On Thu, 1 Feb 2001 13:02:29 -0000 , you wrote:
A pair of car batteries used on a /P expedition could easily
discharge to 20V. The modern high power DMOS devices (for
1.3, 2.3 and 3.4 GHz) that this PSU is aimed at powering
like a constant 28V Vcc so a straightforward SMPSU looks the
obvious solution. If two batteries have to be used, then
used in parallel they can be charged together from a car engine.
Also, the same PSU design can be adapted for 50V devices
which would need 4 batteries in series.
Good reason, it is just that the EMC engineer in me has a pronounced dislike of
any switching devices near radios!
Nick
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