LS 30
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BrandTelefunken
ClassUKW-Triode
BaseLg.eNr. 1718 / 1728
Filament12.6V @ 285mA
Construction
Primary TypeTriode
EnvelopeGlass
Sections1
Filament / Heater
Heater NotesIndirectly heated oxide cathode; range 260-310 mA
Absolute Maximum Ratings
Plate Voltage700 V
Plate Dissipation32.5 W
Grid 1 Voltage-100 V
Cathode Current130 mA
H-C Voltage100 V
Audio Performance
Key Features
- UKW-Triode
- Indirekt geheizte Oxydkathode
- High transconductance
- Frequency dependent plate voltage ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Static Characteristics | 400V | 6250 | 4208 | 26.3 | 60mA |
| HF-Verstärkung (λ = 1.2m) | 700V | - | - | - | 100mA |
| Schwingbetrieb (λ = 53cm) | 400V | - | - | - | 100mA |
Application Notes
Specifically designed for decimeter wave applications. For minimized losses, it is recommended to mount contact springs directly onto circuit elements using socket type 1718.
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