Tube-number record
HIGH-MU TRIODE—SHARP-CUTOFF PENTODE
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HIGH-MU TRIODE—SHARP-CUTOFF PENTODE is a tube type in the TubeDatabase archive (class: Voltage Amplifier and Video Output Tube). Recorded specifications: brand RCA, year 1966, construction Multi-section, base Small Button Noval 9-Pin (JEDEC No. E9-I), socket Noval (B9A), maximum plate voltage 300 V, and maximum plate dissipation 5 W. The archive does not yet hold a photographed example of this type.
BrandRCA
ClassVoltage Amplifier and Video Output Tube
BaseNoval (B9A)
Filament6.3 V @ 775 mA
Construction
Primary TypeMulti-section
EnvelopeT6-1/2
Base MaterialSmall Button Noval 9-Pin (JEDEC No. E9-I)
Sections2
Filament / Heater
Heater NotesPeak heater-cathode voltage: 200V (either polarity). The DC component must not exceed 100V.
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation5 W
Grid 2 Voltage300 V
H-C Voltage200 V
Audio Performance
Key Features
- 9-Pin Miniature Type
- Frame-Grid Construction
- Sharp-Cutoff Pentode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Unit | 125 V | 4000 | 17500 | 70 | 8.4 mA |
| Pentode Unit (Operation 1) | 200 V | 21000 | 55000 | — | 16.5 mA |
| Pentode Unit (Operation 2) | 200 V | 23000 | 75000 | — | 20 mA |
Application Notes
Specifically designed for use as a combined voltage amplifier and video output tube in television receivers.
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