Lots of noise when inputs are connected

[Thoru]

Hi,

Some time ago I build a Slone figure 11.4 amp. Finally I managed to get rid of at least some part of the noise/hum I got. This will likely need some improvements in the future, but I'm allready very happy. My problem now is that I only get hardly audible noise when I short the input to signal ground. When I connect my function generator, I get some hum, when I connect my mixing console I get lots of white noise and when I connect a CD-player, I get not only a lot of white noise, but also very loud plops! These plops repeat half a second or so, but seem to be random in timing.
Where is that noise coming from and how can I fix it?

Thanks for any help,

Remco Poelstra

 

[lineup]

hi

We have several Slone Fig 11.4 topics going

The most frequented, and where they should know about this amp
is
Randy Slone's "Fig 11.4" (Self's "Blameless"?): PCB layout
but we have also this:
Slone 11.4 questions...

I am sure you did a SEARCH before posting.
But is not always easy to find.

Good Luck!
lineup