Howard W3CQH wrote:
I am looking for a small portable laptop about the size of a DVD player,
with minimum Hard drive size and some memory, something I can load XP on,
and that has a USB port, has a close to possible full size keybd, a sound
card, and runs on 12v battery and/or on a 12v power cord I can plug into a
cigarette lighter.

I want to be able to run some of the HAM digital modes while in the field
and don't want to schlep a heavy laptop around.

I heard that something like this might be available, for a street price of
less than or around $250.00, but I have lost the reference page to it.

73's

Hi Howard,

Many laptop AC power supplies produce about 16VDC. For Field Day use, I
picked up a used laptop of this type for about $380. A coworker (who's a
whiz with switching regulators) designed a boost switching regulator that
will handle up to about 4.5A load:
http://www.geocities.com/bswadener/t...wer_Supply.pdf It'll
maintain the output with as little as 11VDC input. As checked with a
spectrum analyzer, it produces no noticeable noise.

73,
Bryan WA7PRC