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I-177 Tube Tester
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Select or type a tube name to get specific settings for the I-177 Tube Tester.
Sort columns values by clicking their titles - A → Z or Z → A
| Tube | A | B | Filament | L | R | Socket | Press | Notes |
|---|---|---|---|---|---|---|---|---|
| 482A | 2 | 10 | 5 | 50 | 65 | A | AMPL | Mut.Cond.1500. |
| 482B | 2 | 10 | 5 | 58 | 57 | A | AMPL | Mut.Cond.1500. |
| 483 | 2 | 10 | 5 | 50 | 65 | A | AMPL | Mut.Cond.1350. |
| 484 | 1 | 6 | 3 | 49 | 30 | B | AMPL | Mut.Cond.1300. |
| 484A | 1 | 6 | 3 | 49 | 30 | B | AMPL | Mut.Cond.1300. |
| 485 | 1 | 6 | 3 | 49 | 30 | B | AMPL | Mut.Cond.1300. |
| 486 | 1 | 6 | 3 | 60 | 35 | B | AMPL | Mut.Cond.450. MICROMHOS only. OK over 360 on 3000 scale. |
| 49 | 1 | 5 | 2 | 45 | 40 | B | AMPL | MutCond.1125. |
| 4A6G | 12 | 5 | 3 | 41 | 13 | E | AMPL | Mut.cond.1000. Plate #2. |
| 4A6G | 2 | 9 | 3 | 41 | 0 | E | AMPL | Mut.Cond.1000. Plate #1. |
| 4AU6 | 1 | 9 | 4.3 | 62 | 16 | K | AMPL | Mut.Cond.2300. |
| 4AV6 | 2 | 8 | 4.3 | 0 | 0 | K | DIODE | Diode No. 2 |
| 4AV6 | 3 | 8 | 4.3 | 0 | 0 | K | DIODE | Diode No. 1 |
| 4AV6 | 12 | 2 | 4.3 | 50 | 10 | K | AMPL | Mut.Cond.1250. Triode Section. |
| 4BN6 | 10 | 4 | 4.3 | 0 | 0 | K | AMPL | Mut.Cond.500. |
| 4BZ6 | 1 | 9 | 4.3 | 64 | 17 | K | AMPL | Mut.Cond.2500. |
| 4CB6 | 1 | 9 | 4.3 | 62 | 18 | K | AMPL | Mut.Cond.2200. |
| 4CS6 | 4 | 9 | 4.3 | 30 | 33 | K | AMPL | Mut.Cond.800. |
| 4DE6 | 1 | 9 | 4.3 | 62 | 18 | K | AMPL | Mut.Cond.2200. |
| 50 | 2 | 10 | 7.5 | 53 | 50 | A | AMPL | Mut.Cond.1500. |
| 501-A Boonton | 10 | 3 | 2.5 | 0 | 0 | C | DIODE | Diode No. 2 |
| 501-A Boonton | 10 | 6 | 2.5 | 0 | 0 | C | DIODE | Diode No. 1 |
| 501-A Boonton | 7 | 6 | 2.5 | 28 | 9 | C | AMPL | Mut.Cond.750. Triode Sect. |
| 50A5 | 6 | 2 | 50 | 74 | 25 | F | AMPL | Mut.Cond.7500. |
| 50B5 | 8 | 5 | 50 | 74 | 19 | L | AMPL | Mut.Cond.7500. |
| 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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Last modified: Jun 5, 2026 20:40
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