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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 |
|---|---|---|---|---|---|---|---|---|
| 75 | 10 | 6 | 6.3 | 0 | 0 | C | DIODE | |
| 75 | 7 | 6 | 6.3 | 28 | 9 | C | AMPL | Mut.Cond.750. |
| 7543 | 2 | 8 | 6.3 | 0 | 0 | K | DIODE | Diode No. 2 |
| 7543 | 3 | 8 | 6.3 | 0 | 0 | K | DIODE | Diode No. 1 |
| 7543 | 12 | 2 | 6.3 | 50 | 10 | K | AMPL | Mut.Cond.1250. Triode Section. |
| 75MG | 12 | 5 | 6.3 | 0 | 0 | E | DIODE | |
| 75MG | 12 | 2 | 6.3 | 0 | 0 | E | DIODE | |
| 75MG | 9 | 5 | 6.3 | 28 | 9 | E | AMPL | Mut.Cond.750. |
| 76 | 1 | 6 | 6.3 | 53 | 24 | B | AMPL | Mut.Cond.1450. |
| 7693 | 1 | 9 | 6.3 | 60 | 12 | A | AMPL | Mut.Cond.2000. |
| 7694 | 7 | 9 | 6.3 | 70 | 10 | K | AMPL | Mut.Cond.3800. |
| 77 | 2 | 5 | 6.3 | 48 | 17 | C | AMPL | Mut.Cond.1225. |
| 7700 | 1 | 7 | 6.3 | 49 | 17 | C | AMPL | Mut.Cond.1225. |
| 7728 | 4 | 2 | 12.6 | 15 | 25 | E | AMPL | Use adapter #6 for triode #2. |
| 7728 | 4 | 2 | 12.6 | 15 | 25 | E | AMPL | Use adapter #5 for triode #1. |
| 7730 | 4 | 2 | 12.6 | 60 | 25 | E | AMPL | Use adapter #6 for triode #2. |
| 7730 | 4 | 2 | 12.6 | 60 | 25 | E | AMPL | Use adapter #5 for triode #1. |
| 7732 | 1 | 9 | 6.3 | 62 | 18 | K | AMPL | Mut.Cond.2200. |
| 7752 | 1 | 9 | 6.3 | 42 | 15 | K | AMPL | Mut.Cond.1750. |
| 7755 | 1 | 9 | 6.3 | 65 | 22 | K | AMPL | Mut.Cond.2750.Shorts on 4 and 5. |
| 7756 | 8 | 5 | 6.3 | 71 | 36 | E | AMPL | Use Adapter # 3. |
| 7758 | 8 | 5 | 6.3 | 71 | 36 | E | AMPL | Use Adapter # 3. |
| 78 | 2 | 5 | 6.3 | 54 | 20 | C | AMPL | Mut.Cond.1450. |
| 79 | 5 | 10 | 6.3 | 39 | 12 | C | AMPL | Mut.Cond.1000. |
| 79 | 2 | 10 | 6.3 | 39 | 12 | C | AMPL | Mut.Cond.1000. |
| 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
Cape Old Radio - Since Nov, 1996
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