Tube-number record
TUBE TESTER I-177
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BrandWar Department
ClassVacuum Tube Tester
BaseOctal
Filament105 V @ — mA
Construction
EnvelopeWooden or Metal case
Filament / Heater
Heater NotesOperation on 105- to 125-volt, 60-cycle alternating current. Some models support 210- to 260-volt operation.
Absolute Maximum Ratings
Audio Performance
Key Features
- Shorts Test
- Gas Test
- Dynamic Mutual Conductance Measurement
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Tube Test | — | 15000 | — | — | — |
Application Notes
The instrument is used for determining the condition of vacuum tubes. It features a SHORTS indicator and specific GAS NO. 1 and GAS NO. 2 test buttons for detecting grid gas.
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