A Regulated Isolated 9vdc Power Supply Layout

[djmiyta]

Yup the design with that decade ladder was for ultra-sensitive digital hardware that went in an airplane, so it was running off 28V aircraft power which can be a bit unpredictable for noise. In a pedal power supply it would be absolute overkill and you likely wouldn't hear much of a difference. 100nF on each IC input (not just one at the beginning before it splits) is a good idea though.

Like this or...? if it's correct anything else to add for good measure, good practice or in general? anything you would change?

 

[Tassieviking]

There is no point in using that 1N5817 diode on the input, it is only rated at 1 amp and you have a 5 amp supply feeding it.
you need a diode that can handle at least 5 amps or use a mosfet as a diode, the mosfet will have less voltage drop across it.