XF 184/3EI7
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BrandIBRAPE MINIWATT
ClassSharp-cutoff Pentode
BaseNoval
Filament3.6V @ 0.6mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Warm-up Time11s
Heater NotesIndirect heating AC or DC, series connection
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation2.5 W
Grid 2 Voltage250 V
Cathode Current25 mA
H-C Voltage150 V
Audio Performance
Key Features
- Frame grid (grade de quadro)
- Sharp-cutoff (corte agudo)
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF/IF Amplifier - Set 1 | 170V | 15600 | 330000 | 60 | 10mA |
| RF/IF Amplifier - Set 2 | 200V | 15000 | 380000 | 60 | 10mA |
| RF/IF Amplifier - Set 3 | 230V | 14400 | 450000 | 60 | 10mA |
Application Notes
Recommended for IF amplification in television receivers. Bias should be achieved via cathode resistor. Not recommended for circuits with automatic gain control (AGC) due to microphony and cross-modulation; variable transconductance types are preferred for AGC.
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