Here some photos of another mercury vapour power supply.
The owner of the differential 10Y line stage asked for a power supply with mercury vapour tubes since he loves the sound and blue glow of these.
And this is the result.
A new power supply with 4 816 mercury rectifier tubes.
Contrary to previous power supplies with MV tubes this one has a pure mercury vapour rectifier bridge, not a hydrid with 2 6AX4 TV dampers.
That's why the power supply has two separate switches for filaments and pate voltage, to allow for the necessary warm up of the 816 filaments.
View from the top with just the filaments turned on:
And with the pate voltage: