Hey guys, been debugging an envelope issue with the clap for a little now and wanted to reach out to get some help. Checked all the parts in the clap circuit, no misplaced parts etc. Replaced the LM339 and Q86 (which is actually the "second" Q40 on the TR-909 schematic ![:lol:]( "lol")
) but still cannot get the clap envelope to fire 3x saw pulses. Followed the signal to and from IC29, here is some shots of what im getting:
Pin1 IC29:
Pin2 IC29:
Pin14 IC29:
Seems like there is something up with the stages between A/B/D of the comparator ?
Im running out of ideas, this is the only voice that isnt working properly on the build, everything else is firing nicely. Followed the description of the 808 clap as they're basically identical, just stumped atm...
![:help:]( "help")
) but still cannot get the clap envelope to fire 3x saw pulses. Followed the signal to and from IC29, here is some shots of what im getting:Pin1 IC29:
Pin2 IC29:
Pin14 IC29:
Seems like there is something up with the stages between A/B/D of the comparator ?
Im running out of ideas, this is the only voice that isnt working properly on the build, everything else is firing nicely. Followed the description of the 808 clap as they're basically identical, just stumped atm...
Statistics: Posted by biggiesmalls — Sat Aug 10, 2024 10:36 am — Replies 0 — Views 25