Tom Bruhns wrote:

There's a mechanical switch on the slide-rule tuning mechanism.

Presumably it's a bit different in mine, since there is no slide-rule
tuning mechanism. I'll have to have a look.

IIRC, there *is* a switch in the tuning mechanism, and it switches
filters right at the midpoint of the band. I can't find my copy of
the manual to confirm that. *sigh*

--
Mike Andrews

Tired old sysadmin since 1964