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Probably no need to open the vibrator at this stage, as the radio probably has low time on it. However there is one component that will definitely need replacing once you get the vibrator running. That's the Buffer Capacitor. It's connected directly across the secondary of the transformer. Its purpose is to prevent arcing/pitting of the vibtr contacts. Back in the day we always changed the Buffer out of hand with every vibtr replacement. And it's guaranteed to be leaky after decades sitting. Not sure what value yours is, but it'll be rated at 1600V or higher.
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