"Peter Bennett" wrote in message
news.com...
On Tue, 16 Jan 2007 00:53:10 GMT, wrote:

Actually a 60 watt load is a lot for a non switching regulator to do.
You don't want a switching type on a boat as it interferers with the
radios.

I think your best bet is :
http://www.nteinc.com/specs/900to999/pdf/nte933.pdf
I have used this in airplanes with good luck before.

NOTE! USE a BIG heat sink!! it will get hot. If it gets too hot the
device
will auto shutdown.

Captain Joe

The NTE933 is not a good choice for this application - the minimum
input/output differential (AKA dropout voltage) is 2.6 volts - on a
car or boat 12 volt system, this means that the NTE 993 regulator will
only be working as a voltage dropper, and not as a regulator.

I think that the only solution for the OP is a switching regulator
that can both buck and boost the input voltage.


A while back there was some discussion regarding the decrease in life of LED
lights if you ran them on the charging voltage of 14 volts vs a lower
voltage. Voltage reduction solutions were discussed. The potential problem
with the lack of sufficient voltage differential to properly activate a
voltage regulator was discussed and a couple of folks pointed out there are
low-dropout regulators that will work with a differential of only 0.4 volts.
Don't know about the power handling ability of these though.