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Help with how this PSU works. (With revised design)

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xavier60:
In this example, D6 mainly  prevents the output transistors' B-E junctions from being reversed biased if an external source is connected while the PSU is not being powered. https://www.eevblog.com/forum/projects/linear-lab-power-supply/?action=dlattach;attach=751023

Evangelopoulos Panagiotis:
Oh ok now I get it. I shall change the D10s position then.

xavier60:
Your design's topology has been around since the sixties.
This is a useful reference, https://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1962-07.pdf
Back in those days, the germanium power transistors were just about all PNP, explaining why the pass transistors are in the negative rail.
The design I linked in my previous post has comparable performance, but does not need auxiliary control rails.

Evangelopoulos Panagiotis:
So am I good to go? Any feedback on the other questions I asked?

xavier60:

--- Quote from: Evangelopoulos Panagiotis on May 12, 2020, 10:35:34 pm ---So am I good to go? Any feedback on the other questions I asked?

--- End quote ---
About the Pot I can't say until the other problems are corrected in the schematic.

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