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The PPCB PCB gives you the choice of either nature or bass+treble. Nothing against nature (which is a combined bass/treble tone control), I just opted for separate bass and treble instead.

And the part #s in the Muffin Fuzz carry over to the Muffinator as well (except for the additional diodes which Chuck already mentioned). Also, check out this post by @Robert for the switch orientations: https://forum.pedalpcb.com/threads/missing-build-docs-schematics.3784/page-70#post-271717

Here's my build in a Tayda Viva Magenta colored 125B w/ purple knobs and LED. I've switched to UV printed vinyl stickers for my enclosure art, followed by 2 layers of sprayed satin lacquer. Super easy to install, very crisp fine details (printed from SVGs), and wonderful colors. (Also quite...

There is a tiny asymmetry, but the distortion is quite small for an overdrive pedal. These two articles measure it. https://linearaudio.net/sites/linearaudio.net/files/Bateman%20EW%2012%202002%20mar2003%201uF%20electrolytic%20or%20film.pdf...

For now, let me post this excerpt from this article on 'Electrolytics for AC Coupling' [https://northcoastsynthesis.com/news/electrolytics-for-ac-coupling/] Here's a simplified equivalent circuit diagram (for a polar aluminum electrolytic capacitor).... It is based on a more detailed...

Actually, I may have goofed and gotten over my skis on this - let me do some refreshing on this tomorrow and report back. And people who know this better can pipe in and answer (and correct my goofs). But it is quite common to see electrolytics in use w/ close to ~0 Vdc across them, and yet...

Note the US wants the tariffs, but doesn't want to do the work - so the shipper has to do the work and then send the $ to the US. How generous! So the shipper will also have to charge an additional fee for their own time as well. With millions of packages every day, the logistics takes time...

Right, if the don't have separate specs for max DC and max AC, look for text like this (from a Panasonic cap spec sheet): The sum of DC and ripple peak voltage shall not exceed the rated working voltage and then they provide a frequency correction for the ripple (ac) voltage: Edit: Ack...

Interesting! I don't think there's much DC voltage across C11 or C19 in this circuit, just AC. But you could always use a nonpolar electrolytic and thus be totally safe - seems the best choice. I think most polar electrolytics should be ok w/ AC if they're rated for higher voltages, the...

It's not the companies that are stopping shipments to the US, it's the national mail services in the European countries that are stopping them! The reason why is that the US hasn't made clear all the rules about how to collect the tariffs, how and where to submit them, etc. The US is doing...

From @thomasbe86's I-V measurements, they do seem to be fairly special. I don't see many other diodes in his data that are similar to the 2D503b's with regard to their combination of Vf & curvature. And almost all that are similar are no longer made and tough to locate. It's the curvature...

Translated by Google Thanks go to @Robert

I had seen this data on Ebay (upper left plot), but it's at too high of a current to be relevant for most pedals.

@PedalBuilder - many thanks, this is EXCELLENT!

@Barry - thanks! So it's I-V characteristics are equivalent to a 1N914A/1N914B. OK, got it. (y)

Humor aside, though, does anyone have actual data on them? E.g., I'd really like to see forward I-V data.

I see @Robert is selling Russian 2D503B Si pulse diodes, but don't know anything about their characteristics and could not locate a datasheet for them. So does anyone have a datasheet? Can anyone tell me about their utility, and for what pedals and situations they are useful? Thanks in advance!

Agreed. And the same applies to the ground wire on the PCB (the one going to the stompswitch), plus some of the solder connections on the stompswitch itself. Some other thoughts: Definitely check J201 biases with a voltmeter, make sure those are properly connected and working ok. Have you...

I believe DHL's Express Service *is* doing imports w/ tariffs, while standard DHL is presently pausing shipments into the US because of the orange guy's new tariffs on de minimus shipments.

With only $6.45 for shipping, you definitely avoided tariffs - you just got in under the wire. With your total, tariffs would have been another ~$40 on top of the shipping. So you won the lottery on this one!