Tachometer not working

[roadster68 <roadster68@shaw.ca>]

Have my 68 mechanical tach set up and connected to the dash guage.  I can 
hear and feel it turning in its housing but the tach needle does not move 
at all.  Can hardly turn the cable end but had made fairly sure it was on 
tight before doing all the wire hookups.  I am also pretty sure the tach 
worked before starting the vehicle restoration.  Could I have lost a piece 
on one or the other end of the cable?  NOt sure what it would  be.  Any 
thoughts out there?  Larry.