Hey I really appreciate the link and info!
I haven’t had a chance to look at it, walls of text are very overwhelming most times 
I’ll check that out tonight though for sure, I kinda wish I would’ve got 2.5A tbh, save on building another supply so soon, but that’s okay… I’m going to be reverse engineering the FC power supply so I can make a kosmo module out of it… easier on me to have switches and such 
The power supply is limited not only by the current output of the wall wart but by the voltage regulators in it (and their heat sinks). I suspect a 2.5 A wall wart would not give you much if any better performance, though I’d be happy to learn otherwise.
Here’s another design you can reverse engineer: GitHub - holmesrichards/ww_supply: ±12V power supply for synthesizers . Actually it’s pretty much just the MFOS wall wart supply.
Oooo, hey thank you for that! It looks pretty nice and compact too.
And yeah, I’m starting to see that the limit is indeed the voltage regulators.
I built a second power supply, and moved the 5-stack VCO to it along with a few other extra modules to keep it balanced between two different supplies and it seems to work perfectly now, it was just that I hit that limit after adding the drums
I pulled a “Keep plugging it in until it breaks” 
But yeah, I think you’re right about the increased amperage not affecting performance. Would just allow it to handle more current, probably make more noise even.
At this point, two supplies running on 1.5A seems to be working really nicely, no unwanted hums/sounds/noises/clicks to speak of as of now.
Honestly I’ve been building nearly non-stop since October on various projects, Wanda (kosmo modular) started in december with that sync’o module, now there’s 14 modules built…
The modulation station is the last one I’ve got on hand, it just arrived today 
The big issue though, it only looks like 14 modules… I keep forgetting to count that Sync’O VCO counts as 5 modules because of it’s power consumption
So if you count the modulation station, we’re talking 23 modules basically.
Something I found, the link you sent me, linked me to the source of that PCB as well, so I went there and found this little gem buried in the comments. (don’t ask why this one time, I managed to read it… I literally can’t do walls of text…)…
Check this out
The current capacity of the voltage regulators used. Voltage regulators vary in their current ratings. The LM78XX and their corresponding negative partner regulators (LM79XX) claim to provide up to 1A of current. If you use them with a 500mA wall wart you should only expect to draw up to about 400 mA from the supply. If you try to draw more current you will begin to get ripple and degraded regulator performance and the wall wart could become warm and even fail. The LM78LXX (and LM79LXX) regulators can provide up to 100 mA. If you use a higher capacity wall wart and a regulator that can provide more current you can draw more current from the supply without degraded performance.
Source:
http://musicfromouterspace.com/analogsynth_new/WALLWARTSUPPLY/WALLWARTSUPPLY.php
Ahh, I was also experiencing general oddity and noise recently until I added more PSU’s … I thought my beefy supply would have no trouble for my setup but not true. The VCO’s would get very noisy.
Here’s something I figured out after today, which I wish I would’ve recorded, but I at least know it well enough that I got this out of what happened…
An update to this:
The power hum was caused from the 7812/7912 being overloaded and then shutting down. This was caused by too many modules being plugged in to a single supply. The 7812/7912 are only rated for ~1000ma or ~1A, there are over 10 modules running at a minimum of ~50ma each, that’s already half of the supply taken up. Once you factor in ~150ma(x2) for each safety valve, you’ve now reached 800ma of the 1A supply being used. Now in reality, the Sync’o Da VCO module itself is actually more like 5 modules by itself, it pulls ~400ma and now we’re at 1200ma… which is well past the max limit of the supply.
At this point I tried a 1500ma supply but that still wasn’t enough, if that tells you the kinda juice it’s pulling.
The end result was that I had to use up the PCB I ordered to do the engineering video on, in order to quench the thirst of the synthesis beast that is Wanda.
So here’s my take away from this, do not use more than ~800ma worth of modules, per single FC power supply. Not ever. Plain and simple reason is that the voltage regulators will eventually burnout or shutdown or both. They’re only rated for 1A anyway, and once you’ve reached even 90% of that, it’s already losing it’s clean power and becoming unstable.
Best to limit your use to ~80% if possible.
That’s my take away from all of this anyway.
You can use higher current rated regulators and higher supplies btw, JS.
But the design called for what it called for and thus, it’s limited to ~800ma of clean power.
Interesting…on FCUK’s website they state you can use up to a 2-3 amp powersupply (wall wart i mean) granted you have far bigger heatsinks. Im guessing this is different to the amount of amps you can draw or is this something they should be aware of? im not sure how many amps my bassline draws but is similarly built to Sams aside having a stripboard version of the ms20 filter and i dont think ive had any weird issues.
That being said i have 1 3amp wall wart powering 2 powersupplies so the 1.5amp rating makes sense that you observed however i dont think FCUK states this…
Well…i thought they said that anyway…now after looking i cant find it mentioned anywhere that you could do that but i could of sworn i read it somewhere…
I’m not an expert on power supplies by any means, but just from what I know, It’s not really the wallwart that’s the issue, it’s more the thermal limitations of the voltage regulars once they exceed that 1amp (mind you, this is per voltage regulator, so you’re getting 1amp worth on +12v and -12v)
I was not really counting the combined, so much as the individual chip. And my personal setup was most definitely pulling over an amp per rail (+12v/-12v)
im no expert either, i just put the biggest heatsinks on my regulators that i could fit. For the hell of it lets make a water cooled synth :)))
You could have a 50A wall wart but the FC PSU still could not supply 50A
For some reason, my snare is just the bongo with no noise added in. The noise works, it’s just not added with the bongo! Where’s the first place I should check? 
I haven’t actually built the module, but it seems like if noise is working and low bongo is working and low bongo is sounding when you trigger snare, but no snare noise i’d check for continuity along the snare jack-D6-C5 [to check to see if it’s triggering the noise circuit at all on snares, and then start looking at the “Snare Mix” sections.
Just started working on this again and it’s giving me a fit!
If I turn the decay all the way up on any sound, the feedback starts. Adjusting the trim pots help, but none of them completely stop the feedback. It must be something easy, but I’m not sure what!
This is the inductor I’m using, is this correct?
yes 100uH inductor , thats the one to use so far checks out, I have loads of them
Thank you! I’m going to replace the ICs and see what happens 
I built this a little while back, and have been troubleshooting some issues for a while and am running out of ideas. I am getting crosstalk/(constant and unintended) noise on the snare/noise output, so it seems like it is something in the noise circuit.
I got a dodgy CD4011 at first that caused some issues and burned out the TL074s when I first built it. I replaced all three of them, but I can’t figure out what is causing the noise. I also tried swapping out Q1 and Q2.
The noise is quiet but noticeable running straight out of the module, but I was hoping to run it through the safety valve and that really brings it out to the point that I can’t get away with just trying to ignore it.
I am running a Trogotronic power supply with about 13 modules total, but have tried disconnecting everything but the safety valve and the twin t and still get some nasty hum. The worst cross talk seems to come from the spring reverb wet mix.
One of the earlier comments pointed to the transistors as a possible source, but I am used 2N3904 H331s which sound like they helped. It also sounded like power supply in one case, I’ve tried with only the one module plugged in and still had the noise.
Any ideas on what could be causing the issues or any more troubleshooting I could do short of swapping the remaining components in that circuit? I haven’t tried Q3 yet, so might that be a likely source?
the cross talk does tthat mean? the noise is basically the snare without the tom sound. the snare is a mixture of a tom and a snare.
oh or the noise is still present even when not being triggered. hmmm
Cross talk meaning sounds from other modules that aren’t patched in. I can have oscillator → spring reverb and then not output that signal anywhere, and then twin-t → safety valve → output, and hear the sounds from the completely independent oscillator/reverb patch in the output of the twin-t. Seems like it is either creating noise in the power, or some kind of interference happening.
If an example would help I can see if I can get something set up to record it.
Here’s a recording: Noise Example | Whyp
The first section was through the kick output which sounds fine, the middle section was through the mix bus (mix bus and snare output both have the issue), and the third section I turned the gain and volume on the safety valve way up to highlight both the constant hum and the crosstalk. The crosstalk is the filtered oscillator that you can faintly hear, which isn’t in any way patched into the outputs being recorded.
