Cant answer #1
(2) Not having a Hammond in front of me, it makes sense that the vibrato
line
caps are non-polarized, in spite of the curved+straight plate on the
schematic... Hammond schematics don't seem to be consistent even in
marking
power supply filter cap + sides (although it's obvious from the circuits)
and
when I learned electronics, one used parallel plates for non-polarized
caps.
Am I right ?
Capacitors are often represented schematically with a straight and a curved
line.
The curved line represents the outside foil. In certain applications
additional
shielding can be accomplished by hooking the outside foil to ground. I
don't
know if this was actually done on the Hammond vibrato line boxes, but it was
always a good idea. Many capacitors are marked with a line on one end
which is the outside foil connection. The same schematic symbol (one
straight,
one curved line) is used for polarized capacitors in lieu of marking one
side with
a "+" symbol. I have seen both used together.
R.Ahlvin
