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'[EE]: BNC on RG-59'
2001\02\22@130033 by Sean Breheny

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Hi everyone,

A quick question: I have to put some crimp-on Amphenol male BNC
connectors on RG-59 coax. I bought the crimp tool which they specified
for the task, but I'm still not sure of the exact procedure. I've done
solder-on PL-259's before, but not crimp-on BNCs.

The connector comes in 4 pieces: a main body, a small metal tube just
slightly larger than the coax, a tiny gold-plated center pin, and a
little (teflon?) piece which is pretty much a little button with a hole
in the center and a rim around it. This last piece is the one the puzzles
me, where does it go?

THanks,

Sean

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2001\02\22@133540 by Dan Michaels

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Sean Breheny wrote:

>A quick question: I have to put some crimp-on Amphenol male BNC
>connectors on RG-59 coax. I bought the crimp tool which they specified
>for the task, but I'm still not sure of the exact procedure. I've done
>solder-on PL-259's before, but not crimp-on BNCs.
.....
>


Ahh, it does my heart good to see that phd [???] students don't
know how to crimp a wire :). [guess they're doing something right
in our educational systems].

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2001\02\22@134158 by Sean Breheny

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Hi Dan,

Actually, I'm not a PhD student, I'm an undergrad (senior). And, yes, I
have used crimp tools for other types of connectors before.

So, are you just going to make remarks or ar you going to tell me how to
do it? :-)

Sean


On Thu, 22 Feb 2001, Dan Michaels wrote:

{Quote hidden}

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2001\02\22@135203 by Dan Michaels

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Sean wrote:
>Hi Dan,
>
>Actually, I'm not a PhD student, I'm an undergrad (senior). And, yes, I
>have used crimp tools for other types of connectors before.
>
>So, are you just going to make remarks or ar you going to tell me how to
>do it? :-)
>

Hey, "I" don't know - they never taught me that stuff in school :):).

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2001\02\22@141544 by John Walker
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Sean,

        Most of the BNC crimp connectors I have used contained only three
pieces. The "Teflon" piece
you speak of is most likely an additional insulator between the center
conductor and the body of the
connector. So to use, after you strip the wire, slide the hollow silver
cylinder on the cable, slide the
"Teflon" part onto the conductor wire, crimp the small brass point onto the
conductor wire, slide
the connector body onto/into the cable. Finally, slide the cylinder tight
against the connector body,
and crimp the living daylights out of it. VIOLA!!!

JJW

At 10:50 AM 2/22/01 -0800, you wrote:
{Quote hidden}

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2001\02\22@145058 by Thomas McGahee

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Sean,
This isn't EXACTLY what you asked about, but it should
be close enough to give you some help.

http://www.milestek.com/products1.htm

Choose "Technical Info" at the very top of the page.
From "Instructions/Product Support", select
"BNC Plug Installation" from the list.

There are several other tool categories that you may
also find useful to investigate, such as the pin crimper
that is used to crimp on the tiny end pin. Your
tool may not be identical, but the general instructions
should still apply.

Fr. Tom McGahee

{Original Message removed}

2001\02\22@154517 by Oliver Broad

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Been there, and frankly it sucks when you don't get instructions. Trouble is
I use 50 ohm and RG58 so not exactly the same.

The 50 ohm type always have an insulator that surrounds the pin and extends
to the front. In clamp type connectors it's usually loose but in crimp ones
it's captive. By elimination the only place I can see it going is between
the trimmed end of the coax and the pin but even that I'm not convinced of.

Since you imply it's a small quantity if you have a choice I would advise
using the clamp type that comes with a longish sealing gasket, cylindrical
about 5mm or 1/5 inch long. Don't know the make. There's another type with a
different clamp and a very thin gasket but we won't use them.

I guess it's a foregone conclusion you're stuck with crimp type? Can you get
anything out of the supplier?

Oliver
{Original Message removed}

2001\02\22@154524 by Barry King

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Sean,

All the ones I have used come with *instructions* that tell the strip
lengths of the jacket, braid, dielectric, and center conductor and
the little exploded drawing of how to put it together.

The strip lengths really matter to get it to work right and not short
out.

But in general:
1)You strip the jacket and braid the same length, leaving center
conductor and insulator longer.
2)Then the strip the insulator, leaving it longer than the jacket,
but leaving bare center conductor.  You thread the insulator disc
onto the center conductor, then crimp the pin on.
3)Drop the "tube" (ferrule) over the cable.
4)Press the dressed cable into the body, the neck of the connector
jams in between the dielectric and the braid
5) crimp the furrule over the jacket in the area covering the neck of
the connector, so it can't pull out.

But: Connector designs and dims. vary a lot.  So: Do you have the
docs?  If not, can you tell the manufacturer / model # for a www
search?

Regards,

Barry.
------------
Barry King
NRG Systems "Measuring the Wind's Energy"
http://www.nrgsystems.com
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2001\02\22@230530 by Jess Hancock

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Radio Shack claims to have answers - give them an exam - occassionally you
find someone who knows something.  I don't recommend their connectors
though.

Jess

{Original Message removed}

2001\02\23@192027 by Brian Kraut

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I have always assumed that the teflon piece was a heat insulator when
soldering.  When you solder the center pin on RG-59 with foam dielactric the
heat from the pin melts the dielectric and you wind up with a 1/8" gap
between the back of the pin and the start of the dielectric.

Sean Breheny wrote:

{Quote hidden}

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