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Are the envelope filters by PPCB or others comparable to the EHX Nano Q-Tron pedal? Looking to build something comparable with a volume control as well.

I used a TC1044S(CPA) so should be fine. I just boxed the pedal and the oscillation is indeed gone. It sounds quite good only when the cut is moved to around minimum or 9 oc and the treble is raised it really sounds horrible IMO. With the cut to max and treble to max it's working as expected...

I tried removing the D1 3mm led that’s the clipping diode for the second gain but it didn’t make it better so I kept it to have the sound the base pedal was “designed” for. ;)

I also finished this circuit recently and the farty decay is indeed well known and much discussed even among buyers of the real thing. ;) I’ve moved from an OPA2134 to an NE5532AP which I like better in this pedal and removed the jazz/rock switch and the 470n because the jazz setting is...

Using the TSC in the web (http://www.guitarscience.net/tsc/info.htm) for the Vox tone stack I noticed that the treble indeed goes way over 10k. The 100pf is normally 47pf which reduces the treble somewhat: I see a zener with a 717 ohm value. How can I measure if the zeners I used of 3v3 are...

I will box it tomorrow so I’ll know if this improves it! Thanks.

I just build the cobbler and noticed that the top range of the treble control is extremely piercing. I checked some demos on YouTube and my build is sounding comparably except for the treble knob. Since there’s no schematic yet I tried tracing the components around the B1M treble control: -...

I've noticed that Musikding has a very limited stock of colored 125B enclosures. Are there any other suppliers in the EU?

Interested in this as it’s an upcoming build for me. ;)

The other 2 preamps of which the documentation is available use 47r so I reckon the 47k is wrong? @Robert?

Great build Mike, looking forward to hear it. ;) Which wire do you use to bridge the 3PDT and the PCB?

Did it resolve the gain issue? The heavy hand side should be able to be clean and work more as a boost on lower gain settings. You’ll hear the difference between hard clipping on or off quite well. Asymm is more a feel thing where it’s a little less compressed imo

Check the values of the components, did you measure those dual and triple combined resistors? Trace the dip switches because the single Heavy Hand from AION had the asym and hard clipping reversed. The single heavy hand can go very clean because it has a clipping toggle switch next to the...

The difference between opamps is more noticable on lower gain. ;)

Cool, that must’ve been a lot of work! I like how you follow the chords in the bridge nicely in your lead part!

I recently build a Muroidea and noticed a big difference between a LM308N and a TL071. The latter sounds more open, brighter and less nasal especially on higher gain. The OP07 doesn’t need the 30pf cap BTW. Try the TL071 and see what you think. The reason I experimented with the opamp was...

I now see that @jhaneyzz mentions putting a cap over the volume pot which indeed should be a Miller cap between collector and base of Q1. I’ve used a value of 820pf or 1nf and I still keep the tone of the pedal between 0 tot 3 oc depending on the gain switch.

I personally like it at 27v and also above unity to drive the input of pedals afterward or the amp. I use the simulcast as a preamp to play pedals through it.

I’m in the Netherlands so sourced it here.

Try a lower value cap between say 500 and 1000pf. I’ve also replaced the germanium transistor with a 2n4033 which makes the response somewhat smoother and more in the direction of the Ariel Posen version.