Lord help me I just bought another friggin' power supply - an HP 6228B showed up on eBuy and like a fish to a lure I bit.
It looks to be in decent shape and is fully shod. Should be here in about a week.
-Pat
That is a nice power supply. Congrats to your new member in your (constantly growing?) PSU family.
I have a diy power supply, based on an article in the German electronics journal elrad from Nov. 1985.
It has two channels (+/- 50V, 2.5A per channel) but it is suffering from oscillations, when the CC mode kicks in beyond 600mA.
This weekend I'm attacking the oscillation by applying some ferrite beads to the base of T2/3 T102/103 and some
Miller caps (1nF @ T1/101, T4/104). Also increasing 4 feedback capacitors of four OpAmps (LM324N) from 470pF to 10.47nF
(C3/4 and C103/104). I hope, this will calm down this otherwise very nice linear power supply.
Ah, and adding some LED illumination for the meters.
I've linked in below the complete article, including schematics, layout and parts list, if you want to have a closer look.
https://elektronik-bastelei.de/schematics/1185/Doppelnetzteil_gesamt.pdf