Tube-number record
KT90
0 archive entries
ClassAudio Power Pentode
BaseOctal
Filament6.3 V @ 1.6 mA
Construction
Primary TypeBeam tetrode / beam power
EnvelopeGlass
Base MaterialOctal, 8 pins
SectionsSingle
Filament / Heater
Heater Notes+/- 0.6 Volts AC or DC
Absolute Maximum Ratings
Plate Voltage750 V
Plate Dissipation50 W
Grid 2 Voltage650 V
Grid 1 Voltage-200 V
Cathode Current230 mA
H-C Voltage300 V
Audio Performance
Power Output160 W
Key Features
- Anode dissipation 50W
- 110W output per pair in push-pull at 550V
- 160W output per pair at 750V anode / 600V screen
- Recommended replacement for 6550, 6550A and KT88
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode Connection 1 | 250 V | 14000 | 11000 | — | 145 mA |
| Pentode Connection 2 | 400 V | 8800 | 25000 | — | 90 mA |
| Triode Connection | 250 V | 15000 | 650 | 9 | 153 mA |
Application Notes
Primarily designed for use in audio frequency power amplifier applications.
Datasheets
Datasheet: KT90.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
0 results