[aprssig] Suggestions for Automatic Power Off/Power On circuit for mobile rigs?

[James Jefferson Jarvis]

> I'd also like to have my GPS powered off, as well, since it draws about
> 100ma, and I'd like to keep battery drain to an absolute minimum,
> especially when it's -30 degrees out.  Therefore, using the rig's
> built-in APO is possible, but that doesn't help me with the GPS.

I've used small reed relay that sucks power from the Kenwood TM-D700 
microphone connector to power the GPS on and off. That way the GPS is on when 
the radio is on only. On the Kenwoods there is 8 volts @ ~100mA on the 
microphone RJ-45 connector.

-Jim KB0THN