On Jun 24, 3:45?pm, "Pat Cook" wrote:

The logging PC will have it's own homebrew DC-DC
boost converter.

Out of curiosity
why not just
simply use A LAPTOP? You can always replace the
batteries in a laptop.

I think they are using a laptop, because I don't know any desktops
that run on 12 volts DC (though there are probably some). It sounds to
me like what they did was to use a laptop with a charging cord meant
to go into an auto accessory power socket. That way, the primary power
comes from the 12 volt power system they need for the rig, and the
laptop's internal battery is used for backup in case there is some
sort of power interruption.

FD lasts more than 24 hours, and I don't know any laptops whose
batteries will run that long. Using external power means no
interruptions.

73 de Jim, N2EY

just got back from FD