41
0 Tubes in archive
BrandRCA
ClassPower-Amplifier Pentode
BaseMedium 6-Pin
Filament6.3V @ 400mA
Construction
Primary Typepentode
EnvelopeST-12
Sectionssingle
Filament / Heater
Heater NotesA. C. or D. C.
Absolute Maximum Ratings
Plate Voltage250 V
Grid 2 Voltage250 V
Audio Performance
Typical THD10%
Power Output3.4 W
Key Features
- Heater-cathode type
- Audio-output stage use
- Large power output
- Low input-signal voltage requirement
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Single Tube Operation (100V) | 100V | 1450 | 103500 | 150 | 9mA |
| Single Tube Operation (135V) | 135V | 1600 | 94000 | 150 | 12.5mA |
| Single Tube Operation (180V) | 180V | 1850 | 81000 | 150 | 18.5mA |
| Single Tube Operation (250V) | 250V | 2200 | 68000 | 150 | 32mA |
Application Notes
The 41 may be used singly or in push-pull. More than one audio stage preceding the 41 is undesirable due to microphonic disturbances. In push-pull, self-bias resistor should be half the value of a single stage. Transformer or impedance coupling is recommended.
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