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Author Topic:   New VHF Won't Transmit
Mobjack posted 07-17-2006 09:51 AM ET (US)   Profile for Mobjack   Send Email to Mobjack  
Hello to all,

Purchased a brand new ICOM VHF transceiver at West Marine a couple of weeks ago, finally got around to installing it this weekend. I am no marine electrician, I am no kind of electrician, but my montauk had an older radio on it that no longer functioned, I traced everything back to the source and hooked the new one up just like the old one. Seemed to work, I tried a couple of radio checks from my house that night, to no avail, as I live well up a creek out of clear reception of anything. I did notice that the Push to Talk was a little sticky, like I would have to push it extra hard to get it to register a TX on the screen.

So yesterday I made it out on the water and tried to test my new radio, and the thing will not transmit at all. I am getting good reception on all channels and I can pick up the weather, so I know my antenna is working, but when I hit the PTT, i get nothing. No tx on the screen, no click, nada. This radio is two weeks old. Is it a dud? Did I wire something wrong? Any thoughts would be appreciated.

Chuck Tribolet posted 07-17-2006 09:59 AM ET (US)     Profile for Chuck Tribolet  Send Email to Chuck Tribolet     
The only wiring error I think you could have made is to use
wire that was way too thin so when the load goes up when you
hit transmit, the voltage goes down.

But if there's no TX on the screen when you push PTT, and the
manual says there should be, then the radio (mike actually)
is busted. The good news is that West has a really good
return policy.


jimh posted 07-17-2006 01:07 PM ET (US)     Profile for jimh  Send Email to jimh     
Seek help from the retailer that sold you the device.
bsmotril posted 07-17-2006 05:38 PM ET (US)     Profile for bsmotril  Send Email to bsmotril     
A bat antenna connection, or defective antenna, may still receive fine and not allow the radio to put out a good signal on transmit. So don't assume the antenna is good because the radio receives. A simple test is to get a PL259 coax connector and wire in a light bulb socket to the connector. Put a 40 watt appliance light bulf in the socket, plug it into your radio, and pust the talk button. The bulb should light up to half brightness level. Even better, Shakespere sells a marine VHF watt meter/SWR meter. That will also tell you if the problem is with the transmitter, or the antenna. But it is a bit more expensive than the lightbulb.
Also, as others said, look at the power wire and connections. If the old radio had the same problem too, that would be the first thing I would check. If that circuit cannot deliver about 2-3 amps to the radio, it won't transmit
jimh posted 07-21-2006 07:56 AM ET (US)     Profile for jimh  Send Email to jimh     
Transmit is inhibited on RECEIVE-ONLY channels.

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