Hi RayRay,
Thanks for your remarks :-)
I Know its a old power supply, about 53 years...
And the age of course is the reason i can't find a schematic, and its a little obscure unit.
Harrison is the brand that designed the schematic that almost all brand use if they design a good benchtop power supply.
I payd 15$ for this power supply and a manual with the shipping cost is between 30 and 50$ to send it to the Netherlands, no way that i pay this amound of money, i'am old but not stupid.

The power supply is now in working condition afther a good cleanup and on a Dutch Forum i wanted to explane the schematic of this unit, just fore fun.
Kind regarts,
Bram