| Tube |
A |
B |
Filament |
L |
R |
Socket |
Press |
Notes |
|---|
| 293A | 8 |
5 | 10 | 43 |
31 | C | AMPL |
|
| 2A3 | 2 |
10 | 2.5 | 67 |
55 | A | AMPL |
Mut.Cond.3000. |
| 2A3H | 2 |
10 | 2.5 | 67 |
55 | A | AMPL |
Mut.Cond.3000. |
| 2A4 | 7 |
5 | 2.5 | 36 |
80 | E | RECT. STD. |
Good tubes strikes between 35 and 45 on R when this control is rotated counterclockwise. See note D. |
| 2A5 | 8 |
5 | 2.5 | 60 |
24 | C | AMPL |
Mut.Cond.2000. |
| 2A6 | 10 |
3 | 2.5 | 0 |
0 | C | DIODE |
|
| 2A6 | 10 |
6 | 2.5 | 0 |
0 | C | DIODE |
|
| 2A6 | 7 |
6 | 2.5 | 28 |
9 | C | AMPL |
Mut.Cond.750. Triode Sect. |
| 2A7 | 10 |
6 | 2.5 | 60 |
25 | D | AMPL |
Mut.Cond.400.Good over 320. See Note D. |
| 2A7 | 7 |
6 | 2.5 | 41 |
18 | D | AMPL |
Mut.Cond.1000. See note D. |
| 2B21 | 7 |
1 | 2.5 | 0 |
0 | A | RECT. STD. |
OK over 1000. See notes A and D. |
| 2B23 | 7 |
5 | 6.3 | 66 |
0 | E | 0Z4 |
|
| 2B26 | 2 |
7 | 2.5 | 40 |
0 | A | RECT. STD. |
|
| 2B4 | 1 |
6 | 2.5 | 40 |
80 | B | RECT. STD. |
Good tubes strikes between 45 and 55 on R when this control is rotated counterclockwise. See note D. |
| 2B6 | 7 |
6 | 2.5 | 64 |
12 | D | AMPL |
Mut.Cond.2500. Shorts on 3. |
| 2B6 | 3 |
2 | 2.5 | 15 |
30 | D | AMPL |
Mut.Cond.600. |
| 2B7 | 10 |
3 | 2.5 | 0 |
0 | D | DIODE |
|
| 2B7 | 10 |
6 | 2.5 | 0 |
0 | D | DIODE |
|
| 2B7 | 7 |
6 | 2.5 | 41 |
25 | D | AMPL |
Mut.Cond.1000. |
| 2C21 | 3 |
3 | 6.3 | 51 |
14 | D | AMPL |
Mut.Cond.1350. Plate #2. |
| 2C21 | 10 |
3 | 6.3 | 51 |
14 | D | AMPL |
Mut.Cond.1350. Plate #1. |
| 2C22 | 7 |
2 | 6.3 | 67 |
11 | E | AMPL |
Mut.Cond.3000. See note B. |
| 2C23 | 2 |
10 | 7.5 | 50 |
32 | A | AMPL |
Mut.Cond.1250. |
| 2C26 | 7 |
2 | 6.3 | 54 |
15 | E | AMPL |
Mut.Cond.1500. See note A. |
| 2C26A | 7 |
2 | 6.3 | 54 |
15 | E | AMPL |
See note A. |
| Important |
|
This I-177 data-base was created using data from I-177 beta 1.08 worksheet, from July 5, 2002.
A great compilation by Nolam E. Lee. |
|
Note A: The plate cap of the tube under test should be connected to the upper left
contact of the 6-pin (C) socket. A 12-inch lead with clip and bananna plug is provided for this purpose. |
|
Note B: Connect the plate cap (nearest the operator) to the upper left contact of the 6-pin (C) socket;
use the lead provided. Connect the grid lead to the remaining cap on the tube. |
|
Note C: Set the MICROMHOS switch at 6000 when testing this section if the tube tester bears either
Order No. 27613-Phila-44-52 or 52346-Phila-45-10 on the nomenclature plate. |
|
Note D: This test is only a partial indication of a good tube. A complete test is only possible
when using equipment. |
|
Note E: Do not tap on this tube when testing for short because damage to the tube may result. |
|
Note F: The Mutual Conductance values listed are averages for new tubes and only for a guide. |
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