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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 |
|---|---|---|---|---|---|---|---|---|
| NR68 (Brit.) | 10 | 5 | 6.3 | 0 | 0 | E | DIODE | |
| NR68 (Brit.) | 7 | 5 | 6.3 | 33 | 14 | E | AMPL | Mut.Cond.800. |
| NR68 (Brit.) | 10 | 2 | 6.3 | 0 | 0 | E | DIODE | |
| NR78 (Brit.) | 7 | 5 | 6.3 | 60 | 17 | E | AMPL | Mut.Cond.2000. |
| NR78A (Brit.) | 7 | 5 | 6.3 | 60 | 24 | E | AMPL | Mut.Cond.2000. |
| NR81 (Brit.) | 8 | 5 | 6.3 | 54 | 16 | E | AMPL | Mut.Cond.1450. |
| P861 | 5 | 1 | 6.3 | 40 | 0 | B | RECT. STD. | |
| P861 | 7 | 7 | 6.3 | 40 | 0 | B | RECT. STD. | |
| PJ-7 | 2 | 8 | 5 | 25 | 12 | A | AMPL | Mut.Cond.750. |
| PJ-8 | 2 | 10 | 5 | 49 | 21 | A | AMPL | Mut.Cond.1300 |
| PZ | 1 | 5 | 2.5 | 60 | 18 | B | AMPL | Mut.Cond.2000. |
| PZH | 8 | 8 | 2.5 | 63 | 25 | C | AMPL | Mut.Cond.2400. |
| R-6175B | 5 | 11 | 5 | 40 | 0 | E | RECT. STD. | See note D. |
| R-6175B | 4 | 11 | 5 | 40 | 0 | E | RECT. STD. | See note D. |
| R-6200 | 4 | 8 | 6.3 | 40 | 80 | K | RECT. STD. | Good tube strikes between 25 and 30 on R when this control is rotated counterclockwise. Shorts on 2 and 3. See note D. |
| R-6269 | 4 | 2 | 6.3 | 60 | 0 | K | DIODE | Shorts on 2 and 3. |
| R-6269 | 9 | 2 | 6.3 | 60 | 0 | K | DIODE | Shorts on 2 and 3. |
| R612G | 7 | 1 | 2.5 | 0 | 0 | A | RECT. STD. | OK over 1000. See notes A and D. |
| R6272 | 10 | 2 | 6.3 | 33 | 0 | E | RECT. STD. | Plate No. 2. |
| R6272 | 2 | 9 | 6.3 | 33 | 0 | E | RECT. STD. | Plate No. 1. |
| R6277 | 3 | 5 | 6.3 | 35 | 0 | K | RECT. STD. | Plate # 1. See note D. |
| R6277 | 6 | 5 | 6.3 | 35 | 0 | K | RECT. STD. | Plate # 2. See note D. |
| RE1 | 3 | 7 | 5 | 35 | 0 | A | RECT. STD. | |
| RE1 | 2 | 7 | 5 | 35 | 0 | A | RECT. STD. | |
| RE2 | 2 | 7 | 7.5 | 33 | 0 | A | RECT. STD. | |
| 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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