Vacuum Tube Data Sheets

6CA7 / EL34

TENTATIVE DATA
Class AB2 Audio Amplifier
Distributed Load Connection
Maximum Ratings (Design Center Values)
   Plate and Grid No. 2 Supply Voltage 500 V
   Plate Dissipation 25 W
   Grid No. 2 Dissipation 8 W
   Cathode Current 150mA
   Grid Current Starting Point - Grid No. 1 Voltage when
      Grid No. 1 Current is 0.3 uA -1.3 V
Grid No. 1 Circuit Resistance 500 K ohm
External Resistance Between Heater and Cathode 20 K ohm
Voltage Between Heater and Cathode 100 V
Typical Operation (Fixed Bias - Two Tubes Push Pull)
   Plate Supply Voltage 500 V
   Grid No. 2 Supply Voltage (See Note1)
   Grid No. 1 Bias (approx.) -44.5 V
   Plate to Plate Load Resistance 7000 ohm
   Plate and Grid No. 2 Current (Zero Signal) 2 x 57 mA
   Plate and Grid No. 2 Current (Max Signal) 2 x 112 mA
   Input Signal Voltage (rms) 32 V
   Power Output 60 W
   Harmonic Distortion 2.5 %
Note 1:
   Screen voltage is obtained from taps located at 43% of the plate winding turns.
   An unbypassed resistor of 1 K ohm in series with each screen grid is necessary
   to prevent screen overload.

el34 vacuum tube specifications

Vacuum Tube Data Sheets

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