1st letter |
heater |
0 |
tube without heater |
A |
4 V AC parallel |
B |
180 mA DC |
C |
200 mA AC/DC serial or parallel |
D |
0.62, 1.25, 1.4 V parallel |
E |
6.3 V AC/DC parallel |
F |
12.6 V DC |
G |
5V AC parallel |
H |
early: 4V DC later: 150mA AC/DC serial |
I |
20V AC/DC parallel |
K |
2 V DC |
L |
450 mA AC/DC |
O |
150 mA AC/DC serial |
P |
300 mA AC/DC serial |
T |
7.4 V, other |
U |
100 mA AC/DC serial |
V |
50mA AC/DC serial |
X |
600 mA AC/DC serial |
Y |
450 mA AC/DC serial |
|
|
next letter(s) |
construction |
A |
diode |
B |
duodiode |
C |
triode |
D |
power triode |
E |
tetrode |
F |
pentode |
H |
hexode or heptode |
K |
octode |
L |
power tetrode or pentode |
M |
indicator tube |
N |
thyratron |
Q |
nonode |
S |
TV sync. oscillator |
T |
beam tube |
W |
half-wave gas-filled rectifier |
X |
full-wave gas-filled rectifier |
Y |
half-wave rectifier |
Z |
full-wave rectifier |
|
|
next number(s)
|
base and serial number |
1-10 |
various side contacts, octals, specials |
11-19 |
8 pin German octal |
20-29 |
loctal B8G, some octal |
30-39 |
international octal |
40-49 |
rimlock B8A |
50-59 |
B9G, loctal B8G, octal, 3 pin glass, disk-seal, German 10 pin with spigot, min. 4-pin, B26A, magnoval B9D |
60-69 |
B9G, some subminiatures |
70-79 |
loctal Lorenz, wire subminiatures |
80-89 |
noval B9A |
90-99 |
B7G |
100-109 |
B7G, Wermacht base, German PTT base |
110-119 |
8 pin German octal, rimlok B8A |
130-139 |
octal |
150-159 |
German 10 pin with spigot, 10 pin glass with one big pin, octal |
160-169 |
Flat wire submins, 8 pin German octal |
170-179 |
RFT 8 pin, RFT 11 pin all glass with one offset pin |
180-189 |
noval B9A |
190-199 |
B7G |
200-209 |
decal B10B |
230-239 |
octal |
270-279 |
RFT 11 pin all glass with 1 offset pin |
280-289 |
noval B9A |
300-399 |
octal |
400-499 |
rimlok B8A |
500-529 |
magnoval B9D, novar |
600-699 |
flat wire-ended |
700-799 |
round wire-ended |
800-899 |
noval B9A |
900-999 |
B7G |
1000- |
round wire-ended, special nuvistor |
2000- |
decal B10B |
3000- |
octal |
5000- |
magnoval B9D |
8000- |
noval B9A |