Tube-number record
2038 (GM)
0 archive entries
2038 (GM) is a tube type in the TubeDatabase archive (class: Triode Heptode Converter). Recorded specifications: brand Rogers Radio Tubes Limited, year 1939, construction Multi-section, base Small octal shell, socket Octal, maximum plate voltage 250 V, and maximum plate dissipation 2.5 W. The archive does not yet hold a photographed example of this type.
BrandRogers Radio Tubes Limited
ClassTriode Heptode Converter
BaseOctal
Filament20 V @ 150 mA
Construction
Primary TypeMulti-section
EnvelopeST12 - Metal spray
Base MaterialSmall octal shell
Sections2
Filament / Heater
Heater NotesUnipotential cathode
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Converter Service (Column 1) | 100 V | 520 | — | — | 1.4 mA |
| Converter Service (Column 2) | 250 V | 240 | — | — | — |
| Oscillator Section | 250 V | 2300 | — | 15 | 8.5 mA |
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