ManFromGlass wrote:One of the joys of the English language!
I have the ART Tube Pac. I can see 1 small tube through a little window. It says - Warning do not open, shock hazard. It has a proper mains cable, no wall wart. It could be 20 years old. It’s a half rack unit, quite solid and would do some damage falling from a modest height.
I better look into the Craig vs WD40 a bit more before proceeding.
All bets are off WRT it's HT voltage then until someone can find a schematic...
But, this review by Paul White says "As far as I can tell, this unit uses the same low‑voltage tube circuitry as its predecessors," https://www.soundonsound.com/reviews/art-tube-pac-tube-eq