Power supply issue?

[BoneMusic]

PSU startup problems

At http://musicfromouterspace.com/analogsynth_new/WALLWARTSUPPLY/WALLWARTSUPPLY.php, Ray Wilson wrote: Diodes CR3, CR4 and CR5, CR6 are protection diodes recommended in National Semiconductor Application Note AN-182 for protecting three terminal regulators from unwanted current paths that the output capacitors can inadvertently cause under certain conditions. So I took a look at AN-182 (this version’s revised 2013, after Wilson wrote the above apparently). It does talk about two diodes per r…

Analog output did a nice job figuring out that the positive regulator needs to be clamped with a schottky diode otherwise can be pulled negative and fail to start