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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
1AF55 61.50 19HAMPL Mut.Cond. 500. Pent. Section
1B37 11.10 0ERECT. STD. Shorts on 3,4, and 5. See note A. OK over 300. See note D.
1B3 / 80167 11.10 0ERECT. STD. OK over 300. See note D.
1B42 5218 29AAMPL Mut.Cond.640.
1B4P2 5218 29AAMPL
1B512 320 0CDIODE
1B510 820 0CDIODE
1B57 8260 23CAMPL Mut.Cond.475. OK over 380
1B5 / 25S12 320 0CDIODE
1B5 / 25S10 820 0CDIODE
1B5 / 25S7 8260 23CAMPL OK over 380
1B712 71.560 38EAMPL Mut.Cond.300. Osc.Sect. OK over 240 on 3000 scale..
1B77 71.532 20EAMPL Mut.Cond.800. Pent.Section.
1C1 52.540 0ARECT. STD.
1C4 52.540 0ARECT. STD.
1C2110 200 0EDIODE Meter indication is optained when FIL control is switched to 50. See note D.
1C58 51.555 36EAMPL Mut.Cond.1550. See note E.
1C69 7260 41CAMPL Mut.Cond.300. Osc.Sect. OK over 240 on 3000 scale. See note D.
1C61 5220 24CAMPL Mut.Cond.650. See note D.
1C712 7260 41EAMPL Mut.Cond.300. Osc.Sect. OK over 240 on 3000 scale. See note D.
1C72 5220 24EAMPL Mut.Cond.650. See note D.
1D5G2 5227 24EAMPL Mut.Cond. 750.
1D5GP2 5227 24EAMPL
1D7G12 7260 35EAMPL Mut.Cond.200. OK over 160. See note D.
1D7G2 520 29EAMPL Mut.Cond.750. See note D.
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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