LM317/337 load regulation and ripple

[ticknpop]

Why don’t you use a couple of ohms between each of the input filter caps CRCRC

 

[bansuri]

Schottky SB5100

also good 100n in parallel with the big caps. Placement close to rectifier


what is the application of this supply?

 

[cinhcet]

I'm attaching here the board with changes and some pictures.
Of course the board can be improved even more.

Wow, thanks a lot for your effort! Very insightful.

Before I will make new boards, I want to understand the following: The first attachment shows the two rails when the main's earth is connected to the ground of the circuit.
The second one shows without the earth connection.
Is this just a sensing artifact, since the oscilloscope ground leads are also connected to main's earth?

Schottky SB5100
also good 100n in parallel with the big caps. Placement close to rectifier
what is the application of this supply?

I can test adding some 100n caps.

Application is an analog synth.