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....so there's zero quantifiable difference between the two brands, but your non-blind hearing test proved there was? Come on bro. At least pretend it's anything but imaginary :LOL:

'Audio' grade is marketing nonsense to sell to schlubs, and most of the technical reasons cited are more of a justification searching for a reason type of deal. I can guarantee that NOBODY can hear a difference by changing a single cap with equivalent specifications when it's just one small part...

No use whatsoever for a pedal - they're <5.5v in to +/-5v out and not even isolated. This is for an industrial power supply.

Tayda used to be pretty fast, but I've been averaging 4-5 weeks for an order of ~8 powdercoated enclosures. The last lot were stuck on 'in progress' for 3 weeks. When I emailed to ask where they were I was told they were still being painted, but were then marked as shipped 15 minutes later (so...

I still have no idea what you mean by LDO inverter. Can you please link to what you are talking about?

$5 is for unregulated 12v in (as this is a more common commercial voltage range). It's $15 for 2w, regulated, 9v in. What do you mean by 'LDO inverter'? There are LDO regulators, and inverters - both totally different things.

Again - they are literally the same thing in 99% of pedals. Referencing an op-amp to vref instead of ground has the function of creating a bipolar power supply. You can convert between either style by changing vref to GND, or GND to vref (isolated from any other parts of the circuit with a GND...

The question shouldn't be what is requiring a bipolar supply or not because they both do - one using a dual supply, and one using a single supply split in half. Referencing to this halfway point is also a bipolar power supply practice once you decouple DC from the equation. With a single 9v...

This is switching power supply PCB design 101 - you tie the separate grounds back at a singular point (preferably the DC jack, or at the bucket cap before the switcher.

Finished. I've added the PCBWay direct output and a BOM - everything is pretty straight forward and easily available. It does require a DC-DC converter (which I moved onto the switching PCB to massively reduce the radiated noise potential), and if you grab the datasheet for it the...

Almost done - just need to finalise a few things to make it as easy/cheap to make as possible. Using a fully isolated onboard switcher to get +/-15v rails, and I've included all the components to meet EMI requirements - there are a couple of SMD components required, but all very easy ones to...

All wire has resistance, and if it has resistance it will have an associated voltage drop. A meter of 24AWG has a total resistance of ~0.084 ohms. We know from ohms law that pulling an amp through the one meter loop will result in a drop of 0.084v across it (V=1*0.084), and we know from the...

It's basically just the two halves of a Animato split into controllable sections (as part of me messing around with dual PCBs) with some slight changes - I've got a Sziklai pair of BD139/140s that is controllable between a mid and treble boost upfront, and a cut down 22/7 at the back. I've...

I think it's like the tone wood debate - does it make a difference? Sure. Are there a million other things going on that could have as much, if not more, of an impact on what you're hearing than a single characteristic? Absolutely

Slots aren't 100% accurate to the original, but it's close enough for government work. Document is scaled to the correct size; align the cross with the center of the top face and you're good to go

I know this is a really, really old post - but did you ever discover any other series of CMOS chips that are quiet? I'm pushing my luck for room on this build that can only fit a DIP16 in there, and needs a couple more stages than just 3.

Your component designators don't match the current build documents. Can you please confirm which diodes/resistors you are talking about? I honestly don't see anything wrong with any of the values you have posted though - yes, you will lose voltage over any series diodes/resistors from the...

There's that witchcraft gyrator bandpass filter that will probably do the job - it's going to be absolute overkill and nuke everything outside of 1khz, but it's very cheap, has very easily available components and very low distortion. One of the examples given looks like it was made for this...

Honestly, little tweaks like this make a ridiculous amount of difference in ease of building - and something I almost always forget to do on my own PCBs :LOL:

Just letting you know I haven't forgotten - I've redesigned the board for an onboard isolated +/-15v power supply (that actually meets EMC class B regulation), and redoing the layout to reduce the noise floor even further (it was already pretty good on the original, but I reckon I can get...