[Amps] rf choke on output

[Peter Chadwick]

One function is to stop the pi tank components floating up towards the HV supply if there is no dc connection to ground. If you put two capacitors in series, then applying DC will lead to the junction floating to a voltage determined by the capacitance ratio. This can give problems if the antenna has no DC connection e.g. a dipole: you could get flashover in the loading capacitor.
73
Peter G3RZP