rock soderstrom said:
@Ben: You are not alone! 8)
1RU panel, not tested!
https://pcbgrinder.com/download/FPD/SYM1RU.fpd
2RU, which I used for my builds.
https://pcbgrinder.com/download/FPD/Sym_FET2RU.fpd
Probably too late, but if its really the PSU making problems, it wold be great if someone would try measuring AC on the DC lines. Could possible be cleaned up with a well placed cap, instead of replacing the PSU.
I do have a unit within arms length at a local studio. The "problem" is, I dont have the noise, but I could try poking around, measuring AC, and see if I can make it go away if I find any.
A question
I used 4R7 resistors in the filter portion of the PSU, so thats less current draw. Could that affect the stability of the regulators? I have had regulator oscillation on some designs (VECA, check the errata), and simply correcting with the standard application note cap for stabilisation works like a charm.
Also, what have you guys been using for the dual FET?
Gustav