Quote Originally Posted by maniac View Post
Hi Anthony thank you!
I can see that you are using original module, just the headphone opamp replaced wit Burson. With this board and standard opamp I'm not hearing the background tone. I can hear it only with Gator module http://www.beresford.me/products/GatorEU.html .


I'll first try to measure voltage on regs as suggested by chrism then start to think about shortening power cable or adding 330uF cap to murata.
Sorry to appear to be clever but take care when touching the pins with the multimeter probes - don't short anything or you will be really cross with me!

I had a strange noise with my Caiman when changing PSU's as the voltage was not high enough into the 12v Murata (I only had about 13v in to it).

This is one of the reasons why I went for two PSU's and scrapped the internal regs completely but that's another story.

Regards