i love the hp 6525A that we have at work
it's such a... Thing
weird box with dials on it on the bench with a couple wires sticking out
ridiculously heavy
makes a continuous ticking noise when plugged in (if the dials are set to anything other than 0000)
still works perfectly (if a bit out of calibration) when it's about 60 years old
they don't make things like that anymore
-F
it's a high voltage power supply, 4 kV/50 mA (max of 2 kV from ground, but the output is floating so you can do ±2 kV for a total of 4), and it's from an era where they advertised it being fully solid-state as a big selling point
and honestly that is a big selling point now, too; getting old equipment that uses tubes is always a pain because sometimes the tubes need replacing and sometimes they're ones that you can't get anymore
would love to have the schematics for it
-F
actually, would anyone happen to be good at digging up old manuals? i feel like this one would be a fascinating one to go through but our attempts have so far been stymied by the fact that modern HP has reused the number for a printer
-F
i wonder if we could just ask Keysight (the modern company that is what remains of HP's test equipment department)
they might not still have it, but they also might
-F