Thanks for your good advices, Dan . I'm a newbie in electronics and it could be very usefull for me, even if I already thought about to separate usefull signal and power which would be hand-wired for more security and fiability (perhaps I'm wrong)...
For hummings, I just know the basic tips, and I think learning "on the fly" would be the best recorded lessons ... if I'm still alive ;-) Thanks again, Phil --- In [email protected], Dan Andersson <d...@...> wrote: > > > Phil, > > Ensure that you are using FR4 laminate or better. The cheaper Phenol laminates > can easily "carbonise" if you have a single arc over. You get micro thin > carbon tracks on the laminate between your copper and it is very difficult to > find and repair. The only way I found to repair these hairline carbonised > cracks is to drill holes in the to break up the carbon tracks. > > Also, separate the PSU and the amp. I managed to suppress a lot of 50/100Hz > humming by using toroidal transformers. > > Also, try finding the thickest possible FR4. That will reduce microphonic > effects from the amplifier. > > //Dan > >
