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The E34L is a power pentode designed for use in audio frequency power amplifiers. The E34L is similar to the EL34. It offers increased transconductance and higher perveance. This allows more power output, while maintaining low bias and drive requirements.
Heater voltage..........................6.3 ac or dc
Heater current..........................1.5 amps
Grid 1 to anode.........................1.1 pf
Grid 1 to H,K,G2,G3,A...................15.2 pf
Anode to H,K,G2,G3,G1...................8.4 pf
Mounting position.......................Any
Overall length..........................4.375" (max)
Seated height...........................3.75" (max)
Diameter................................1.25" (avg)
Base....................................Octal
Pin 1...Grid 3
Pin 2...Heater
Pin 3...Anode
Pin 4...Grid 2
Pin 5...Grid 1
Pin 6...No connection
Pin 7...Heater
Pin 8...Cathode
Anode voltage...........................850
Anode dissipation.......................25 watts
Grid 2 voltage..........................500
Grid 2 dissipation......................8 watts
Cathode current.........................150 milliamps
Heater to cathode.......................100 volts
Maximum grid 1 resistance...............270,000 ohms
Anode voltage...........................250
Grid 3 voltage..........................Connected to cathode
Grid 2 voltage..........................250
Grid 1 voltage..........................-12.2
Anode current...........................115 milliamps
Screen current..........................15.5 milliamps
Transconductance(Gm)....................13250 micromhos
Anode resistance........................10,000 ohms
Audio Frequency Power Amplifier Push-Pull Class AB1 Fixed Bias Values are for Two Tubes
Anode voltage...........................500
Grid 2 voltage..........................300
Grid 1 voltage..........................-30
Zero signal anode current...............80 milliamps
Maximum signal anode current............240 milliamps
Zero signal grid 2 current..............20 milliamps
Maximum signal grid 2 current...........52 milliamps
Peak grid 1 voltage.....................30
Zero signal anode dissipation...........40 watts
Maximum signal anode dissipation........40 watts
Maximum signal grid 2 input.............15 watts
Effective load..........................4,500 ohms
Power output............................80 watts
Mick Evans 1999-2001
Last updated 25 December 2000