kokoon Posted September 10, 2005 Report Posted September 10, 2005 is it possible that i have a faulty sid - with just 1. OSC working? maybe there's something that can be fixed cause it has a really nice filter... it's a MOS 6581 3984.then i have another one broken - CSG 8580R5 2989 25 that just pops when a note is triggered (and you can hear some stuff going on in the background... can anything be done?what kind of errors/faults do your SID chips have? anyone ever fixed one? Quote
Acid303 Posted September 10, 2005 Report Posted September 10, 2005 and you can hear some stuff going on in the background... can anything be done?i have the same problem with one of my 8580. You hear the sound very very quiet in the background. I know that the chip once worked. I had some polarity problems with my modules, and after trying out some things the chip ended quiet.If someone knows how to fix it again.....?Axel Quote
OnAcid Posted September 10, 2005 Report Posted September 10, 2005 I've got a 6581 with a faulty lowpass filter. The Highpass filter still works though... ??? Quote
kokoon Posted September 10, 2005 Author Report Posted September 10, 2005 OnAcid: hmm maybe one of your filter caps is broken? Quote
Milkmansound Posted September 11, 2005 Report Posted September 11, 2005 I bought 6 C64's out of 5 SIDs, 2 of mine were beat - one has a bad lowpass filter, the other was just plain messed up: unresponsive. One C64 I bought had something completely different than a SID in the SID socket, so that one was out. Hey, we are salvaging from old devices - 50% is not that bad! Quote
kokoon Posted September 11, 2005 Author Report Posted September 11, 2005 yeah 50% is not bad - i bought them as broken c64's. so i guess i was even lucky. so far - i got 4 good SIDs out of 6 c64'swell actually i'm not really sure about how good the filters are on the 6581's cause i don't have a good reference but let's say the 2 i have are good. Quote
OnAcid Posted September 13, 2005 Report Posted September 13, 2005 OnAcid: hmm maybe one of your filter caps is broken?Nope, I replaced the sid and the new one was working perfectly. By the way, Do you guys think it´s a good idea to put heatsinks on the sids? They can get extremely hot. Maybe it extends the chip´s life? Quote
idiotcountry2 Posted September 13, 2005 Report Posted September 13, 2005 Heatsink(s) would probably be a good idea - particularly when they were originally heatsinked in the C64 (hence the white heatsink compound on the top of the chip).tm Quote
kokoon Posted September 13, 2005 Author Report Posted September 13, 2005 the one that's now got just 1 osc working was fully operational at first IF I REMEMBER CORRECTLY. but then i forgot to turn it off overnight and in the morning 2 oscs were dead.but i'm not 100% sure it was okay from the start. Quote
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