A Simple, Valve Curve Plotter

[pwdrive]

Whoops...Forgot the 2 volt figures I jotted down:

2 volt heaters at 25 ma:
R = 240 ohms, Pd = .15 watts

2 volt heaters at 100 ma:
R = 60 ohms, Pd = .6 watts

2 volt heaters at 250 ma:
R = 24 ohms, Pd = 1.5 watts.

Lawrence.