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 Catalina/Capri 25/250 Sailor's Forums
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 VHF radio won't transmit
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Davy J
Master Marine Consultant

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USA
1511 Posts

Initially Posted - 03/09/2012 :  08:58:18  Show Profile
I was washing the boat the other day and got a little careless with the deck brush and wound up breaking the vhf wire at the deck connector.

So I picked up a new PL-259 connector, cut the wire an inch or two from the previous end and installed the fitting. Checked the radio, receiving weather broadcasts, and can hear other people, but I am not able to transmit. I even tried to hear my transmission with my handheld VHF 50' from the boat but get nothing. Any ideas?

Davy J


2005 Gemini 105Mc
PO 1987 C25 #5509 SR/SK
Tampa Bay

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Sloop Smitten
Master Marine Consultant

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USA
1181 Posts

Response Posted - 03/09/2012 :  09:32:01  Show Profile
I would expect you shorted the shield to the core wire when you assembled the new connector. That can be very hard to troubleshoot since some of the antenna's show up as almost dead shorts when you measure across them. I would try re-assembling the connector. Radios can pick up signals even with a shorted antenna or cable. (I know). Especially weather broadcasts. It is transmitting that will have the most negative impact.

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Voyager
Master Marine Consultant

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USA
5232 Posts

Response Posted - 03/09/2012 :  23:22:44  Show Profile
I think Joe's got a good point there. Other problems could include:
1. Is the center conductor making a good connection with the receptacle inside the antenna bottom? - corrosion or grunge can prevent the shiny copper wire in the male connector making 100% contact with the shiny spring-loaded contacts inside the female receptacle. A bit of sandpaper on the wire will shine it up and a thin pointy file will clean up the receptacle.
2. One small piece of the shield cable can be shorting to the center conductor behind the connector. This will short out the cable and make transmissions impossible.
3. Could the cable have been pulled or damaged on the other end? If the brush hit the cable and it pulled out the far end, you could have a problem. Use your ohmmeter to check continuity of the cable.
4. Sometimes the foil jacket can short when crimped inside the connector. Pull it apart and see to it there is no foil touching the center conductor.
5. Sometimes the connector end itself goes bad. One more thing to check.
Good luck Davy J

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