In article ,
Gary Schafer wrote:

Come on guys, get back to the proper way to do the job and the
simplest. The 24 to 12 volt converter.

Resistor dividers will draw more power than the radio. A zener has to
be very large for the job at hand. Again it will consume as much power
as the radio.

regards
Gary

As I posted very early on, one could use a 24-36Vdc/12Vdc Switching
Converter of an appropriate current rating, to charge a small 12Vdc
Group 12, AGM, or Gellcell battery, and then run a 12Vdc buss for all
the loads aboard that require that range of power. This is entirely
consistant with The Fishing Vessel Safety Act, and SOLAS Requirments
for Reserve Power for Required Communications Systems. A lot of the
older Coastal Freighters af less than 1600 Tons that trade in the
gulf of Mexico, and in the North Pacific and Gulf of Alaska, were
32Vdc powered vessels, and the SOLAS requirments were meet using this
type of system.


Bruce in alaska
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add a 2 before @