I have a 2006 318 with analog tv. I purchased one of the new analog to digital converters with the $40 gov't coupon and hooked it up to the Sharp TV standard equipment on the boat. While I was able to hook it up, and get the TV to respond to the converter box, the TV says "no signal". I'm thinking it may be that the TV antenna works only off the DC circuit, while the converter box works off AC only. But otherwise, I can't understand why it does not work. Has anyone had the experience of changing their installed analog TV so it can recieve digial signals using the antenna that comes with the Four Winns?

The antenna up on the arch is powered. There's an amp for it built into the wall panel. It's that plate that has connections for coax and antenna (at least that's how it's setup on our 348). Built into it is the power supply for the antenna. You'd have to put your converter box between the TV and that amp. I've not bothered getting a converter. Mainly because on-water TV reception is usually pretty terrible on the Chesapeake. I did add a 2nd TV that has HD capability and it gets pretty much the same signals. If I did add a converter I'd definitely get one that ran off 12vdc instead of requiring AC.

And to your question about 'no signal', is that a message from the TV or from the converter box? Obviously if the TV isn't getting a signal from the box you have a different problem than if the box isn't getting a signal from the antenna. So which one is making the no signal message?

The "no signal" indicator is coming from the TV. The signal indicator coming from the converter box shows a "weak" signal. Not sure what this means.

Now if I can just get my water heater to work. It may have a reset button that got tripped from being turned on with no water from previous owner, but it's not readily accessible to check the front panel.