"Nubly" wrote in message
oups.com...

How does one test the G1 voltage and where can i locate a test point.

Is that the G-Spot?

But seriously - Grid 1. Assuming you are not talking triacs,
http://www.repairfaq.org/sam/crtfaq.htm

or

http://www.angelfire.com/electronic/...Multigrid.html

if not a Kine.