Adjustable symetrical supply with LM317/337 (optimized)

Project16

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Hello everyone!

This diagram comes from an old French magazine and works very well. This power supply is adjustable and more efficient with only regulators (LM317 / 337) in terms of ripple rejection.
I propose the necessary for its implementation.

PS: the heatsinks on the photo are too big! :D

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Regard's!
 

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