This is an archived website which has not been updated since 2002. Some information may be inaccurate or out of date. |
The type number consists of a number followed by a capital letter, a figure and in some cases by a second capital letter (e.g. 85A2, 150C1K).
Number (average burning voltage in volts)
First letter (current range)
A - max. 10 mA
B - max. 22mA
C - max. 40mA
D - max. 100mA
E - max. 200 mA
Figure (serial number)
Second letter (tube base)
E - Edison
K - Octal 8-pin base
P - P-base
Back to Technical index