Search results

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...

Not really - you can on the other side of the board that's about it. Isopropyl alcohol - just enough for the back side of the board. I use the cleaner to heat it up slightly, let it sit for a minute, give it a quick scrub with an old toothbrush then rinse it back in the cleaner.

Is there anything like build docs or something we can help with to get some stuff off your plate?

@Robert - follow up again

Finished up a micro overdrive for a friend, and for an extra little bonus I laser marked his band logo onto the front. There is a weird shadow as the scaling got all fucked up while doing the marking, so I need to spend a little bit of time cleaning the enclosure up before I hand it over...

No problem - I did have separate switching PCBs for it, but I'll do some rejigging to get everything onto a single PCB so they're easier to get made. The first version I made did need an 18v supply, but I've changed over to an isolated DC-DC converter to make them way easier to power.

Just a single chip? I've got gerbers for a 6 band with footswitchable boost that loves fancy ICs. I really do agree using high slew rate ICs for clipping doesn't sound that great

G's are sort of a weird one where you get minimal control at either ends, but a lot of fine control in the middle ranges. You can just use a linear in there and it will fine.