Tube-number record
1749S
0 archive entries
1749S is a tube type in the TubeDatabase archive (class: rectifier). Recorded specifications: brand Tesla, construction Other / special, socket Special / none, and maximum plate voltage 540 V. The archive does not yet hold a photographed example of this type.
BrandTesla
Classrectifier
BaseSpecial / none
Construction
Primary TypeOther / special
Rectifier TypeMercury vapor
EnvelopeGlass
Filament / Heater
Warm-up Time60s
Absolute Maximum Ratings
Plate Voltage540 V
Audio Performance
Key Features
- Mercury vapor (Hg)
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| — | 40 V | — | — | — | 25000 mA |
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