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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 |
|---|---|---|---|---|---|---|---|---|
| 38076 | 1 | 6 | 6.3 | 53 | 24 | B | AMPL | Mut.Cond.1450. |
| 38077 | 2 | 5 | 6.3 | 48 | 17 | C | AMPL | Mut.Cond.1225. |
| 38078 | 2 | 5 | 6.3 | 54 | 20 | C | AMPL | Mut.Cond.1450. |
| 38085 | 10 | 3 | 6.3 | 0 | 0 | C | DIODE | Diode No. 2 |
| 38085 | 10 | 6 | 6.3 | 0 | 0 | C | DIODE | Diode No. 1 |
| 38085 | 7 | 6 | 6.3 | 40 | 32 | C | AMPL | Mut.Cond.975. |
| 38089 | 2 | 5 | 6.3 | 54 | 30 | C | AMPL | Mut.Cond.1550. |
| 38102 | 2 | 10 | 5 | 57 | 36 | A | AMPL | |
| 38110 | 2 | 10 | 7.5 | 50 | 32 | A | AMPL | Mut.Cond.1250. |
| 38112 | 2 | 10 | 5 | 57 | 36 | A | AMPL | Mut.Cond.1650. |
| 38142 | 2 | 10 | 7.5 | 62 | 30 | A | AMPL | Mut.Cond.2200. |
| 38143 | 1 | 6 | 2.5 | 56 | 10 | B | AMPL | Mut.Cond.1625. |
| 38165 | 10 | 4 | 7.5 | 16 | 28 | A | AMPL | Mut.Cond.625. See note A. |
| 38166A | 7 | 1 | 2.5 | 40 | 0 | A | RECT. STD. | See notes A and D. |
| 38171 | 7 | 1 | 2.5 | 20 | 0 | A | RECT. STD. | See note D. |
| 38180 | 3 | 7 | 5 | 35 | 0 | A | RECT. STD. | See note D. |
| 38180 | 2 | 7 | 5 | 35 | 0 | A | RECT. STD. | See note D. |
| 38181 | 2 | 7 | 7.5 | 33 | 0 | A | RECT. STD. | See note D. |
| 38182 | 3 | 7 | 2.5 | 40 | 0 | A | RECT. STD. | See note D. |
| 38182 | 2 | 7 | 2.5 | 40 | 0 | A | RECT. STD. | See note D. |
| 38183 | 3 | 7 | 5 | 40 | 0 | A | RECT. STD. | See note D. |
| 38183 | 2 | 7 | 5 | 40 | 0 | A | RECT. STD. | See note D. |
| 38184 | 5 | 1 | 6.3 | 40 | 0 | B | RECT. STD. | See note D. |
| 38184 | 7 | 7 | 6.3 | 40 | 0 | B | RECT. STD. | See note D. |
| 38205 | 7 | 1 | 0 | 30 | 0 | G | GAS No. 1 | Shorts on 4 and 5. See note D. |
| 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