Hello! I have a Boss CE1 clone, king of chorus V2 board. I get bypass tone and preamp gain but no chorus sound. I've poked around with an audio probe around the TDA1022 chip and haven't gotten any vibrato/chorus. The chip was from small bear. D2 is omitted because of the DC/DC converter I chose. Any help would be great!
Boss CE1 king of chorus no chorus
- Thread starter cniers13
- Start date
I mean, to be fair the one in that video isn't working either.
Maybe the footswitches are used in a way that it doesn't matter. You should be getting audio out of the TDA anyway.
Have a buddy with an oscope or maybe at work/school?
I skimmed through some that thread previously linked. May be worth reading over.
Audio path, voltages and LFO seem good. That leaves clock and or the TDA. If you could get a hard confirmation on the clock, then we're looking at the TDA.
Unless Scuffie has something to add. But I guess he did his time on this circuit already
@johnk_10 ever get yours to work? I know that was 10k pedals ago...
Maybe the footswitches are used in a way that it doesn't matter. You should be getting audio out of the TDA anyway.
Have a buddy with an oscope or maybe at work/school?
I skimmed through some that thread previously linked. May be worth reading over.
Audio path, voltages and LFO seem good. That leaves clock and or the TDA. If you could get a hard confirmation on the clock, then we're looking at the TDA.
Unless Scuffie has something to add. But I guess he did his time on this circuit already
@johnk_10 ever get yours to work? I know that was 10k pedals ago...
Base should go to -14 through r29. That's continuity. Resistors establish continuity.
Do you have a short(0 ohms) from Q3B to -14?
Check resistance.
But also, there's a ton of series parallel going on there in that circuit block....
Sorry. Right tool for the job. Gotta get it on a scope if you can.
Your bias for the clock looks good(1/2 -14) per datasheet specs.
But I can't help you putz around with a DMM in a multivibrator via a forum. Coupe spend hours and get nowhere when 5 second and an oscope tells the full story. Right tool for the job and all.
Do you have a short(0 ohms) from Q3B to -14?
Check resistance.
But also, there's a ton of series parallel going on there in that circuit block....
Sorry. Right tool for the job. Gotta get it on a scope if you can.
Your bias for the clock looks good(1/2 -14) per datasheet specs.
But I can't help you putz around with a DMM in a multivibrator via a forum. Coupe spend hours and get nowhere when 5 second and an oscope tells the full story. Right tool for the job and all.