[TowerTalk] Teflon Coax with Center That's NOT SCCCS?

Tue Jan 16 23:56:58 EST 2018

I concur with Paul.
I have been doing this for over 40 years with one exception.

Rather than soldering the braid and then trimming it after soldering I found
that trimming the braid with a pair of electricians scissors so that nothing
hangs over the end of the adaptor works best. Trim and then comb the
remaining braid with a small pick so that no strands overlap each other then
trim again as some will still be sticking out after combing.
Then solder the braid to the end of the adaptor. Sometimes a file may be
needed to get rid of any excess solder.

The braid is prepped the same way that you would with a clamp on N
connector.

Screw the adaptor and cable into the PL259 and tighten the adaptor with two
pairs of pliers. No more soldering needed on the adaptor other than the
center conductor.
If ever needed the center conductor can be unsoldered and the connector can
be taken apart for inspection.

73
Gary  K4FMX

> -----Original Message-----
> From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of
> Paul Christensen
> Sent: Tuesday, January 16, 2018 8:21 PM
> To: 'towertalk reflector'
> Subject: Re: [TowerTalk] Teflon Coax with Center That's NOT SCCCS?
> 
> >"For those that do not want to build their own, DX Engineering makes
> various lengths of jumpers using RG400 with Amphenol 83-1SP UHF male
> connectors..."
> 
> Tim,
> 
> Since RG-400 requires a UG reducer with a male PL-259 UHF connector, DXE
> may
> want to consider this ultra-superior method of connector installation
> when
> fabricating cable for its customers:
> 
> https://www.dxzone.com/qsy12138-install-a-pl-259-on-an-rg-8x
> 
> Although I now prefer crimped connectors for inside installation, the
> method
> linked above is far better than anything I've tried.  Everyone I know
> who
> has tried it has never gone back old installation methods.  There's
> complete
> control over the entire process with the ability to fully inspect the
> connector as the barrel is screwed onto the reducer.  That's difficult
> with
> the age-old "Amphenol Method."
> 
> Paul, W9AC
> 
> 
> 
> -----Original Message-----
> From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of
> Tim
> Duffy
> Sent: Tuesday, January 16, 2018 8:56 PM
> To: 'Christopher Brown' <cbrown at woods.net>; 'Stan Stockton'
> <wa5rtg at gmail.com>; jim at audiosystemsgroup.com
> Cc: 'towertalk reflector' <towertalk at contesting.com>
> Subject: Re: [TowerTalk] Teflon Coax with Center That's NOT SCCCS?
> 
> For those that do not want to build their own, DX Engineering makes
> various
> lengths of jumpers using RG400 with Amphenol 83-1SP UHF male connectors
> (very high quality)on both ends. Hi pot tested and silver soldered -
> ready
> to go.
> 
> The double shield with RG400 works great.
> 
> The K3LR station (11 operating positions) uses all RG400 jumpers.
> 
> 73
> Tim K3LR
> 
> -----Original Message-----
> From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of
> Christopher Brown
> Sent: Tuesday, January 16, 2018 8:34 PM
> To: Stan Stockton; jim at audiosystemsgroup.com
> Cc: towertalk reflector
> Subject: Re: [TowerTalk] Teflon Coax with Center That's NOT SCCCS?
> 
> 
> Real M17/128-RG400 spec RG400
> 
> There are a bunch of "RG400"ish cables our there, so I only buy known
> maker
> with milspec id on jacket.
> 
> I have about 100feet of Harbor M17/128-RG400 around, from 3 or 4 diff
> sources.  I use for "choke in box", test leads, rotator loops for 6M and
> down, etc.
> 
> Spent forever searching, but ended up settling on milspec RG400, and I
> found
> some UT-141 milspec cable that is raw copper shield, with silver plated
> copper center instead of SCCS.  (There seem to be about 40 sub-versions
> of
> UT141, 3 or 4 have a silver plated copper center instead of SCCS).
> 
> Above 6M for rotator loops and similar I like M17/127-RG393, but hard to
> find at a reasonable price.
> 
> 
> Suggest hitting the auctions and specifically looking for M17/128-RG400
> where you can clearly see Harbor Industries and M17/128-RG400 on the
> jacket,
> took some shopping but I don't think I paid more than $1/foot for the
> several hundred feet I purchased over the last few years, just had to
> watch
> and wait for a decent deal on a 30+ft length.
> 
> If you only need a few feed once, it is always around in 10 - 20ft
> lengths
> for several times that.
> 
> On 1/16/18 03:02, Stan Stockton wrote:
> > RG-400
> >
> > Silver plated stranded center
> >
> > 1" bend radius
> >
> > .195" OD
> >
> > 50 ohms
> >
> > Choice by many for chokes
> >
> > Stan, K5GO
> >
> > Sent from Stan's IPhone
> >
> >
> >
> >> On Jan 16, 2018, at 12:13 AM, Jim Brown <jim at audiosystemsgroup.com>
> wrote:
> >>
> >> All the 0.195-in o.d. TFE coax cables I can find have a center
> >> conductor
> that is silver-coated copper-coated steel. This is fine above HF, but
> it's
> not great for 160M and 80M, where the steel is contributing to loss.
> >>
> >> Can anyone point me to a 50 ohm TFE 0.195-in o.d. cable whose center
> >> is
> NOT coated steel?
> >>
> >> Likewise, they all have a solid center with a 2-in bend radius.
> >> Anyone
> know of one with a smaller bend radius?
> >>
> >> 73, Jim K9YC
> >>
> >>
> >> _______________________________________________
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> >>
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