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Sort columns values by clicking their titles - A → Z or Z → A
| Tube | A | B | Filament | L | R | Socket | Press | Notes |
|---|---|---|---|---|---|---|---|---|
| 38568K | 11 | 5 | 6.3 | 63 | 9 | E | AMPL | Mut.Cond.2400. See note D. |
| 38568K | 8 | 5 | 6.3 | 41 | 9 | E | AMPL | Mut.Cond.1000. See note D. |
| 38593 | 3 | 7 | 5 | 40 | 0 | A | RECT. STD. | See note D. |
| 38593 | 2 | 7 | 5 | 40 | 0 | A | RECT. STD. | See note D. |
| 38616 | 12 | 5 | 6.3 | 53 | 10 | D | AMPL | Mut.Cond.1500. |
| 38616 | 1 | 5 | 6.3 | 53 | 10 | D | AMPL | Mut.Cond.1500. |
| 38617 | 10 | 6 | 6.3 | 60 | 25 | D | AMPL | Mut.Cond.400. OK over 320. See note D. |
| 38617 | 7 | 6 | 6.3 | 41 | 18 | D | AMPL | Mut.Cond.1000. See note D. |
| 38627 | 10 | 3 | 6.3 | 0 | 0 | D | DIODE | |
| 38627 | 10 | 6 | 6.3 | 0 | 0 | D | DIODE | |
| 38627 | 7 | 6 | 6.3 | 41 | 25 | D | AMPL | Mut.Cond.1000. |
| 38636 | 1 | 7 | 6.3 | 49 | 17 | C | AMPL | Mut.Cond.1225. |
| 38646 | 1 | 7 | 6.3 | 56 | 17 | C | AMPL | Mut.Cond.1600. |
| 38655 | 12 | 2 | 6.3 | 0 | 0 | C | AMPL | Eye closed. |
| 38655 | 12 | 3 | 6.3 | 0 | 0 | C | AMPL | Eye open. |
| 38667 | 10 | 6 | 6.3 | 60 | 23 | D | AMPL | Mut.Cond.450. OK over 360. |
| 38667 | 7 | 6 | 6.3 | 45 | 23 | D | AMPL | Mut.Cond.1100. |
| 38717E | 8 | 8 | 2 | 45 | 17 | E | AMPL | Mut.Cond.1150. |
| 38717E | 11 | 6 | 2 | 45 | 17 | E | AMPL | Mut.Cond.1150. |
| 38765J | 7 | 5 | 6.3 | 60 | 24 | E | AMPL | Mut.Cond.2000. |
| 38766Y | 8 | 5 | 6.3 | 60 | 42 | E | AMPL | Set MICROMHOS switch at 6000. |
| 38768F | 11 | 7 | 6.3 | 60 | 13 | E | AMPL | Mut.Cond.2000. Plate No. 2. |
| 38768F | 8 | 7 | 6.3 | 60 | 13 | E | AMPL | Mut.Cond.2000. Plate No. 1. |
| 38807 | 12 | 1 | 6.3 | 70 | 27 | B | AMPL | Mut.Cond. 3500. Connect plate to top left contact of 6 pin socket. |
| 38837 | 10 | 3 | 12.6 | 71 | 0 | D | AMPL | See note A. |
| 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. |
Last modified: Jun 5, 2026 20:40
Cape Old Radio - Since Nov, 1996
1996 - 2026 © Carlos Eduardo Lazarini da Fonseca