Tube-number record
XF 184/3EI7
0 archive entries
XF 184/3EI7 is a tube type in the TubeDatabase archive (class: Sharp-cutoff Pentode). Recorded specifications: brand IBRAPE MINIWATT, construction Pentode, socket Noval (B9A), maximum plate voltage 250 V, and maximum plate dissipation 2.5 W. The archive does not yet hold a photographed example of this type.
BrandIBRAPE MINIWATT
ClassSharp-cutoff Pentode
BaseNoval (B9A)
Filament3.6 V @ 0.6 mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Warm-up Time11s
Heater NotesIndirect heating AC or DC, series connection
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF/IF Amplifier - Set 1 | 170 V | 15600 | 330000 | 60 | 10 mA |
| RF/IF Amplifier - Set 2 | 200 V | 15000 | 380000 | 60 | 10 mA |
| RF/IF Amplifier - Set 3 | 230 V | 14400 | 450000 | 60 | 10 mA |
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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