| 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. |
