Tube-number record
2HM5
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BrandWestinghouse
ClassSharp-Cutoff Triode
BaseMiniature 7-pin (B7G)
Filament2.4 V @ 0.6 mA
Construction
Primary TypeTriode
EnvelopeT-5 1/2
Sections1
Filament / Heater
Warm-up Time11s
Heater NotesSeries connected heater with controlled warm-up
Absolute Maximum Ratings
Plate Voltage200 V
Plate Dissipation2.2 W
Grid 1 Voltage-50 V
Cathode Current20 mA
H-C Voltage100 V
Audio Performance
Key Features
- Sharp-cutoff
- Controlled heater warm-up
- VHF TV tuner service
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF Amplifier | 135 V | 14500 | — | 70 | 12.5 mA |
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