Tube-number record
AC/SP 3
0 archive entries
AC/SP 3 is a tube type in the TubeDatabase archive (class: Pentode). Recorded specifications: brand Ediswan, construction Pentode, socket 7-pin (non-miniature), and maximum plate voltage 250 V. The archive does not yet hold a photographed example of this type.
BrandEdiswan
ClassPentode
Base7-pin (non-miniature)
Filament4 V @ 1 mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage250 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF/IF Stage 1 | 250 V | 7000 | 550000 | — | 7.8 mA |
| RF/IF Stage 2 | 250 V | 7000 | 550000 | — | 7.9 mA |
| Video Output 1 | 250 V | 7450 | 400000 | — | 10.5 mA |
Application Notes
Equally suitable for use in radio frequency, I.F. and video frequency stages. In video stages, it can develop sufficient voltage swing to modulate a cathode ray tube. For video stages between 160-200V screen voltage, anode current should not exceed 14 mA.
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