Uncle Peter wrote:
Always do a "mechanical alignment" before doing an electrical one.
That is: check for loose couplers between the dial drives and caps,
make sure the dial pointer physically stops at the correct points at
the rotational stops... That the tuning capacitor plates are fully
unmeshed or meshed at the rotational stops (or as shown by the
manufacturer).

The Trimmer caps SHOULD allow you bring the high
end of the bands into calibration regardless of other issues... The
low end of the band alignment is usually set by the coil slug(s).

Pete



AND the coils and caps interact: if you adjust one significantly, you have
to re-adjust the other. ALSO: if you are doing this with a sig gen, make
sure you are locking onto the actual freq, not some other mixer component
(happened to me).
--
Brian Denley
http://home.comcast.net/~b.denley/index.html