Is it a 74HC4250? If so, you have the wrong part. I suggest you read the parts FAQ, as it covers the issue. Basically, there are 5V chips that use the same numbers as the CMOS chips, and they get stinking hot.
KenOn Tue, Apr 28, 2015 at 2:49 PM, spunraddish@... [cgs_synth] <cgs_synth@yahoogroups.com> wrote:Hey guys, my first post here. I wired up my wave multipliers, and almost burned myself on the 4250s - there was no smoke, and I was able to turn it off before anything got destroyed, or so I think, since when I would power it on again, the same thing would happen. I think I've used these 4250s before with other cgs boards, but didn't have to flip them around.
The top and middle section of the wave mults output nothing audible, though there may be a dc offset on the outputs, and the bottom section sounds beautiful.
I don't know much about the 3080s, they aren't a pressing matter with such heat coming off the transistors.
Any ideas?
Thanks,
Eric
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