I am considering buying a A-199 Spring Reverb module and put it into a A-100 Mini Case. Of course, the Spring Tank would be outside of the box but I am worried about the hum noise considering what the manual says:
As the hum noise is mainly caused by the magnetic
field of the power supply transformer we recommend
the usage of the special A-100 power supply with ring
core transformer (A-100PSU2) instead of the standard
power supply (A-100NT12) for all A-100 systems that
include an A-199 module.
I don't know if the power supply version 3 is the right choice for it.
Here is a picture:
Thank you so much in advance.
Alex