Tube-number record
TP26
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TP26 is a tube type in the TubeDatabase archive (class: Triode-Pentode Frequency Changer). Recorded specifications: brand Mazda / Ediswan, construction Multi-section, socket Octal, and maximum plate voltage 150 V. The archive does not yet hold a photographed example of this type.
BrandMazda / Ediswan
ClassTriode-Pentode Frequency Changer
BaseOctal
Construction
Primary TypeMulti-section
EnvelopeMetallised
Sections2
Filament / Heater
MaterialBattery
Absolute Maximum Ratings
Plate Voltage150 V
Grid 2 Voltage150 V
Audio Performance
Typical THD5%
Key Features
- Economy Triode Pentode
- Self-oscillating frequency changer
- High signal-to-noise ratio
- Metallised bulb
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode Section (Static) | 120 V | 1550 | — | — | — |
| Triode Section (Static) | 100 V | 1300 | 21500 | 28 | — |
| Frequency Changer (HT 120V) | 103 V | 550 | — | — | 1.2 mA |
Application Notes
Designed for operation on medium and long wave bands only. Cathode injection enables high conversion conductance with low feed currents. Recommended to decouple anode and screen of pentode to negative end of filament.
Datasheets
Datasheet: TP26.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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