ok guys, finally my sid is making some noise
and i like it, but after the interconnection test i tried to check also the output with the oscilloscope just to see waveform
and i noticed that there is a small tension of 1v coming out of it…is it a problem?
Make sure there’s a DC blocking cap on the output. You shouldn’t have DC on the voltage output, that can misbias the input stage of whatever you’re plugging into.
do you mean the 10 microfarad electrolithic cap?
maybe the one that i soldered is not working…
i also noticed that if you touch the ground of the audio output for a while, suddenly the audio signal disappear and to have it back
i have to switch off the sid
if the problem can be solved changing that cap, i’ll do it
let me know
thanx
You should propably not use any electrolytic caps in AC situations, the can “take” only 1 polarity and may get damaged or even explode if voltage is applied in the wrong way. A ceramic cap in series (parallel wiring might give you plenty of DC and be pretty pointless - Lowpass) with the signal line should block DC good enough. If touching the ground changes stuff, something else might be touching the ground when it shouldn’t, so check for shorts.
When checking with an osc., be sure to have DC adjusted to zero before checking, and that all grounds are wired properly.