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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 |
|---|---|---|---|---|---|---|---|---|
| 6J8 | 8 | 5 | 6.3 | 41 | 15 | E | AMPL | Mut.Cond.1000. See note D. |
| 6K5 | 7 | 5 | 6.3 | 40 | 17 | E | AMPL | Mut.Cond.1000. |
| 6K6 | 8 | 5 | 6.3 | 55 | 28 | E | AMPL | Mut.Cond.1600. |
| 6K7 | 8 | 5 | 6.3 | 54 | 16 | E | AMPL | Mut.Cond.1450. |
| 6K8 | 8 | 5 | 6.3 | 41 | 9 | E | AMPL | Mut.Cond.1000. See note D. |
| 6K8 | 11 | 5 | 6.3 | 63 | 9 | E | AMPL | Mut.Cond.2400. See note D. |
| 6L5 | 7 | 5 | 6.3 | 56 | 22 | E | AMPL | Mut.Cond.1500. |
| 6L6 | 8 | 5 | 6.3 | 63 | 20 | E | AMPL | Mut.Cond.5000. Set MICROMHOS switch to 6000. |
| 6L7 | 8 | 5 | 6.3 | 20 | 22 | E | AMPL | Mut.Cond.650. See note D. |
| 6L7 | 1 | 9 | 6.3 | 20 | 19 | E | AMPL | Mut.Cond.650. See note D. |
| 6N4 | 7 | 5 | 6.3 | 71 | 17 | L | AMPL | |
| 6N5 | 12 | 2 | 6.3 | 0 | 0 | C | AMPL | Eye closed. |
| 6N5 | 12 | 3 | 6.3 | 0 | 0 | C | AMPL | Eye open. |
| 6N6 | 8 | 5 | 6.3 | 52 | 0 | E | AMPL | Mut.Cond.1500. |
| 6N7 | 2 | 9 | 6.3 | 53 | 10 | E | AMPL | Mut.Cond.1500. |
| 6N7 | 12 | 5 | 6.3 | 53 | 10 | E | AMPL | Mut.Cond.1500. |
| 6P5 | 7 | 5 | 6.3 | 53 | 24 | E | AMPL | Mut.Cond.1450. |
| 6P7 | 6 | 12 | 6.3 | 60 | 23 | E | AMPL | Mut.Cond.450. OK over 360. |
| 6P7 | 3 | 12 | 6.3 | 45 | 23 | E | AMPL | Mut.Cond.1100. |
| 6Q5 | 7 | 5 | 6.3 | 40 | 80 | E | RECT. STD. | Good tube indicates between 40 and 50 when R is rotated counterclockwise. See note D. |
| 6Q6 | 7 | 2 | 6.3 | 0 | 0 | E | DIODE | |
| 6Q6 | 7 | 5 | 6.3 | 40 | 14 | E | AMPL | Mut.Cond.1000. |
| 6Q7 | 10 | 2 | 6.3 | 0 | 0 | E | DIODE | |
| 6Q7 | 10 | 5 | 6.3 | 0 | 0 | E | DIODE | |
| 6Q7 | 7 | 5 | 6.3 | 33 | 14 | E | AMPL | Mut.Cond.800. |
| 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