In article ,
"craigm" wrote:

"starman" wrote in message
...
Someone said the '800' has writing on the rear of
the case that indicates it can handle up to 15-V input. I have a
JPG copy of the '800' schematic so I'll check it out too.



My Sat 800 says 9V on the back. The manual says 9V also.

When you look at the schematic you will find the input DC is routed
several places and not all of them lead to a regulator.

My position would be to only use a 9 volt supply. Why risk damaging
the radio by providing more than it can use?

Linear switching regulators are lossy and will dissipate more heat the
higher the input voltage relative to the output voltage. It might get to
hot and fail after a while. You only need to be slightly higher than the
minimum drop across the regulator plus the output voltage. There is no
advantage being any higher.

--
Telamon
Ventura, California