Quote Originally Posted by dthp View Post
My mistake, it's 70 cm long, corrected in my previous post (I definitly have to read my posts before sending them).

I soldered a spare 330uF elna silmic II 25V ( but 16V will be fine), soldered directly the first reg pin and ground of the output cap. I must confess I'm not sure it is the root cause of the problem, as I am not a electronics expert, but adding this cap solved the problem for me.
As I have no 330uF caps I've just applied 220uF 25V caps to both 5V and 12V regs because applying to just either one did not removed noise enough.

Now the 964Hz noise is nearly completely removed as also can be seen on this recording of pink noise I've made after applying the caps.



Now I would be really interested if people with Gator and Murata regs with default caiman power supply have the same issue as I had

Photo with caps on Muratas installed:


One thing telling me that this is just a workaround and not really solved is that now when listening to headphones with volume know on VERY low level i can hear quite loud high frequency tone in headphones. But i'm not listening to headphones on such very low volume levels, so not a big deal for me.