Join Date: Jul 2008
Location: Jacksonville, Fl
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Here's what I'd try and do:
Talk to a boater friend and see if you can hook your new radio to their antenna. If it works normally, then you're sure your antenna/coax have a problem. I know that sounds dumb, but never assume a brand new piece of electronics equipment is good straight out of the box. Since I spent 35 years working in that business, I can tell you we had more DOA circuit boards, etc., than you can imagine in your worst nightmare.
Also, most electronics devices, if they're going to fail, fail during the first 5 or 6 hours of use.
If the radio works on another boat with another antenna, you have your problem isolated to your own antenna or coax.
To isolate it further, you need to run a temporary coax from your antenna to your radio. If this is a masthead rig, I know it's a pain, but your options are a very long coax or pull the antenna down. At least you'll have separated the problem.
Long experience tells me to suspect the antenna, but you don't mention whether it was working before you changed radios, or why you changed radios. If your original radio blew up, I'd definitely suspect the antenna.
Last thing: until you've absolutely isolated the problem, don't transmit. Not even for a second, or the radio will go up in a small cloud of smoke. The transistors in the 'final' amp don't like seeing a short on them.