David Toepfer ) writes:

Any help with suggesting a good kW linear that would preserve a
hi-fidelity signal would be appreciated as well.

It was before my time, but I don't think anyone used linears much
for AM. Yes, it could be done, but I don't think it was done much.

What they'd do is take the exciter, and put it in CW mode (maybe pulling
the modulator tubes to decrease current drain and strain on the power
supply) and feed it into a high level stage that was plate modulated.
And of course, there was a really hefty plate modulator to go with it.

Michael VE2BVW