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OK, this got started over in the mods thread but im moving it over here. As chords and notes decay I hear a lot of fizzle. I'm using an op07cp from Texas Instruments. I have tried lm308. I'm thinking they are real because they came from Jameco, reputable place. Honestly I've tried every op amp...

Another layout plus schematic https://dirtboxlayouts.blogspot.com/2024/02/demeter-fat-control.html?m=1

https://tagboardeffects.blogspot.com/2012/09/demeter-fat-control.html?m=1 I used this in a vibe for a mids control. I haven't looked at the chauffer schem yet to think of where to put it

https://www.reddit.com/r/diypedals/s/eDH9YGMDSv Also here is a corrected layout. The other one isn't wrong but I think I spelled it put a little clearer. https://ibb.co/mFc2MKHY Right now I am doing a Frankenstien set of mods to an expandora. Everyone one is a new set of headscratchers. 😀

I only did the bass mod. However the problem is proving to be intermittent now so that says something is up. I put an lm308 in and still intermittent too so the search continues for now. Thanks.

In case anyone wants to talk about this circuit some more....what's with all the fizziness? You know, that background op amp crackle. Especially as notes/chords decay. I've tried different options (lm741, 5534, different brand op07s, etc). What adjustments can I make? I am however loving that...

With the high pass it sounds great. I was curious if I could make it more tame when it's off. But that probably affects the whole kit and kaboodle.

I just populated this thing and starting playing. Holy lord, how much bass can a circuit have?! I tried some different values at C28 but im sure there is a smarter way. I fear i have to knock down ALL the 10u and 22u caps. Has anyone dove into modding this to a more reasonable bass range?

Mo(not)onous Delay This was a fun project to delve into. I certainly didn’t stay true to the short delay, tape warble aesthetic. The delay still does that sound but now it can run wild too. Very versatile now for rockabilly, dub, shoegaze etc. Delay time is extended and feedback added to...

I popped it out to disable the fuzz portion of the circuit.

Interesting mystery of too many versions. Maybe we can elevate collecting the pcbs of the chalameau into a Gold vs Silver Klon kinda fervor. Chalumeau will be the beanie babies of Pedalpcb.com Thanks guys for the help. I guess I'll have to do the dirty work and trace. It's not so bad. Crack a...

does anyone have the build doc on this older layout? I'm looking to do some mods but would love to avoid taking the whole thing apart. Thanks in advance.

Thanks folks, lots to look into now.

I totally forgot about the chop shop. Great pedal. A little low gain but perhaps I could mod it to taste...

I recently built a hudson broadcast and love it. I'm looking to find other transistor only drives to try. No opamps wanted. The only other one i can think of off the top of my head is the smallsound/bigsound mini. Of course that one is jfet versus the broadcasts bjt's. Any suggestions?

Thanks. Next time I'll take a breath, check in with a loved one, then plan my order.

Just rabidly ordered the pastel preamp pcb. But now I'm looking around and don't see where to buy the 2N6429's. Is there an equivalent transistor?

There is info on how to do the jhs synth mod here. https://www.diystompboxes.com/smfforum/index.php?topic=106243.0 I did it to a ds1 and it's a lot of fun

You're a GD hero. Keep it up. 🫡

Thank you for this. Can't wait for the pcb to get here. Is there a reason build docs don't show target voltages? I don't mind reading through the boards to find out. Just curious.