| Tube |
A |
B |
Filament |
L |
R |
Socket |
Press |
Notes |
|---|
| 38842 | 2 |
10 | 7.5 | 46 |
50 | A | AMPL |
Mut.Cond.1150. |
| 38853 | 4 |
2 | 6.3 | 71 |
10 | E | AMPL |
Mut.Cond.3500. |
| 38884 | 1 |
6 | 6.3 | 40 |
80 | E | RECT. STD. |
Good tube strikes between 55 and 65 on R when this control is rotated counterclockwise. See note D. |
| 38954 | 6 |
7 | 6.3 | 44 |
17 | M | AMPL |
Mut.Cond.1100. |
| 38955 | 9 |
7 | 6.3 | 59 |
18 | M | AMPL |
Mut.Cond.1900. See note D. |
| 38956 | 6 |
7 | 6.3 | 53 |
14 | M | AMPL |
Mut.Cond.1500. |
| 38959 | 6 |
7 | 1.1 | 10 |
30 | M | AMPL |
Mut.Cond.600. Shorts on 4 and 5. |
| 38968 | 9 |
7 | 1.1 | 32 |
34 | M | AMPL |
Mut.Cond.1200. Shorts on 4 and 5. See note D. |
| 38MG | 8 |
5 | 6.3 | 41 |
32 | ? | AMPL |
Mut.Cond.1050. |
| 39/44 | 7 |
6 | 6.3 | 41 |
23 | B | AMPL |
Mut.Cond.1000. |
| 393A | 2 |
10 | 3 | 40 |
80 | E | RECT. STD. |
Connect plate cap to upper right contact of A socket. Good tube strikes between 30 and 35 on R when this control is rota |
| 394A | 2 |
10 | 2.5 | 40 |
80 | E | RECT. STD. |
Connect plate cap to upper right contact of A socket. Good tube strikes between 30 and 35 on R when this control is rota |
| 3A4 | 11 |
2 | 1.5 | 0 |
82 | H | DIODE |
Shorts on 3, 4, and 5. |
| 3A4 | 10 |
2 | 2.5 | 40 |
0 | H | DIODE |
Shorts on 2, 3, 4, and 5. See note E. |
| 3A5 | 6 |
2 | 3 | 60 |
18 | H | AMPL |
Mut.Cond.2000. Shorts on 4 and 5. |
| 3A5 | 8 |
8 | 3 | 60 |
12 | H | AMPL |
Mut.Cond.2000. Shorts on 4 and 5. See note E. |
| 3A8 | 5 |
1 | 2.5 | 0 |
0 | E | DIODE |
|
| 3A8 | 11 |
5 | 2.5 | 0 |
0 | E | AMPL |
Mut.Cond.500.OK over 400. |
| 3A8 | 8 |
5 | 2.5 | 28 |
10 | E | AMPL |
Mut.Cond.750. Shorts on 1. See note E. |
| 3AL5 | 1 |
1 | 3 | 50 |
0 | K | DIODE |
Diode Section 2 Short on 2. |
| 3AL5 | 12 |
2 | 3 | 50 |
0 | K | DIODE |
Diode Section 1 Short on 2. |
| 3AU6 | 1 |
9 | 3 | 62 |
16 | K | AMPL |
Mut.Cond.2300. |
| 3AV6 | 2 |
8 | 3 | 0 |
0 | K | DIODE |
Diode No. 2 |
| 3AV6 | 3 |
8 | 3 | 0 |
0 | K | DIODE |
Diode No. 1 |
| 3AV6 | 12 |
2 | 3 | 50 |
10 | K | AMPL |
Mut.Cond.1250.Triode Section. |
| 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. |
Home
Technical Info
