FWIW...I needed connectors for the 1/2 aluminum coax
quite a few years ago. I didn't think of K8RI's neat idea
of the brass fittings back then. What I did was to make
an adapter-sleeve with a ~1" length of 1/2" i.d. aluminum tubing.
The tubing fit over the standard PL-259 connector
and the coax.
I found a thick steel washer in the junk box
that is about the same size as the CUTTER WHEEL in a copper tubing
cutter.
I rounded off the edge of the washer and installed it in the
cutter. I then used the "cutter" to ROLL two indented rings
on each end of the aluminum tubing (4 rings total). That worked, but I
found that the aluminum coax was TOO SOFT to "fuse"
to the aluminum sleeve. I solved that problem by making
some hard plastic inserts that "just fit" inside the coax.
I removed the foam inside the coax with a homebrew
hollow "drill" made from a chunk of mild steel so the
inserts could slide in. It worked well and the connections
are still good many years later.
Yeah, you may have to use a small lathe to make the inserts, but I know
some of you have one in your shop. Those inserts may be needed
*IF* you find that the brass compression fittings that Roger used
are somewhat loose when compressed over the soft aluminum
coax.
73,
Charlie, N0TT
On Wed, 07 Nov 2012 18:01:07 -0500 K8RI <K8RI-on-TowerTalk@tm.net>
writes:
> On 11/7/2012 5:32 PM, Tom KD8DEG wrote:
> > I use standard copper pipe compression fittings if the cable is
> the
> > aluminum 75 ohm cabel tv line. They work great.
>
> A couple ways of making adapters.
> http://www.rogerhalstead.com/ham_files/conn.htm
>
> 73
>
> Roger (K8RI)
>
> >
> > Tom KD8DEG
> >
> > ----- Original Message ----- From: "Steve Maki"
> <lists@oakcom.org>
> > To: "towertalk" <towertalk@contesting.com>
> > Sent: Wednesday, November 07, 2012 10:00 AM
> > Subject: Re: [TowerTalk] Fwd: Attach a PL-259 to a 1/2" hardline
> >
> >
> >> Well, they do make female F connectors for anything up to .750,
> but
> >> normally it's terminated with pin connectors. The pin connectors
> >> though are useful as a starting point to transition to UHF.
> >>
> >> -Steve K8LX
> >>
> >> On 11/7/2012 9:49 AM, Jim W7RY wrote:
> >>
> >>> Is this 75 Ohm CATV cable?
> >>>
> >>> If so, there are NO standard adapters or connectors. The cable
> TV
> >>> industry does not use "connectors" on this type of coax. The
> cable
> >>> connects directly to the device through a hole in the side of
> the
> >>> device.
> >>>
> >>> 73
> >>> Jim W7RY
> >>
> >> _______________________________________________
> >>
> >>
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