Tube-number record
6BY8
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BrandSylvania
ClassSharp Cutoff Pentode and High Perveance Diode
BaseNoval (B9A)
Filament6.3 V @ 600 mA
Construction
Primary TypePentode
EnvelopeT5-1/2
Base MaterialGlass
SectionsDual
Filament / Heater
Warm-up Time11s
Heater NotesControlled heater warm-up time for series string operation.
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation3 W
Grid 2 Voltage300 V
Grid 1 Voltage-50 V
H-C Voltage200 V
Audio Performance
Key Features
- Sharp cutoff pentode
- High perveance diode
- Controlled heater warm-up
- Unipotential cathode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier (Condition 1) | 100 V | 3900 | 500000 | — | 5 mA |
| Class A1 Amplifier (Condition 2) | 250 V | 4500 | 1500000 | — | 7.6 mA |
| Class A1 Amplifier (Condition 3) | 250 V | 5200 | 1000000 | — |
Application Notes
The diode section is similar to one section of a 6AL5 and is intended for limiter or detector applications. The pentode section is similar to a 6AU6 and is intended for use as an rf or if amplifier.
Datasheets
Datasheet: 6BY8.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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