| CODE NO. | PRINCIPLE USES | CLASSIFICATION | CATHODE OR HEATING UNIT | VOLTAGES & CURRENTS OF PLATE & GRIDS | u |
Rp (OHMS) | POWER OUTPUT (WATTS) | MAX SAFE Eb | MICROPHONIC NOISE (DB BELOW 10-5 WATTS) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| If or Ih (Amperes) | Ef or Eh (Volts) | Eb (Volts) | Ec (Volts) | Es (Volts) | Ib (Mils) |
Is (Mils)
|
101-D
|
C, M, R, T
|
F-3
|
0.97
|
4.4
|
130
|
-9.0
|
-
|
8.0
|
-
|
5.9
|
6,000
|
.06
|
160
|
|
101-F
|
C, M, T
|
F-3
|
0.485
|
4.0
|
130
|
-8.0
|
-
|
7.0
|
-
|
6.5
|
6,000
|
.06
|
160
|
19
|
102-D or G
|
C, M, P, R, S, T
|
F-3
|
0.97
|
2.0
|
130
|
-1.5
|
-
|
0.75
|
-
|
30
|
60,000
|
.0042
|
160
|
30
|
102-F
|
C, M, T, S
|
F-3
|
0.485
|
2.0
|
130
|
-1.5
|
-
|
0.75
|
-
|
30
|
60,000
|
.042
|
160
|
20
|
104-D
|
C, M, T
|
F-3
|
0.97
|
4.4
|
130
|
-22.5
|
-
|
20.0
|
-
|
2.5
|
2,300
|
.17
|
160
|
|
205-D | 205-E
C, P, R | P
F-3 | F-3
1.60 | 1.60
4.5 | 4.5
350 | 130
-22.5 | -9.0
-
|
33.0 | 5.0
-
|
7.0 | 6.8
3,500 | 6,600
.07 | .89
350 | 350
25 | 25
215-A
|
R, M
|
F-3
|
0.25
|
1.0
|
67.5
|
-6.0
|
-
|
1.0
|
-
|
6.0
|
18,000
|
.008
|
100
|
27
|
245-A
|
C
|
H-4-Sc
|
1.60
|
2.0
|
180
|
-1.5
|
45
|
5.1
|
1.4
|
170
|
220,000
|
.025
|
200
|
29
|
246-A
|
R
|
F-4-Sc
|
0.10
|
3.4
|
135
|
-1.5
|
45
|
1.5
|
0.2
|
285
|
725,000
|
.028
|
180
|
|
259-A
|
C, R
|
H-4-Sc
|
1.60
|
2.0
|
180
|
-1.5
|
75
|
5.5
|
1.2
|
550
|
400,000
|
.05
|
200
|
20
|
281-A
|
C
|
F-4-Co
|
1.60
|
5.0
|
150
|
-60.0
|
70
|
35.0
|
0.7
|
5.0
|
3,500
|
2.20
|
170
|
|
285-A
|
P, R
|
H-5-P
|
1.60
|
2.0
|
180
|
-12.0
|
150
|
9.0
|
1.6
|
130
|
145,000
|
.65
|
200
|
20
|
310-A
|
C, P
|
H-5-P
|
0.32
|
10.0
|
180
|
-3.0
|
135
|
5.4
|
1.2
|
1800
|
40,000
|
.34
|
250
|
|
311-A
|
C
|
H-5-P
|
0.64
|
10.0
|
155
|
-16.0
|
155
|
40.0
|
3.5
|
85
|
30,000
|
1.80
|
250
|
|
328-A
|
C, P
|
H-5-P
|
0.425
|
7.5
|
180
|
-3.0
|
135
|
5.4
|
2.2
|
1800
|
40,000
|
.34
|
250
|
| |
|
Code for "Principal Use" C = Carrier M = Measuring apparatus P = Public address & Program Pickup R = Radio transmitters & receivers S = Signalling apparatus T = Telephone repeaters |
Code for "Classification" F = Filament type cathode H = Heater type cathode 3, 4, 5 Designate number of electrodes Sc = Screen grid tube Co = Coplanar grid tube P = Pentode |
Page [ 230 ]
Taken from
Principles of Electricity
applied to
Telephone and Telegraph Work
L.L. Dept. AT&T Co.
1938 Edition
(Reprinted with corrections January, 1941)