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#31
Open Discussion / Re: Got bored, building a bass...
Last post by jimilee - February 05, 2026, 09:04:05 PMQuote from: jessenator on February 05, 2026, 07:56:40 PMSadly byoc has closed up shop. Had a final sale end of 2024. Don't recall the reasons.I think the BYOC schematics are linked by someone over on pedalpcb.
I have a mbp Promenade in my build queue. I wonder of aleph null's Otolith could be optimized for bass (maybe just cap values?) That's a very versatile beast and can do super sludgy to punchy.
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#32
Open Discussion / Re: Got bored, building a bass...
Last post by jessenator - February 05, 2026, 07:56:40 PMSadly byoc has closed up shop. Had a final sale end of 2024. Don't recall the reasons.
I have a mbp Promenade in my build queue. I wonder of aleph null's Otolith could be optimized for bass (maybe just cap values?) That's a very versatile beast and can do super sludgy to punchy.
I have a mbp Promenade in my build queue. I wonder of aleph null's Otolith could be optimized for bass (maybe just cap values?) That's a very versatile beast and can do super sludgy to punchy.
#33
Open Discussion / Got bored, building a bass. Ne...
Last post by phreek - February 05, 2026, 06:10:57 PMSup gang! It's been a minute.
Firstly, WTF happened to BYOC?!
Nextly, is there a bass muff layout somewhere? Also, what bass pedals are you rocking? Gonna be looking for ideas for more sludgy, doom-esque kind of affair.
Whatcha got?
Firstly, WTF happened to BYOC?!
Nextly, is there a bass muff layout somewhere? Also, what bass pedals are you rocking? Gonna be looking for ideas for more sludgy, doom-esque kind of affair.
Whatcha got?
#34
General Questions / Re: all-silicon Cosmopolitan o...
Last post by Aleph Null - February 04, 2026, 07:46:53 PMNah. Just slap a BS170 in the stock circuit and see what it does. You might have to change R12 if the bias is way off, but it probably won't be.
#35
General Questions / Re: all-silicon Cosmopolitan o...
Last post by jessenator - February 04, 2026, 07:31:58 PMQuote from: Aleph Null on February 04, 2026, 04:52:42 PMWhat about using a mosfet for Q3?So something like this for the output stage?
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#36
General Questions / Re: all-silicon Cosmopolitan o...
Last post by Aleph Null - February 04, 2026, 04:52:42 PMWhat about using a mosfet for Q3?
#37
General Questions / all-silicon Cosmopolitan or Di...
Last post by jessenator - February 01, 2026, 06:11:59 PMRead in the build doc for the cosmo that Q3 can be subbed, theoretically with some other component changes. Wondering if anyone has tried it and come up with a tone they like there. Haven't breadboarded this one yet as I spent my time with another circuit:
As far as the dizzy tone, the PPCB forum came together with an NPN version of the Gnat (Buzzaround), which I like quite a bit. I was experimenting with it this weekend going through each, seeing what I could and couldn't replace with silicon.
Q1 and Q2 are just a darlington, but I still wanted to see if I could sub with equivalent low-beta with and without the resistor across C-B. Zero luck there.
Tried medium gain in Q1 (286) with no resistor. It sounded pretty decent with a low-ish gain (84) with a 2M2 across C-B. This was all still with an AC127 in Q3. Okay, but the sustain dropped off, might need to adjust a few other values, but not sure which.
However trying to replace Q3 with silicon was a dead end. Looked at some other schematics out there, tried adapting that final stage, even adding another gain stage before the final volume. Just sounds bad. Not even "different," just bad.
Seems like a similar situation with the Cosmo needing that germ in Q3... If anyone's got some insight on that one, I'd appreciate it.
IF what I'm looking for is better served up in a different circuit I'm open to direction. Just had this idea in my head to have two flavors of the same basic circuit.
As far as the dizzy tone, the PPCB forum came together with an NPN version of the Gnat (Buzzaround), which I like quite a bit. I was experimenting with it this weekend going through each, seeing what I could and couldn't replace with silicon.
Q1 and Q2 are just a darlington, but I still wanted to see if I could sub with equivalent low-beta with and without the resistor across C-B. Zero luck there.
Tried medium gain in Q1 (286) with no resistor. It sounded pretty decent with a low-ish gain (84) with a 2M2 across C-B. This was all still with an AC127 in Q3. Okay, but the sustain dropped off, might need to adjust a few other values, but not sure which.
However trying to replace Q3 with silicon was a dead end. Looked at some other schematics out there, tried adapting that final stage, even adding another gain stage before the final volume. Just sounds bad. Not even "different," just bad.
Seems like a similar situation with the Cosmo needing that germ in Q3... If anyone's got some insight on that one, I'd appreciate it.
IF what I'm looking for is better served up in a different circuit I'm open to direction. Just had this idea in my head to have two flavors of the same basic circuit.
#38
Open Discussion / Re: Just Saying -- the soapbox...
Last post by lars - January 31, 2026, 01:50:42 AMGroan...
#39
Open Discussion / Re: Happy New Year 2026, Pork ...
Last post by jimilee - January 27, 2026, 09:47:17 PMQuote from: fair.child on January 27, 2026, 09:29:23 PMI found this one and started working on itVery cool.
https://www.demedasheffects.com/blog/surface-detail-diy-analog-chorus
the Druid LFO is more PWM than sinewave LFO. I'm researching if I can make LFO sinewave that I can use rate control between 0.5Hz to 8Hz. By the way, this is the core of TSC.
There are two design considerations;
1. using MN3007 and MN3101 with +15V/-15V charge pump
2. using MN3207 and MN3102 with +9V
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#40
Open Discussion / Re: Happy New Year 2026, Pork ...
Last post by fair.child - January 27, 2026, 09:29:23 PMI found this one and started working on it
https://www.demedasheffects.com/blog/surface-detail-diy-analog-chorus
the Druid LFO is more PWM than sinewave LFO. I'm researching if I can make LFO sinewave that I can use rate control between 0.5Hz to 8Hz. By the way, this is the core of TSC.
There are two design considerations;
1. using MN3007 and MN3101 with +15V/-15V charge pump
2. using MN3207 and MN3102 with +9V
https://www.demedasheffects.com/blog/surface-detail-diy-analog-chorus
the Druid LFO is more PWM than sinewave LFO. I'm researching if I can make LFO sinewave that I can use rate control between 0.5Hz to 8Hz. By the way, this is the core of TSC.
There are two design considerations;
1. using MN3007 and MN3101 with +15V/-15V charge pump
2. using MN3207 and MN3102 with +9V