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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
38568K11 56.363 9EAMPL Mut.Cond.2400. See note D.
38568K8 56.341 9EAMPL Mut.Cond.1000. See note D.
385933 7540 0ARECT. STD. See note D.
385932 7540 0ARECT. STD. See note D.
3861612 56.353 10DAMPL Mut.Cond.1500.
386161 56.353 10DAMPL Mut.Cond.1500.
3861710 66.360 25DAMPL Mut.Cond.400. OK over 320. See note D.
386177 66.341 18DAMPL Mut.Cond.1000. See note D.
3862710 36.30 0DDIODE
3862710 66.30 0DDIODE
386277 66.341 25DAMPL Mut.Cond.1000.
386361 76.349 17CAMPL Mut.Cond.1225.
386461 76.356 17CAMPL Mut.Cond.1600.
3865512 26.30 0CAMPL Eye closed.
3865512 36.30 0CAMPL Eye open.
3866710 66.360 23DAMPL Mut.Cond.450. OK over 360.
386677 66.345 23DAMPL Mut.Cond.1100.
38717E8 8245 17EAMPL Mut.Cond.1150.
38717E11 6245 17EAMPL Mut.Cond.1150.
38765J7 56.360 24EAMPL Mut.Cond.2000.
38766Y8 56.360 42EAMPL Set MICROMHOS switch at 6000.
38768F11 76.360 13EAMPL Mut.Cond.2000. Plate No. 2.
38768F8 76.360 13EAMPL Mut.Cond.2000. Plate No. 1.
3880712 16.370 27BAMPL Mut.Cond. 3500. Connect plate to top left contact of 6 pin socket.
3883710 312.671 0DAMPL 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.

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Last modified: Jun 5, 2026 20:40
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