Vh | Voltage applied to heater. |
Ah | Current rating of heater measured in Amps. |
Va | Voltage applied to anode. Referenced to cathode regarded as at 0V. |
Vs | Voltage applied to screen grid. With respect to cathode. |
Vg | Voltage applied to control grid. With respect to cathode. |
Vosc | Voltage applied to second control grid in frequency changers. |
mAa | Current rating of anode circuit measured in milliamps. 1000mA = 1A. |
mAs | Current rating of screen grid. |
mAg | Current rating of control grid. This is normally very low. |
ra | Anode AC resistance. |
gm | Mutual conductance. The change of mA of anode current that flows for a 1 volt alteration in g1 volts. |
rk | Value of cathode bias resistor. |
rl | Optimum output load resistance. |
Pdriv | The input power in Watts required to drive the valve to maximum output. |
Pout | The number of Watts of output power. |
Pdiss | The power in Watts that the anode can dissipate. |
D | Percentage distortion of amplified signal. Audio output valves. |
freq | The highest frequency in MHz that can be used at maximum output. |
f.max | The highest frequency in MHz at which that the valve will produce useful power. |