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I don't recommend running a vibrator unless there is no alternative. They are noisy, of limited life, and hard to obtain.
Ripping out the transformer is an option, of course, but supplying AC to it is another. You would need a square wave power oscillator set to the frequency of design of the current power transformer.
My own solution would be to run the heaters from a filament transformer and build a little DC supply for the plates. There isn't much power involved so the whole thing wouldn't be very big.
I would, however, fix that dial so you can read it.
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