Before revision: Heater supplies are required for the cathodes Beside the investment cost, the share of the power budget that goes into heating the cathode without contributing to output can range from few percent points of anode dissipation (in high power applications at full output), to broadly comparable to anode dissipation in small signal applications.
After revision: ,,Heater supplies are required for the cathodes Beside the investment cost, the share of the power budget that goes into heating the cathode without contributing to output can range from few percent points of anode dissipation (in high power applications at full output), to broadly comparable to anode dissipation in small signal applications.