In article ,
john smith wrote:

Oops!
I guess I got my code squawks backwards.
Should have typed 7700 for one-minute, then 7600 for the remainder of
the flight.

If you want to squawk "Lost Comm", just set 7600 and leave it there.

The "7700 for one minute, then 7600" procedure predates me, but I
understand that a long time ago (like 15 or 20 years), that was how it was
done. No longer the case.