Join Date: Aug 2006
Location: Arlington, VA
Thanked 13 Times in 11 Posts
Rep Power: 11
Blinking lights are usually a sign of stray RF alright, but not necessarily due to significant antenna/ground system problems. It can also be due to wiring problems, failure to use adequate RF blocking devices (ferrites, chokes, etc.), and resonant circuits. It can be caused by failure to adequately separate RF ground from the boat's DC ground. And by faulty connectors, or bad coax. It can be caused by standing waves on the coax, control, or DC power cables, especially if they are led close to other boat wiring.
I think in your stead I'd take the next 3 weeks to carefully go over your entire setup, checking the integrity of connections, correct wiring, installing ferrite chokes, etc., and also listening a lot. And, if you haven't already done so, get hold of a good power/SWR meter and put it in-line, near the transmitter.
About to take Max for a walk and to check my boat....