I have build 3 W492 units, with SSL9k PSU.
When the machines are cold and i turn on i have no signal out(audio), the +15V is missing (on the PSU). I have to turn off and on, and the +15V come and everything work ok.
I tried to deconnect the W492 PCB, and the +15V on the PSU board is ok, no need to turn off and on. It same on 3 unit.
I had some issues with LM78xx and LM79xx regs a while ago.Have you tried to exchange it to a new one?
Mine tended to do the same as yours,and after I used better regs (just a little more expensive-no no-names!) the issues were gone.
Personally I do not use those regs when ever possible and go the LM317 and 337 route.....just a thought.
[/quote]My transformer is 25VA, my EQ with true bypass consume less than 200mA, so it's more than enough
Does anyone had the same problems?
Current consuption of about 200mas seems a bit high to me,as far as I can remember there are 8 pieces of NE5532 on the board,right?
If so then look at the data:8 x 6mAs (typical current)=48mAs,max. is 8 x 16mAs(max.supply current)=128 mAs.
I am not sure if there are other active/current-eating parts on board......
Maybe I am wrong with this but it seems pretty high for this circuit (did you mean a single board?).....
Anyway-try to swap the 7815 to a well-known brand because it is just some cents of your money.