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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 |
|---|---|---|---|---|---|---|---|---|
| 38032 | 2 | 5 | 2 | 19 | 30 | A | AMPL | Mut.Cond.640. |
| 38032A | 2 | 5 | 2 | 18 | 29 | A | AMPL | |
| 38033 | 1 | 5 | 2 | 50 | 29 | B | AMPL | Mut.Cond.1450. |
| 38034 | 2 | 5 | 2 | 14 | 27 | A | AMPL | Mut.Cond.600. |
| 38035 | 7 | 6 | 2.5 | 42 | 20 | B | AMPL | Mut.Cond.1020. |
| 38036 | 7 | 6 | 6.3 | 43 | 20 | B | AMPL | Mut.Cond.1050. |
| 38037 | 1 | 6 | 6.3 | 36 | 34 | B | AMPL | Mut.Cond.900. |
| 38038 | 7 | 6 | 6.3 | 41 | 32 | B | AMPL | Mut.Cond.1050. |
| 38039 | 7 | 6 | 6.3 | 41 | 23 | B | AMPL | Mut.Cond.1000. |
| 38040 | 2 | 10 | 5 | 60 | 26 | A | AMPL | Mut.Cond.200. OK over 160. |
| 38041 | 8 | 5 | 6.3 | 55 | 28 | C | AMPL | Mut.Cond.1600. |
| 38042 | 8 | 5 | 6.3 | 60 | 24 | C | AMPL | Mut.Cond.2000. |
| 38045 | 2 | 10 | 2.5 | 59 | 50 | A | AMPL | Mut.Cond.1850. |
| 38047 | 1 | 5 | 2.5 | 60 | 18 | B | AMPL | Mut.Cond.2000. |
| 38050 | 2 | 10 | 7.5 | 53 | 50 | A | AMPL | Mut.Cond.1500. |
| 38053 | 12 | 5 | 2.5 | 53 | 10 | D | AMPL | Mut.Cond.1500. |
| 38056 | 1 | 6 | 2.5 | 53 | 26 | B | AMPL | Mut.Cond.1450. |
| 38057 | 2 | 5 | 2.5 | 48 | 17 | C | AMPL | Mut.Cond.1225. |
| 38058 | 2 | 5 | 2.5 | 54 | 20 | C | AMPL | Mut.Cond.1450. |
| 38059 | 8 | 8 | 2.5 | 60 | 18 | D | AMPL | Mut.Cond.2000. |
| 38064 | 2 | 10 | 1.1 | 18 | 37 | A | AMPL | Mut.Cond.650. |
| 38071 | 2 | 10 | 5 | 56 | 60 | A | AMPL | Mut.Cond.1650. |
| 38075 | 10 | 3 | 6.3 | 0 | 0 | C | DIODE | Diode No. 2 |
| 38075 | 10 | 6 | 6.3 | 0 | 0 | C | DIODE | Diode No. 1 |
| 38075 | 7 | 6 | 6.3 | 28 | 9 | C | AMPL | Mut.Cond.750. |
| 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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