[Elecraft] Fool proof kill switch = deadman timer?

[Jim Miller]

In considering remote operation options I'm still struggling with how to
implement a kill switch that is foolproof.

Last night we had several power glitches that left our Comcast modem hung
up. There was really no service outage in the area so all it took was
unplugging and replugging the modem to restore it. Of course it took nearly
5 minutes to completely come alive with internet service active.

This happens often enough that it makes me concerned that if internet
service is interrupted while I'm operating remotely I wouldn't be able to
kill the transmitter output.

So I'm wondering if a better option is to have a deadman timer to kill the
K3 and amp output. Not sure what criteria I would use to reset the deadman.
I'm sure a Raspberry Pi or similar could be programmed to do the work.

Suggestions welcomed!

jim ab3cv