As I recall, that is a regular (albeit very small) slot head screw. What it
is after twenty or thirty years of diddling with it is anybody's guess.

Jim



"Robert M. Gary" wrote in message
oups.com...
My #2 VOR is the older analog King head feed by a KX-170B. It likes to
get out of adjustment. The local radio shop has told me I should get
the screw driver and adjust it myself off the VOT. If you remove the
set screw that holds the knob on, there is an adjustment screw behind
it. However, the head on that screw is very, very strange and therefore
requires a special driver.

Does anyone know where I can find such a driver??

-Robert