Ok i was building a midibox sid just one with the older model chip.
Now i am using this scematic, the sid is working with the sidplayer on it but there is so mutch noize on the 50 Hz its unbeliveble there is almost no sound and a lot of noize but the osc seem to work.
I cant find this scematic anywhere anymore mabey it is wrong??? ???
I thought to have made all the proper ground connections ?
Thanks Guys
The pdf of the scematic used is attached with this message.
The sid was powered by 2 wallwarts but then i had a very nasty noize a loww buzz in the output, i thought it could be the psu’s, i optimised to the C64 psu sceme and now it still has it, is it possible that i have a ground loop somewhere…
Follow Wilba’s advice, and get a power conditioner instead of feeding junk power to your valuable equipment Some 50Hz hum is normal but it shouldn’t be that bad… There might be a ground loop there too.
oh yeah… you people have seen the connection diagram i used (attechment) i connected the SID and Core in this way but on the Ucaaps site i can find only different scematics…
is that the right scematic does it cause my hummmmmm…
Ok thanks i will try that but how do i ground the input? it is not connected…
grounding the input means you have to short the input to ground (= 0V). A non connected input is causing noise (simplified spoken it is floating). So please short the Pins J4 of the SID module and it is grounded.
Some 50Hz hum is normal but it shouldn’t be that bad… There might be a ground loop there too.