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From an excellent post in the forum by KA3SGM See Profile, these tips on how to install connectors on 9913 Flex Coax cable:

I included some examples of Thread-on and Crimp Type N connectors, with a ruler to reference the proper strip lengths.

Old Fashioned Twist-On PL259(Solder braid and Center)

Same Idea as the PL-259 Here, Only an N connector, the center conductor gets shortened as the Gold Pin makes up the connector.

Crimp PL-259, Finished with Hot Melt Glue type Heat Shrink Tubing

I usually stick with the crimp type PL-259 (crimp body, solder pin), then follow it up with a good length of heavy duty heat shrink (the type that has the hot melt glue inside) to seal up the back end of the connector.

To seal the entire connection, a wrap of silicone (mocap) tape, then coax seal followed by a good outer wrap of electrical tape (Scotch 88).

PL-259's with the Teflon Dielectric are recommended; the heat from soldering the center pin tends to start to melt the non-Teflon type connectors.

I have found that the LMR400 type coax is easier to work with, permits a much sharper bend radius, has better loss characteristics, and doesn't have the hollow dielectric like 9913 which means it doesn't include the possibility of accumulating water inside the cable, thus ruining it.

The following procedure shows installation of an N-Connector with a no-solder(auto-seizing)pin, onto the LMR400 coax:

The fancy stripping tool is good, but it is just as easy to strip the cable with a good utility knife.

The strip dimensions for the PL-259 are slightly different, so you will need about 5/8ths" bare center conductor, because an N connector has a full length pin, but the PL-259 requires the center conductor to reach the end of the center pin to be able to solder it.

The chamfering tool can be substituted by a small file, just to de-burr the center conductor tip so it can easily slide through the center pin.

The crimp tool with the .429 crimping die works with RG-8, 9913, and LMR-400 alike and is a good investment for a ham to make, unless you can find a friend to borrow their crimp tool.

This depicts an N-connector install on LMR400, but this would be the same as installing a PL-259 onto any RG-8, 9913, 400,(.405" diameter) type cable:

For UHF and up, the LMR 600(Bottom) has alot less loss than the LMR400(Top)

Expand got feedback?

by KeysCapt See Profile
last modified: 2008-08-07 06:32:45