Tube-number record
RL40A
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BrandTESLA
ClassOutput Pentode
Base8-pin
Filament12.6 V @ 765 mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Warm-up Time3s
Heater NotesIndirectly heated oxide cathode
Absolute Maximum Ratings
Plate Voltage1000 V
Plate Dissipation40 W
Grid 2 Voltage250 V
Grid 1 Voltage-300 V
Cathode Current230 mA
H-C Voltage200 V
Audio Performance
Key Features
- High frequency use up to 120 Mc/s
- Used as RF amplifier, oscillator, or frequency multiplier
- Used in pulse operation and sawtooth generators
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode | 1000 V | 5000 | — | — | 70 mA |
| RF Amplifier Class B | 1000 V | — | — | — | 120 mA |
Application Notes
The RL40A tube is a power pentode with a maximum plate dissipation of 40W. It is designed to be inserted into a special shield that is part of the socket during operation.
Datasheets
Datasheet: RL40A.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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