[Johnson] Rotary switch issue

[Robert Nickels]

This is a problem on the Pacemaker I'm working on but since the same 
rotary switches were used on all the EFJ transmitters I thought I'd ask 
to see if anyone else has run into it.

The problem is in the multi-deck bandswitch where a long phenolic shaft 
runs from the front panel knob through all the wafers. What is happening 
is, in the 80 meter position which is at the extreme CCW rotation, the 
wipers on the rear-most wafers aren't reliably making contact with the 
last set of (80M) switch contact fingers.    It's as if the shaft just 
isn't being rotated far enough CCW.   The rotation increments are fixed 
by the detent mechanism on the front end of the shaft and all the wafers 
are supposed to track, but it seems the two furthest away aren't, 
quite.   All the wafers are held in place by spacers so I don't see much 
chance for error or wear.

It's annoying because those wafers connect exciter tuning capacitor 
gangs, and when they don't make contact the exciter doesn't track and 
output power diminishes.  Any suggestions would be welcome!

73, Bob W9RAN