> >>>>>
> >>>>
> >>>>
> >>>> Hector Garcia XE2K / XF1K
> >>>> Mexicali B.C DM22fp
> >>>>
> >>>> http://www.dxxe.org
> >>>> _______________________________________________
> >>>>
> >>>>
> >>>>
> >>>> _______________________________________________
> >>>> 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
> >>>
> >>
> >> _______________________________________________
> >>
> >>
> >>
> >> _______________________________________________
> >> 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
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|