1966 Voltage Regulators?

I have had good luck with Marlin P Jones. A quick check shows most of their supplies out of stock, at the moment. My 0-30V, 3A supply is 15 years old, works great. Adjustable current is a big help, it will hold that current with a short. I use it when checking wiring and electronics instead of battery. If I were to buy another, would get 10A unit. For large currents I use 20A 13.8V fixed supply for ignition and EFI development work.