Tube-number record
N3Z
0 archive entries
N3Z is a tube type in the TubeDatabase archive (class: Output Pentode). Recorded specifications: brand Marconi, year 1952, construction Pentode, socket Miniature 7-pin (B7G), maximum plate voltage 165 V, and maximum plate dissipation 9 W. The archive does not yet hold a photographed example of this type.
BrandMarconi
ClassOutput Pentode
BaseMiniature 7-pin (B7G)
Filament13 V @ 0.3 mA
Construction
Primary TypePentode
EnvelopeTubular
Sectionssingle
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage165 V
Plate Dissipation9 W
Grid 2 Voltage165 V
H-C Voltage150 V
Audio Performance
Typical THD10%
Power Output4.1 W
Key Features
- Miniature
- Low microphony
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Pentode Connection | 165 V | 9500 | 23200 | — | 53 mA |
| Triode Connection | 165 V | 12000 | 835 | 10 | — |
Application Notes
The maximum permissible D.C. resistance from control grid to cathode is limited to 0.27 Mohms for auto-bias and 0.1 Mohms for fixed bias. Bulb temperature should not exceed 250C.
0 results