Tube-number record
6.LD.20
0 archive entries
6.LD.20 is a tube type in the TubeDatabase archive (class: DOUBLE DIODE TRIODE). Recorded specifications: brand MAZDA, year 1948, construction Indirectly heated, base Standard, socket Rimlock, and maximum plate voltage 300 V. The archive does not yet hold a photographed example of this type.
BrandMAZDA
ClassDOUBLE DIODE TRIODE
BaseRimlock
Filament6.3 V @ 0.2 mA
Construction
Primary TypeIndirectly heated
EnvelopeGlass
Base MaterialStandard
SectionsDouble Diode Triode
Filament / Heater
Heater NotesIndirectly heated — for parallel operation
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Resistance Coupled Amplifier (1) | 260 V | — | 47000 | 19.5 | 2 mA |
| Resistance Coupled Amplifier (2) | 260 V | — | 100000 | 21.5 | 1.3 mA |
Application Notes
It is recommended that Diode 2 should be used for detection. Pin 1 should preferably be connected to earth potential.
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