On Nov 30, 12:07*pm, Gunner Asch wrote:
On Mon, 30 Nov 2009 04:23:31 -0800 (PST), Jim Wilkins
wrote:

http://www.eham.net/forums/EmergencyCommunications/4312

Just leave the battery disconnected.

jsw

Blink blink...huh???

Gunner

The EMP creates a high voltage spike but unlike lightning it carries
little energy, The heating power that fries semiconductors when the
EMP has turned them all on comes from the battery. Curve tracers,
hipotters etc that apply and measure similar breakdown voltages aren't
destructive because their output current is limited to very low
values. I built a machine once that zapped production high voltage
diodes with up to 40,000V to verify their Peak Reverse Voltage,
limited to a microamp by a large vacuum tube.

That's a simplified civilian explanation. If you are curious the ham
radio community knows a lot more of the unclassified details.

jsw