hikey

Errr, It doesn't emulate the filters at all?? So it's absolutely not convincing imo.

lol. You'd think they would be more careful after paying some poor sod in a sweat shop a few pence an hour to sand them down and dip them in some double happiness wouldn't you? It's a shame they don't realise that they'd do alot better if the chips were just left alone, rather than trying to 'refurbish' them. So you returned all the 8550R5 chips even though alot of them probably worked ok? (i can understand why, it just doesn't seem right if they have incorrect markings on them).

these chips look very similar to the samples I had from Santion Components. Same font and clear printing. In my case though, they got the date code wrong (8580's in 1984? lol) And they were actually 6581 chips, with a 100% failure rate. Still, not as bad as some of the remarked chips going around with 'Commodor' printed on them. lol In fact, the only company i've ever got 100% genuine New-old stock chips is from Parkeli in Hong Kong.