I'd never heard of one of these going out of calibration. They seem to give
true frequency reout. I've had no porblem with mine nor have the two kids to
which I gave each one.

Now the PPL in the thing could be unlocking. That happens to often with my
Grundig eTR7, which is a digitally tuned job, at least is does when I turn it
right back on after it times out and shuts off.

Bill, K5BY