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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
E90Z3 56.335 0KRECT. STD. Plate No. 1. See note D.
EAA901S4 26.360 0KDIODE Shorts on 2 and 3.
EAA901S9 26.360 0KDIODE Shorts on 2 and 3.
EAA919 26.360 0KDIODE Shorts on 2 and 3.
EAA914 26.360 0KDIODE Shorts on 2 and 3.
EC902 96.367 20LAMPL Mut.Cond.2200. See note D.
ECC801S4 212.615 25EAMPL Use adapter #6 for triode #2.
ECC801S4 212.615 25EAMPL Use adapter #5 for triode #1.
ECC802S4 212.660 25EAMPL Use adapter #6 for triode #2.
ECC802S4 212.660 25EAMPL Use adapter #5 for triode #1.
ECC9111 86.369 11KAMPL Mut.Cond.5000. See note D.
ECC911 26.369 11KAMPL Mut.Cond.5000. See note D.
EL1C1 52.540 0ARECT. STD.
EL1C4 52.540 0ARECT. STD.
FM100010 106.353 10FAMPL Mut.Cond.1500. Grid 2.
FM10003 66.353 10FAMPL Mut.Cond.1500. Grid 1.
G2S5 12.525 0BRECT. STD. Plate Number 2.
G2S7 72.525 0BRECT. STD. Plate Number 1.
G4S5 12.525 0BRECT. STD. Plate Number 2.
G4S7 72.525 0BRECT. STD. Plate Number 1.
G842 72.540 0ARECT. STD.
GA1 5560 16?AMPL Mut.Cond.2000.
GU12 (Brit.)7 12.540 0ARECT. STD. See notes A and D.
H2-107 12.50 0ARECT. STD. OK over 1000. See notes A and D.
HA29 76.359 18MAMPL Mut.Cond.1900. 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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