Now to deal with the 3/8 spindle. Not an
engineer? Here is a DIY solution. Drill through the
centre hole of a furniture corner block 1/4 inch dia.
Then drill halfway through 3/8 inch dia. Cut the block
through as shown. File a bit more off the cut faces if
Clamp the block onto the capacitor shaft
with a short length of 1/4 inch spindle as shown. Apply a
tiny drop of oil to the bearings. Finally, if you have
the equipment, check the insulation of each gang to 500vdc.
Check for good continuity between each set of moving
vanes and the framework. As I said at the beginning, this
is a poor example, still rusty but clean and very usable.
By the way, the date stamped on the front plate is 16 Nov
1942. This paticular example was given to a friend who
used it for the tuning capacitor in a Z match which he
sometimes runs at 200 watts!