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PL-259 to RG-8X

Looking for proper procedure to solder PL-259 connector to RG-8X coax

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Here are several ways to install Amphenol's UHF connectors.
Amphenol is the king in connectors. A lot of the stuff on the market is junk
Amphenol wrote the book on connectors. ASK ANY HAM.

Posted on Mar 16, 2009

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Here is the instrucktino in PDF format:

Here is a website with instructions and illustrations:

These will help you out tremendously.

Dean Pitts
Rollin CBs
Mt. Vernon, TX

Posted on May 22, 2008


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I have a uniden bearcat 880 CB radio and just hooked it up to a K40 antenna with a 9' mini 8 coax and for some reason my swr is pretty much 3 and it passes on the rf output test but fails antenna test

Failing either test is odd. Is mini 8 coax RG 8x? I assume it is, so your readings do not make sense. My first suggestion is to test with another piece of coax. If it tests fine, check your connectors! If it is still bad, you may have a rare piece of bad coax. It happens, just not often. Please post your results. Jack

Mar 20, 2017 | Uniden Radio Communications

1 Answer

Wilson roof mount coax is broken at radio connector end

I'm going to assume you've got a PL-259 connector on the end of the coax cable - they look like this:


They are designed to screw onto the radio's RF / Antenna jack. The end shown is standard, the other end - that the cable enters, requires an insert that matches the coaxial cable outside diameter.

There are two versions of the connector; solder-less and soldered. The best connection is provided by the soldered type. It is superior both electrically and mechanically to to the solder-less version. If you lack soldering skills, patience and / or the tools and supplies to solder the connector, the solder-less version will be the way to go.

There are two types of solder-less types, a crimp and non-crimp type. They look like these:

The "Non-crimp" solderless PL-259 from Radio Shack - about $6.

A crimp type PL-259 connector - $2 and up at various radio & electronics stores.

Since this end of the antenna is at the radio and presumable protected from the elements, it may prove to work very well for you. Each of these connectors requires knowing the type cable (RG-58 and RG-8 are very popular types - but there are many other 50 ohm coax cables) or outside diameter and selecting the one that fits correctly, along with a crimping tool (and dies) for this particular connector size. You may get by with a standard pair of pliers, but the connection is not as good as would be obtained with the crimp tool. Generally, you would provide a crimp around the ferrule at the cable end for the braided conductor and another at the very tip of the connector for center conductor.

Each connector will include very specific cable preparation steps for the removal of insulating jacket, braid and dielectric material to provide proper fit of the connector to the cable. If it were a "standard", I would have included it.

Check this link for Youtube video the show how to install the various types of PL-259 connectors on cables.

I hope this helps & good luck!

Jun 05, 2012 | Radio Communications

1 Answer

On the ICOM M604 will not receive the weather channels, will receive other close radio's.


This is almost ALWAYS caused by a problem (a short OR an open) in the coax cable from the VHF radio to the antenna. An easy way to check is to JUST insert the PL-259 connector into the socket of the radio, making sure that ONLY the center pin is making contact with the socket. If the weather channels come in clearly, then it's usually an easy fix. Simply check the connections at each end of the coax, looking for a poor center pin solder connection or perhaps a bit of the ground braid is shorting out the center lead. A magnifying glass is a great tool to spot problems.

If the coax proves NOT to be the problem, then the fault is likely to be in the radio itself and is probably a bad solder connection where the antenna chassis mount attaches to the PC board.

Hope this is helpful.
Good Luck!

Jan 09, 2011 | ICOM Informatique Icom M604 Vhf Marine...

1 Answer

I have a red ANT light i can move my ANT coax on the back of my radio and it cuts the light on and off. any idea what this means

This is telling me that there is possibly a problem within the PL 259 connector ................cut off the connector and redo making sure there is no shorts. THis ....THE SHORT IS SHOWN BY THE ANT WARNIG LIGHT COMMING ON...........NO LIGHT......NOT SHORTED OR OPEN CABLE / CONNECTOR.

Sep 20, 2010 | Cobra 29 LTD CB Radio

1 Answer

I have a basic 40-channel cobra cb radio and 2 four foot firestik whips mounted in the stake holes of my truck. I have dual 18 ft. coax connecting the two which is ran through 2 small holes near my door,...

You should check the coax cables for damage . ALso, did you attach the PL-259 connectors yourself to the coax cables? They can be tricky. You need to check for loose or bad connections between coax cable and connector.
Of course it could be the radio itself went bad on you. Check this with a friend; when you connect his radio to your antenna system, does everything work then? Hope this helps.

Aug 23, 2010 | Radio Communications

1 Answer

Which connector to get for 1/4" Heliax LDF 150A cable?

get a PL 259, it is the male mate to the female so 239

Dec 28, 2008 | Uniden BCD396T Handheld Scanner

1 Answer

Coax ends

Hello kewball,

You can buy the PL-259 connector at radio shack (Here is a link to the instruction on how to put a PL-259 connector back on):

I hope this helps

Thank you,


Nov 04, 2008 | Cobra 19 DX IV CB Radio

1 Answer

Attachment of PL-259 to RG-8X


The basic procedure has not changed. An illustrated "how to" guide is available here.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

May 19, 2008 | Radio Communications

6 Answers

Saturn workman b-100


I read through the specifications of this antenna and you were right in posting "no ground plane, no tune". Still, there are only three (3) possible reasons why the SWR would be high:
1. Cable/connector - loose, cold solder or improperly terminated;
2. Antenna - tuning and/or ground plane; and
3. Radio has been highly modified or defect in final stage.

Corrective procedures would call for:
a. verify that the coaxial cable is properly connected to the PL-259 connectors. You may need to use a continuity tester (or a DVM) to do so. Pls pay particular attention to the braided shield/grounding, they should be real tight/soldered good to the casing of the connector. Of course the cable should be 50ohms RG8 or 58 with thick shielding.
b. as stated the antenna doesn't need to be tuned then there's nothing that can be done since there is no provision for such, however, even if the specs says no ground plane needed, there is something you can try. Install a ground plane. this could be done by attaching 2 lengths of big gauge ordinary wire to both sides of the metal bracket of the antenna. They have to be 8' 7" ~ 9' long. It may help you further to install a grounding strap again from the metal bracket to any grounded metal portions of your house such as the plumbing.
c. radio problem would be unlikely if it is still stock.

Hope that this be of some help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Feb 06, 2008 | Cobra 148 GTL 120-Channels Base CB Radio

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