Tried this one tonight: was able to get Q5 biased to 4.5v, but output was almost non existent, and really 'flabby' sounding. When I touched the Treble pot, got a very loud hum/noise through my test rig. Going to swap out the pots later and dig out the audio probe (if I can find it)...
Swapped pots, re-checked the build and it's still not working. Used J113s (known good) and verified the pinout before installing. Going to keep at it tomorrow once I find my probe.
haven't built yet, but the 1K resistor lead at L9 needs to move up to K9 so it connects to the Drain of Q3 to the Source of Q4. don't see any other errors. I'll build it later today probably. very curious about this one.
Think you could do layouts for the Mxr 6 and 10 band eq’s. Schematics here https://www.freestompboxes.org/viewtopic.php?t=3988
ReplyDeleteTried this one tonight: was able to get Q5 biased to 4.5v, but output was almost non existent, and really 'flabby' sounding. When I touched the Treble pot, got a very loud hum/noise through my test rig. Going to swap out the pots later and dig out the audio probe (if I can find it)...
ReplyDeleteSwapped pots, re-checked the build and it's still not working. Used J113s (known good) and verified the pinout before installing. Going to keep at it tomorrow once I find my probe.
Deletehaven't built yet, but the 1K resistor lead at L9 needs to move up to K9 so it connects to the Drain of Q3 to the Source of Q4. don't see any other errors. I'll build it later today probably. very curious about this one.
DeleteThanks for spotting that. The layout is updated.
DeleteBuilt! Not a big fan for my rig but it sounds like the demo :) only other thing I caught is it should 11 links. Thanks for the layout!
DeleteCorrected my build, and it's working fine. Thanks!
ReplyDelete