JIMMIE wrote:

On Feb 10, 11:38 am, Jeff Liebermann wrote:
On Fri, 10 Feb 2012 06:17:03 -0800 (PST), JIMMIE

wrote:
Jeff, I installed TVRO systems for several years and used a lot of F
connectors. Suprisingly the ones I found that worked best were the
ultra cheap ones that only took a pair of pliers to fasten These were
the ones with the separate crimp rings. Used with some good quality
heat shrink tubing this eliminated most of the problems you mention. I
dont know why these connectors went away, my only guess is that
someone wasn't making enough money on them.

Jimmie

Yech...

Please try this test. Insert such a crimp type F connector and cable
into some useless piece of equipment with a type F jack. Pull on the
cable hard. In my experience, it doesn't take much to make the cable
and connector part ways. Repeat with a screw on connector. Now,
repeat the experiment using a properly assembled compression type F
connector and cable. It takes considerably more brute force to break
the connection. I think the official minimum pull test is 55 lbs, but
I'm too lazy to Google for it now.

Hiding the workmanship under shrink tube is not very functional. It
will have little effect on the pull test.

Most of the cable leakage problems I've seen (and found) were due to
crimp type F connectors coming apart or badly crimped. That includes
both the hex shaped crimp, and ones held together with a crimped ring.

Bad:
http://www.fconnector.org/wp-content/uploads/2011/12/F-Connector2.jpg

Worse:
http://www.showmecables.com/images/catalog/product/F-connector-RG59.j...

Good:
http://images.lowes.com/product/converted/783250/783250926510lg.jpg

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

You are correct that the problem is in the hex crimp and part of this
is because they started making the crimp made on to the connector. The
other part is that you have to have a special tool to crimp them. All
the pictures that you showed are require a special crimp tool. If
these tools are worn or dont fit the particular plug/ cable
combination you will get a bad crimp. The old style that is probably
40 years old now that you could crimp the little ring with a pair of
pliers worked the best. Unfortunately you can no longer get them,
well I do have a few.


A 'special tool' that only cost about $20 and would do thousands of
crimps before it was worn out. I've bought them new, on sale for $8
US. You admitted to using pliers on the cheap crap, and you certainly
can't do that with a hex crimp.


--
You can't have a sense of humor, if you have no sense.