Re: [IRCA] DC Power for DX rigs

[Rick Kunath <k9ao@xxxxxxxxxxx>]

Tom Jasinski wrote:

 >>
 > I also used batteries to power my R8A and found out that this set 
will cease
 > to work around 11V+/- or so.  As the battery voltage drops the R8A audio
 > starts to get distorted and eventually the radio is unusable.


With a 100 Ampere-hour AGM deep-cycle battery, and assuming a current 
draw of 5A, you wouldn't drop below 12V until about 15 hours of use, 
you'd drop to 11V after 20 hours.

It looks like the drake only draws 2A on DC, so the run time would be 
extended (perhaps as high as 40 Hours, but that's an interpolated 
guesstimate), though you'd likely have a few accessories going at the 
same time.

The discharge vs. voltage curves for various battery technologies are 
really quite different. Using the right battery for the job (and making 
sure you really have what the salesman says you have, battery wise) can 
make all the difference in the world.

Rick Kunath

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