[klondike98]

You can look up the pin layout and tube data at the following database (there are others):
http://www.nj7p.info/

Click on the "Tube SQL Database", enter your tube number and click "Lookup".
It will give you a diagram of the tube with the pin numbers.

Here's an explanation of how to count pin numbers when looking at the bottom of the tube: http://www.dogstar.dantimax.dk/tubestuf/pinout.htm