On Sun, 23 Jan 2011 23:18:53 +0000, Alan wrote:


The tuning frequency probably drifts with the terminal voltage of the
battery which would tie in with people complaining that they only work
for the first 20 operations (with a new battery) and one user adjusting
the settings.

Not my experience so far and it's certainly a lot more than 20, but it will be
interesting to see if you're right over a few months.