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I-177 Tube Tester




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
698 66.30 19BAMPL Mut.Cond.500. No. 2. Grid.
698 86.30 19BAMPL Mut.Cond.500. No. 1. Grid.
6A32 106.367 55AAMPL Mut.Cond.3000.
6A41 56.360 23BAMPL Mut.Cond.3000.
6A4/LA1 56.360 23BAMPL Mut.Cont.3000.
6A5G7 56.367 55EAMPL Mut.Cond.3000. Shorts on 4 and 5
6A612 56.353 10DAMPL Mut.Cond.1500.
6A61 56.353 10DAMPL Mut.Cond.1500.
6A710 66.360 25DAMPL Mut.Cond.400. OK over 320. See note D.
6A77 66.341 18DAMPL Mut.Cond.1000. See note D.
6A812 76.360 30EAMPL Mut.Cond.300. OK over 240. See note D.
6A87 76.341 18EAMPL Mut.Cond.1000. See note D.
6AB411 96.370 8KAMPL Mut.Cond.4000.
6AB512 26.30 0CAMPL Eye closed.
6AB512 36.30 0CAMPL Eye open.
6AB68 56.353 0EAMPL Mut.Cond.1450.
6AB74 26.369 8EAMPL Mut.Cond.3500.
6AC58 56.340 0EAMPL Mut.Cond.1000.
6AC68 56.363 0EAMPL Mut.Cond.2400.
6AC74 26.371 10EAMPL Mut.Cond.3500.
6AD57 56.343 10EAMPL Mut.Cond.1000.
6AD63 86.30 0EAMPL Eye no.2 open. Eye No.1 closed.
6AD62 86.30 0EAMPL Eye No.1 open. Eye No.2 closed.
6AD75 56.360 65EDIODE Mut.Cond.325. OK over 260.
6AD78 56.360 24EAMPL Mut.Cond.2000.
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
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