wrote:

On Thu, 15 Apr 2004 11:52:45 -0400, William Mutch
wrote:

In article ,
says...


I've run my Sat 800 (second series) for the last year on a car
battery. The supply voltage as listed in the manual is 9 volts, but
cast in plastic above the supply input jack is "9-15 volts". The radio
is very happy with even a fully charged battery at 13.8 v and will last
for *weeks* of my teenager listening to loud rock music between charges.

--------------

9-15 volts; interesting!

I bought one of the first available S800s from Sharper Image (Still
works like a champ with a very quiet 400' loop, everyday). The
plastic on mine, by the input, reads DC 9V.

I do run mine on a garden tractor/snowmobile battery but use an RS
DC-DC converter to get 9V @900ma output. In addition I keep a 50w
solar panel connected to the battery. Maintenance on the whole deal
is to add a little distilled water to the battery every couple years
and occasionally soap/rinse spray the solar panel on the roof.

Was tempted at first to chance running the receiver straight off the
12V too, but opted to be gentle on the components. Any comment out
there on detrimental effects of higher voltage use? Or, what's best
for the radio.

The only componant(s) that would experience the higher voltage would be
the main voltage regulator which is apparently designed to handle an
input voltage of up to 15-V. The '800' actually has an internal DC to DC
converter which steps up the nominal 9-V input voltage to 15-V for
certain circuits that need a higher voltage. There must be something in
the owner's manual regarding the maximum input voltage.

Now you have me wondering if my Drake-SW8, which was the prototype for
the '800', could be run on 12-V instead of 9-V. I'll have to check the
manual and schematic.


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