Hi Mike
Once I have experienced a small arc between
a shaft of a load VVC and its support hardware
in my 50MHz hb amp.
I have used a flange of its stator for a high-side
(signal side) and a bellows/shaft side for ground.
The flange near the shaft had been connected
to the nearest chassi by 2-inch wide copper band
but the arc have occurred around the shaft;
so I have added another grounding way; and
achieved no arc with 10% more output power.
I prefer the shaft side to connect the ground,
and a stator to high-side to avoid any trouble
such as stray caps, mechanical strength, arc etc.
de Han JE1BMJ
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