Just to clarify, what a vibrator is is basically a solenoid reed switch, wired so that energizing the coil removes power from the coil as the NC contact is opened. This re-energizes the coil - rinse, repeat - at a reasonable frequency. Hence the name 'vibrator'. The input voltage is also connected to the NO contact such that while the coil is energized the voltage appears at the output of the vibrator, in the form of a DC square wave. This square wave is sufficient to energize a regular transformer (with a really big iron core to handle the square wave) and produce the required higher voltage at the output of the transformer. This is then smoothed, usually by a large power capacitor. At no time is there any AC voltage present, since the current flow never reverses. The DC square wave produced by the making and breaking of the vibrator contacts is sufficient to cause the varying magnetic flux in the transformer necessary to produce a higher voltage output. In effect, an electro-mechanical reasonably stable oscillator. My understanding is that if the unit was operating while the case was open, the buzz was quite annoying.
Don't mind me, I'm just an old coot with a lot of weird esoterica floating around inside my brain. Have fun play//// experimenting with your new equipment.