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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 |
|---|---|---|---|---|---|---|---|---|
| 38213 | 2 | 10 | 2.5 | 67 | 55 | A | AMPL | Mut.Cond.3000. |
| 38215 | 8 | 5 | 2.5 | 60 | 24 | C | AMPL | Mut.Cond.2000. |
| 38227 | 10 | 3 | 2.5 | 0 | 0 | D | DIODE | Diode No. 2 |
| 38227 | 10 | 6 | 2.5 | 0 | 0 | D | DIODE | Diode No. 1 |
| 38227 | 7 | 6 | 2.5 | 41 | 25 | D | AMPL | Mut.Cond.1000. |
| 38233 | 9 | 3 | 6.3 | 42 | 28 | D | AMPL | Mut.Cond.1000. |
| 38233 | 3 | 3 | 6.3 | 42 | 28 | D | AMPL | Mut.Cond.1000. |
| 38236 | 9 | 7 | 2 | 60 | 41 | C | AMPL | Mut.Cond.300. Osc.Sect. OK over 240 on 3000 scale. See note D. |
| 38236 | 1 | 5 | 2 | 20 | 24 | C | AMPL | Mut.Cond.650. See note D. |
| 38250 | 7 | 1 | 0 | 30 | 0 | G | GAS No. 1 | Shorts on 4 and 5. See note D. |
| 38255 | 12 | 8 | 25 | 40 | 0 | C | RECT. STD. | See note D. |
| 38255 | 7 | 8 | 25 | 40 | 0 | C | RECT. STD. | See note D. |
| 38266A | 7 | 1 | 3 | 30 | 0 | A | RECT. STD. | See notes A and D. OK over 1500. |
| 38267 | 7 | 1 | 2.5 | 35 | 0 | A | RECT. STD. | See notes A and D. |
| 38274 | 4 | 5 | 0 | 30 | 0 | A | GAS No. 1 | See note D. |
| 38275 | 7 | 1 | 0 | 50 | 0 | G | GAS No. 1 | Shorts on 4 and 5. See note D. |
| 38290 | 7 | 1 | 0 | 30 | 0 | G | GAS No. 1 | Shorts on 4 and 5. |
| 38405 | 1 | 5 | 2.5 | 40 | 0 | A | RECT. STD. | See note D. |
| 38565J | 7 | 5 | 6.3 | 60 | 24 | E | AMPL | Mut.Cond.2000. |
| 38566H | 7 | 5 | 6.3 | 50 | 0 | E | DIODE | |
| 38566H | 7 | 2 | 6.3 | 50 | 0 | E | DIODE | |
| 38567K | 8 | 5 | 6.3 | 54 | 16 | E | AMPL | Mut.Cond.1450. |
| 38567R | 10 | 2 | 6.3 | 0 | 0 | E | DIODE | |
| 38567R | 10 | 5 | 6.3 | 0 | 0 | E | DIODE | |
| 38567R | 7 | 5 | 6.3 | 60 | 17 | E | AMPL | Mut.Cond.1900. |
| 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
1996 - 2026 © Carlos Eduardo Lazarini da Fonseca