Tube-number record
429
0 archive entries
429 is a tube type in the TubeDatabase archive (class: Power Pentode). Recorded specifications: construction Pentode and maximum plate voltage 250 V. The archive does not yet hold a photographed example of this type.
ClassPower Pentode
Filament6.3 V @ 1.2 mA
Construction
Primary TypePentode
Filament / Heater
Absolute Maximum Ratings
Plate Voltage250 V
Grid 2 Voltage250 V
Audio Performance
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode | 250 V | 6500 | — | 4.5 | — |
Application Notes
Data extracted from French technical datasheet (FT) containing noisy OCR. Typical values for transconductance normalized from 6.5 mA/V to 6500 µmhos.
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