Tube-number record
PL 508
0 archive entries
PL 508 is a tube type in the TubeDatabase archive (class: Power Pentode). Recorded specifications: brand Mazda Belvu, year 1968, construction Pentode, base Glass, socket Magnoval, maximum plate voltage 400 V, and maximum plate dissipation 12 W. The archive does not yet hold a photographed example of this type.
BrandMazda Belvu
ClassPower Pentode
BaseMagnoval
Filament18.5 V @ 300 mA
Construction
Primary TypePentode
EnvelopeT9
Base MaterialGlass
Sections1
Filament / Heater
Heater NotesSeries supply
Absolute Maximum Ratings
Plate Voltage400 V
Plate Dissipation12 W
Grid 2 Voltage275 V
Cathode Current100 mA
H-C Voltage220 V
Audio Performance
Key Features
- Indirect heating
- TV Sweep amplifier
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Nominal (Pulsed) | 190 V | — | — | — | 60 mA |
| End of Scan (Peak) | 70 V | — | — | — | 230 mA |
Application Notes
Specifically designed for TV color vertical or horizontal scanning circuits.
0 results