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https://aionfx.com/news/tracing-journal-king-tone-octaland-mini/ After finding and reading the AionFX trace, I think the problem might be the pot's effective value. When using a 50k pot with 2x33k, the effective resistance at the end of the taper is about 20k and about 28k in the middle. That...

I bought the Octaking as a kit from Musikding because it seemed less of a hassle in sourcing parts and paying import fees to Europe for the PCB. I was right to a certain point. The kit was missing one capacitor (not a critical one, the clean bright/low dip switch cap), and the voice pot was not...

Crazy money. There is a used one in Australia on Reverb right now.

@SamuelG I did not. I was reading datasheets only. You can build it with other transformers, though. It is in the build doc. @vigilante398 is selling the E4305 one.

Thanks, now I look at the transformer datasheets, and it should be fine. I was under the impression that the primary impedance is usually about the order of magnitude lower. With the Jensen, it should be fine to use 500k XLR pot with the 250k in parallel, as it expects 200k according to the...

I was studying the preamp a bit, and I have another question. Why is the XLR out volume 500k and not a smaller value? The 500k is too big for the transformer that expects much lower impedance, so it easily could be 50k, for example. The loading of the second triode wouldn't be a problem, but the...

Yes, just look at the schematic. Only the DI out volume, though. The output jack one is before the second tube that acts as a line driver (cathode follower). The trimmer is also linear, so you should expect different behaviour from the output jack volume. I would check all the resistor values...

I have built it successfully some time ago, but you are right about the signal routing. Not ideal, but that is the cost of having to put it in the 125B-sized enclosure with the footswitch and jacks in places where you'd expect them. The 4-layer PCB helps a lot here. In the last few years, I...

That makes sense. I thought it was going to be this. :D Cudos for keeping it closer to the original. There is no downside if you don't think about the added cost. :) I know about use cases in HiFi audio where people do this, but with a different type of caps because of lowering the ESR in...

What is the reason for having cathode bypass capacitors C13 and C14 in parallel? Maybe someone asked before, but I haven't found anything.

@Feral Feline

Yes, it is most probably just a passive DI box as in the schematic. They also have the "thru" option, which should be easy to implement..

I finally finished it today. Overall, it was a great experience. It was a bit frustrating, but that is a part of the journey. It is a reverb channel from the Deluxe Reverb with a "tweed" pot that ads mids in the way tweed tonestack works and no tremolo circuit. All of this packed in the...

I made this a few years ago. You just need tweezers and a steady hand to hold the part on the pads. https://forum.pedalpcb.com/threads/why-are-jfets-such-a-pain-in-the-ass.4878/page-3#post-219675 Or you can always solder them to an adapter board and work with them as if they were through-hole...

I think the SMPS circuit is tuned to a frequency of around 40kHz so it looks like you have some bad component value in a timing circuit maybe? It is a simple way how to generate a 250V supply. You will always have some noise unless you use a more elaborate circuit and maybe a bigger enclosure to...

By oscillation, do you mean high-pitch squeak overtaking the overall sound or just a background "noise"? It would be nice to share a picture of your build.

It is not JLCPCB but it looks like PCBWay started doing a fluorescent silk.

This bothers me a bit. I never really understood the "right" rotation in a library, so I have always changed it in the 3D preview in the web tool. Alternatively, you can rewrite your CPL file manually if you don't want to change your library files and make the fabrication repeatable without...

How did you select the HFE? Have you tried different values?

The compressor is strange indeed but it was designed like that.