Smith's Tachometer Information

This info is presented for reference only...it is unconfirmed by me (it has been a long time since I've been inside a tach, and the last time I had one open, I didn't take any pix).  The next time I have one apart, I intend to confirm the circuit within is as shown below, and add more info here.

This info is pretty much the same as can be found with searches...

Link to Brickboard Thread of subject of tach:  http://www.brickboard.com/RWD/index.htm?id=1190301

...and a Link from that Thread to an informative site mentioned:  http://www.classictiger.com/techtips/motach.html

Link to UK Volvo Forum Thread:  http://www.volvoforums.org.uk/showthread.php?t=48795

PLACEHOLDER FOR CIRCUIT DIAGRAM PENDING PERMISSION TO POST.