The choke must present a much higher impedance than the plate
impedance over a wide frequency range. A single solenoid that has
enough inductance at the low frequency end is going to have a lot of
self-capacitance and will wind up (no pun intended) with unwanted
resonances at some other frequency(ies) in the operating range. Above
any parallel resonance the reactance will go capacitive with
disastrous results.
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Suitability of any choke for this application can be readily checked (in
circuit )with a grid dipper ,which should NOT indicate resonance within any
of the used bands.

Frank GM0CSZ / KN6WH