Not sure if Ed is thinking of one of the Power Gates from West Mountain 
Radio, or something similar.

I guess you have a distance problem between battery location and radio 
location.  If there was any way around it, I would prefer to run off 
the batteries and forget the inverter.    Some of them are RFI machines.

Also there is a device which I think is generically known as a "battery 
booster".    Even as the battery voltage drops, it keeps the output at 
13.8 vdc.   Of course MFJ makes one, but there are others out there.   I 
think in the $125 - $150 range.

Happy sailing, Steve KW3A

On 10/27/2014 12:18 PM, Ed Malmgren wrote:
> G M Ron, What I did when I had a cabin cruiser and added another battery was
> to get a device and I can't remember what it is called but it has two diodes
> back to back leading to each set of bats.  The alternator feeds the center
> between the diodes and then which set of bats are low takes the charge but I
> don't think I would short both of sets of bats together.  That way you never
> get your starter bat run down and have to paddle to shore hi hi.  Thad
> device has cooling fins on it to keep cool.  I use the deep cycle bats in my
> motorhome to run my 590 but I do have solar panels on the roof.  Good luck
> Ron.  73
>
>
>
> ED K7UC
> -----Original Message-----
> From: Dr. Ronald E. Milliman
> Sent: Monday, October 27, 2014 9:54 AM
> To: [log in to unmask]
> Subject: Operating maritime mobile
>
> Howard's hamming in the park brings to my mind a fun hamming event I want to
> undergo here, and maybe some of you will have a suggestion for a source of
> power that I can use to make it happen. I want to take my TS-590 out in my
> 24 foot deck boat out on Lake Barkley here where my lake house is and
> operate maritime mobile from my boat. The only part that I am uncertain
> about is my source of power. I have two deepcycle batteries in the boat in
> addition to the cranking battery for the engine. I have considered
> connecting a 12-volt DC to 120-volt AC inverter to the deepcycle batteries,
> and then, running a jumper cable across from the cranking battery to the
> deepcycle batteries. I believe if I keep the engine running, the alternator
> will keep all of the batteries charged up, but I don't know if the
> alternator puts out that much to handle it, and I don't know if the inverter
> puts out enough to power the TS-590. Of course, I can control the power of
> the 590 from 100 down to 5 watts. I have a 4-stroke Suzuki engine which
> idles very quietly; so, engine noise would not be a problem. I don't know if
> the electrical system of the boat would generate any excessive noise in the
> TS-590 receiver or not.
>
>
>
> The antenna would not be much of a problem since I can stick a length of
> pipe in the bottom of the lake and put a vertical on it, using the lake as
> my counterpoise.
>
>
>
> Now, tell me if you think this if feasible or if it is the craziest, most
> ridiculous idea you have ever heard! <lol>
>
>
>
> Ron, K8HSY
>
>
>
> Dr. Ronald E. Milliman
>
> Retired Professor of Marketing
>
>
>
> President: Millitronics, Inc. (millitronics.biz)
>
>
>