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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
62023 56.333 0KRECT. STD. Plate No.1.
62651 96.360 12KAMPL Mut.Cond.2000.
64/64A7 66.342 26BAMPL Mut.Cond.1050.
64857 96.368 15KAMPL Mut.Cond.5000.
65/65A7 66.341 23BAMPL Mut.Cond.1000.
66264 400 0HGAS No. 1 OK over 200. Shorts on 4 and 5. See note D.
66274 4030 0HGAS No. 1 OK over 200. Shorts on 4 and 5. See note D.
66607 96.370 0KAMPL Mut.Cond.4300.
66611 96.360 12AAMPL Mut.Cond.2000.
66627 96.370 10KAMPL Mut.Cond.3800.
66634 26.360 0KDIODE Shorts on 2 and 3.
66639 26.360 0KDIODE Shorts on 2 and 3.
666411 96.370 8KAMPL Mut.Cond.4000.
66698 56.370 17LAMPL Mut.Cond.3700.
66704 212.660 25EAMPL Use adapter #6 for triode #2.
66704 212.660 25EAMPL Use adapter #5 for triode #1.
66714 212.615 25EAMPL Use adapter #6 for triode #2.
66714 212.615 25EAMPL Use adapter #5 for triode #1.
66761 96.362 18KAMPL Mut.Cond.2200.
66794 212.615 25EAMPL Use adapter #6 for triode #2.
66794 212.615 25EAMPL Use adapter #5 for triode #1.
66804 212.660 25EAMPL Use adapter #6 for triode #2.
66804 212.660 25EAMPL Use adapter #5 for triode #1.
67/67A1 66.340 34BAMPL Mut.Cond.1000.
68/68A7 66.341 32BAMPL Mut.Cond.1050.
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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