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That is exactly what I am trying to avoid...

No vref as everything else is transistors/CMOS. I can probably fit a single transistor stage with the tonestack, but can't fit a buffer + gain recovery stage. Even if I put an op-amp on the other side, I still need half a dozen extra components to use it - and I don't have the room for that.

G'day. Been noodling through this design and made it up to the tonestack portion. The preceeding stage has a reasonably high output impedance, and I'm running out of board space. It's a CMOS Muff-ish thing, so I've got 3 preceeding gain stages. A solution I found was using an active BMP...

Well, it will still sound exactly the same - you'll just claim it doesn't :ROFLMAO:

22 is a standard value and will sound exactly the same

....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