On Fri, 06 Apr 2007 03:27:04 GMT, "Jerry Martes"
wrote:
snip
Belden, Alpha and Carol are all good. As important as the cable are
the connectors. The compression type are the way to go, IMO. Invest
in a good QS stripper and a compression tool. Don't bother with crimp
tools and don't even think about twist-on.

HTH,

Paul


Hi Paul

What is the problem with "twist-ons"? I dont question your judgement,
but I have found them to be good for my 2 meter application.

Now I am considering doing some work at 2 GHz. This is a good time for me
to learn about cable and F connectors.

Thanks
Jerry

Two reasons I don't like twist-ons. First, I don't find them to make
that great of a mechanical connection and can therefore be pulled off
the cable fairly easily.

Second, and I admit I don't have network analyzer plots to back this
up or anything, I've always found them to make a mess of the shields
when you twist them. That could lead to more of an impedance bump at
the connector than with other types. Probably not an issue at 2
meters, but more important as the frequency goes up.

Paul

In message , Paul Franklin
writes
On Fri, 06 Apr 2007 03:27:04 GMT, "Jerry Martes"
wrote:
snip
Belden, Alpha and Carol are all good. As important as the cable are
the connectors. The compression type are the way to go, IMO. Invest
in a good QS stripper and a compression tool. Don't bother with crimp
tools and don't even think about twist-on.

HTH,

Paul


Hi Paul

What is the problem with "twist-ons"? I dont question your judgement,
but I have found them to be good for my 2 meter application.

Now I am considering doing some work at 2 GHz. This is a good time for me
to learn about cable and F connectors.

Thanks
Jerry

Two reasons I don't like twist-ons. First, I don't find them to make
that great of a mechanical connection and can therefore be pulled off
the cable fairly easily.


If you can pull them off, you are probably not putting them on
correctly.
(Tip: Ignore instructions, and use cunning.)

Second, and I admit I don't have network analyzer plots to back this
up or anything, I've always found them to make a mess of the shields
when you twist them. That could lead to more of an impedance bump at
the connector than with other types. Probably not an issue at 2
meters, but more important as the frequency goes up.

While the connector thread will crush the outer somewhat (causing a very
short piece of low Zo), it's unlikely to be a problem in most
applications, even at 2GHz.

Ian.
--

In article ,
Paul Franklin wrote:
On Fri, 06 Apr 2007 03:27:04 GMT, "Jerry Martes"
wrote:
snip
Belden, Alpha and Carol are all good. As important as the cable are
the connectors. The compression type are the way to go, IMO. Invest
in a good QS stripper and a compression tool. Don't bother with crimp
tools and don't even think about twist-on.



What's the diff between a compression tool and a crimp tool?


OT: I inherited break/fix responsibility (billable by the hour) on a
business thinwire lan that was installed by a TV cable guy. He used
twist-ons and no crimp rings. That site paid my rent for a couple
years, until I eventually replaced all the connectors with proper
ends.

For that reason, I've always looked fondly on twist-ons, in a bizzare
way.

--
a d y k e s @ p a n i x . c o m
Don't blame me. I voted for Gore. A Proud signature since 2001

On 6 Apr 2007 08:29:32 -0400, (Al Dykes) wrote:

In article ,
Paul Franklin wrote:
On Fri, 06 Apr 2007 03:27:04 GMT, "Jerry Martes"
wrote:
snip
Belden, Alpha and Carol are all good. As important as the cable are
the connectors. The compression type are the way to go, IMO. Invest
in a good QS stripper and a compression tool. Don't bother with crimp
tools and don't even think about twist-on.



What's the diff between a compression tool and a crimp tool?


OT: I inherited break/fix responsibility (billable by the hour) on a
business thinwire lan that was installed by a TV cable guy. He used
twist-ons and no crimp rings. That site paid my rent for a couple
years, until I eventually replaced all the connectors with proper
ends.

For that reason, I've always looked fondly on twist-ons, in a bizzare
way.

The compression fitting have a captive sleeve on the cable end of the
fitting. You strip the cable more or less as usual, slide it up
through the connector as you would with a crimp type. But then the
compression tool presses the sleeve up into the body of the connector.
The inside is tapered, so when the sleeve is pressed in, it compresses
against the cable, locking it tightly into place.

Here's a pictu

http://www.cablestogo.com/product.as...=411&sku=41077

They are also available with seals for water resistant outdoor use.
(In fact, the picture is of a connector with seals.)

Here's what the tool looks like:

http://www.cablestogo.com/product.as...1403&sku=38011

Try 'em, you'll like 'em!

Paul

In article ,
Paul Franklin wrote:
On 6 Apr 2007 08:29:32 -0400, (Al Dykes) wrote:

In article ,
Paul Franklin wrote:
On Fri, 06 Apr 2007 03:27:04 GMT, "Jerry Martes"
wrote:
snip
Belden, Alpha and Carol are all good. As important as the cable are
the connectors. The compression type are the way to go, IMO. Invest
in a good QS stripper and a compression tool. Don't bother with crimp
tools and don't even think about twist-on.



What's the diff between a compression tool and a crimp tool?


OT: I inherited break/fix responsibility (billable by the hour) on a
business thinwire lan that was installed by a TV cable guy. He used
twist-ons and no crimp rings. That site paid my rent for a couple
years, until I eventually replaced all the connectors with proper
ends.

For that reason, I've always looked fondly on twist-ons, in a bizzare
way.

The compression fitting have a captive sleeve on the cable end of the
fitting. You strip the cable more or less as usual, slide it up
through the connector as you would with a crimp type. But then the
compression tool presses the sleeve up into the body of the connector.
The inside is tapered, so when the sleeve is pressed in, it compresses
against the cable, locking it tightly into place.

Here's a pictu

http://www.cablestogo.com/product.as...=411&sku=41077

They are also available with seals for water resistant outdoor use.
(In fact, the picture is of a connector with seals.)

Here's what the tool looks like:

http://www.cablestogo.com/product.as...1403&sku=38011

Try 'em, you'll like 'em!

Paul



OK. It's a large, well engineered crimp tool and fitting.

I actually have tools, some cable, and a bag of ends that fit that
description. I just considered them standard tools and parts for
serious work. They came to me by accident. I was the "customer" for a
a pre-ethernet LAN built on CATV plant that spanned a 40 floor
building.
--
a d y k e s @ p a n i x . c o m
Don't blame me. I voted for Gore. A Proud signature since 2001