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I don't know, maybe? I think it's a "pick your poison" kind of thing. This is the wrong routing around that transistor: And this is the corrected routing: I think it would be tricky, since one of those SOT-32 pads needs to be GND, which isn't just a trace, but a whole copper pour. So pad...

I had an miniaturized surface mount version of this design ready to go as soon as the through-hole prototype was validated. I submitted this design to JLCPCB not just for PCB fabrication, but also assembly. They were delivered on Monday! I had a The Fingers PCB all soldered up, just waiting...

Thank you! Definitely not the metal-film silver, just "regular" black on the green. I believe it will transfer whatever color you print on the decal, and in my case, my laser printer is black-only. It's kind of washed out in the picture because I used a flashlight with a diffuser so that I...

I'm not really trying to clone a Cogmeister, so much as borrow inspiration from it. What I'm actually going for is just a 2-in-1, which isn't anything new. I mentioned the Cogmeister mainly because it's an interesting idea, and also because it uses a Rangemaster-derived circuit as the first...

Yes, the buffer is always on. And I did think about the pickup loading effect you describe. At least in the way I have my board setup, my first pedal is a tuner, which has a buffer. So in my mind, I'm already buffered, so I've already lost the ability to "unbuffer", unless I change pedal...

Here's my Tube Bender Deluxe. This circuit draws inspiration from the Dinosaural Tube Bender (offered by PedalPCB as the Pipe Stretcher), but has been given the hot-rodded treatment by our resident circuit expert, @Chuck D. Bones. (I haven't built or played the Pipe Stretcher or Tube Bender...

Here's a PCB that's been sitting in my "to build" pile for over two years. Is is the Dragons Breath Boost, based on the Catalinbread Naga Viper Boost. The Naga Viper is of course an evolution of the Rangemaster Treble Boost. What motivated me to finally build this was reading about the...

@Chuck D. Bones - I want to build the boost-only circuit. Is the first schematic you posted still considered good for that? Or is the tweaked more complex circuit in boost mode better than the boost-only circuit? And if that first boost only circuit is still viable, should Q1's drain be set...

It's a success! Build report here.

It works! See here for the background: Plug-n-Play Buffered Electrical Bypass Using CD4053 and Momentary SPST. In short, it's a dedicated circuit and PCB that does two things: (1) always-on buffer, and (2) electrical bypass via CD4053. This is essentially how Boss pedals do buffering and...

In this case I don't want to cut the wires off the pot, at least not all of them. Two of them are actually the shield braids from the pickups. The pickups' "hot" wire is shielded. So the wire comes from the pickup cavity, and at that point it's closest to one pot. About two inches of the...

I have a Circuit Specialists CSI-Station1A, which they don't appear to sell any more. It's a 40 watt unit. I bought it in 2011. Link to the manual. The tip is probably as old as the unit itself, maybe it's time for a new tip?

Not directly a pedal question, but I know many around here have changed their electric guitar's pickups and/or pickup wiring. I went to simplify the wiring of one of my guitars (change a 5-way pickup switch to 3-way). The stock wiring basically uses the metal case of the pots as a ground bus...

Is there anything special about the MPSA13 transistors in this circuit, other than they are Darlington transistors? More specifically, could each be replaced by a pair of commodity BJT NPNs (e.g. 2n3904 or bc549) configured as a Darlington pair?

A couple weeks ago, I started a thread with the same title over at DIYstompboxes: Plug-n-Play Buffered Electrical Bypass Using CD4053 and Momentary SPST. I want to create a buffered electrical bypass scheme activated by a momentary SPST switch (similar conceptually to what is found in most Boss...

What are your thoughts on putting C1 in the opamp's feedback loop, or with a small series resistor after the opamp's output? As you say, the original function (RF filter) is nice in theory, but could have tonal effects when considering a generic use-case (e.g.. pickup loading). IOW, buffers...

I use the LP2950 as a 78L05 drop-in replacement. Not quite as nice as the AP7375, but definitely better than 78L05, and readily available in through-hole TO-92 package.

Thanks! It's such a luxury to be able to have a small, custom PCB fabricated and shipped for $5 or so. I honestly don't know, but that's certainly a reasonable guess. That's the only deliberate change from the previous Amethyst I built. But there were other random changes that shouldn't...

This is my second Aion Amethyst build. Here's my first. My wife got me the MN3005 and the CT3101 from @Cabintech for Xmas. My previous build used the (much cheaper) 3205 BBD. The main reason I was interested in the more spendy 3005 BBD chip is that it can run at a higher voltage, and I...

@Chuck D. Bones, what is the purpose of R9? In the most recent schematic it's 470k parallel with the C500k treble pot and R7/7k5, and in the earlier schematic, it's 100k parallel with the C100k treble pot and R7/1k5. Isn't the net effect of R9 to essentially half the treble pot value? IOW, in...