MOTM

> It isn't clear from the specs in the catalog what makes the 148-149
> series so much better.  Anybody know?

Spectrol 248/249 parts are 100% plastic construction (not the resistive element,
the physical part). This means plastic shaft and worse, plastic *threads* . NOT
RECOMMENDED. Also, the rotational torque of the shaft  is *very* stiff.

Tried them for 1 run of 1 module, they were not suitable. Stripping of the leads
is VERY EASY to do.

Paul S.