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 windingturns. An unbypassed resistor of 1 K ohm in series with each screen grid isnecessary to prevent screen overload. |