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Pedal from the Barbie doll set :)

I cant't force you to follow our suggestions. Think about one thing - why designers of effects that emulate tube amplifiers don't copy tube schematics 1:1. I mean commercial pedals. Why do they simplify certain issues, or use equivalent circuits that do not resemble the original at all from the...

I agree. Or M800 Or Brownout OD Also a good read https://runoffgroove.com/thunderbird.html Don't try to blindly convert tube schematic to jfets.

Hm... I strongly suggest breadbording the circuit before ordering/making a PCB. Up to C100 it seems to be OK. Well, except for the aforementioned TR102. But the next part... let's assume that you set the bias for Q5 and Q6 using TR100 and TR101. Let it be 5V. As soon as you use the Presence...

Here's an example - check the schematic https://www.electrosmash.com/1wamp To make it stereo - just split the 22k resistors, add another 100n cap. Post #12 https://forum.pedalpcb.com/threads/balanced-effect-line-level-and-spread.22986/

I often add a transistor model using a spice directive directly in the asc file. I google the model, copy to clipboard, hit .op button, paste model, click ok. Then I change the name of the transistor to the same as in the model. For example - this is complete model of the 2N5088 .MODEL 2N5088...

Here's double tracker project with modulation feature.

There's still something wrong around diode. Routing should look like this It looks like you don't need to use the Vcc+ flag at all. Because pins 1 and 8 of the charge pump are not connected anywhere (except diode). You only use -9V. So the 9V flag is only on the anode side of the diode. On...

You have taken on a rather difficult task for a beginner - the layout should be nice. I would rather try to follow the schematic, of course trying to maintain "elegance". Now you have a lot of long traces, which can be easily avoided by moving some elements.

@Synchrony Pedalworks - you have to reverse the polarity of the C101 capacitor. Also - there's no filtering cap connected to 9V - (pins 1 and 8 of the charge pump). You have C101 on the negative rail, but no el cap on the positive rail. Another issue - potentiometer footprint overlaps with...

I'm sure.

Paths and vias unnecessarily so close to the pads. You have plenty of free space available.

According to the schematic, IC2.1 is a terminated, unused opamp. Did you change it to a buffered Vref?

Looks like 0805.

With a reactive load it will be as if a speaker was connected, only without the speaker :) Reactive load emulates interactoin betwen output transformer and speaker. Here's the frequency response of the above circuit: with and without the reactive load. I recommend trying another circuit -...

The output power is 100mW. This is a fully functional circuit - I don't see the point of modifying it and messing with MOSFETs, increasing the output power, just to use a load instead of a speaker. In this case, the lower the power the better. You will still need a load if you only want line...

This.

Not necessarily... For example - mmbf5457 from one tape, I unpacked about 20 pcs. Vp between -1.4V and -1.6V. It all depends on how small a spread you need.

Here's a recording - Unison in stereo. Two modes: dual detune and double take with different settings of the MIX (noon and max position) and TIME (9 o'clock, noon, max) knobs.