<VV> Zeroing a Tach--Followup

[Charles Morgan]

Thanks to Tony Underwoood for pointing out the zero-adjustment tab.  A 
black wire goes from the circuit board to the back side of the movement 
itself.  The wire is connected to a tab which is also connected to the rear 
spring mechanism.  Rotating the tab rotates the initial (non-energized) 
direction of the pointer.  After I zeroed the movement, I applied a 250Hz, 
0-12V square wave and adjusted the tach for 5000 rpm.  I double checked 
with my old Heathkit tach that also read 5000 rpm on the button.  So I'm 
back in business.  Thanks to all who responded, especially Tony.

Charlie Morgan
Beaver State Corvairs