[Mohammad Bayegan]

My VHF antenna broke off.

I had my rigger to replace it. Now my VHF radio volume is very low, and I don't think it transmit, no one reply to my radio checks.

Appreciate any input.

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[John Van Den Hengel]

Suggest you contact Coast Guard at 83A and request a radio check. They generally will give you a # between 1 and 5....( Five 5 ,) Bring excellent.

J

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[Bricolanto]

Assuming the rigger did it right then I would check if antenna is on top of mast then too much movement of the antenna cable could chafe it through and it is shorting out on the mast?  If you have a connection at deck level you could check for continuity with the mast.

Brian

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[Mark J Wilme]

Did you put a SWR meter on the coax?  Could just be a bad connection including at the mast/deck interface

On Mon, Oct 28, 2024 at 12:56 PM Mohammad Bayegan <moh...@msn.com> wrote:

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[DAVID FLETCHER]

Unscrew the ring on the pl219 connector pull the two pieces slightly apart 

If the radio is louder and transmits better you have a short between the shield and the coax. 

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On Oct 28, 2024, at 1:01 PM, John Van Den Hengel <john...@gmail.com> wrote:



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[Alvis]

Mark's suggestion is the best if you have access to an SWR meter.

You can check for a short with an ordinary multimeter at the connector at the radio end of the cable, but an open circuit can't be diagnosed with a multimeter as an antenna normally reads open circuit.

What broke the antenna off the masthead? if it was and impact (bird or other object) it may have damaged the cable/connector at the mast head and the rigger couldn't tell by looking at it. eg the centre conductor may have broken from the centre pin of the plug.

When you send someone up the mast to check, get them to disconnect the connector and short the centre pin to shield while you con firm the short with your multimeter at the radio end of the cable.

If you have an emergency antenna you could try that on the radio first and prove the radio is working OK, then send the emergency antenna up the mast with the crew/rigger/technician and connect it and see that it works up there to prove the cable is OK.

If all that works, the new antenna is faulty.

Good luck.

[Mark J Wilme]

going back to my old CB radio days there -we always had an SWR meter in line.

I was in the UK at that time and we would amp the signal and get atmospheric bounce and talk to people on the other side of the world.  Details are a bit fuzzy now - I think we called is skipping or something and only occurred under some very specific conditions.

Fun times

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