Bring out yer Diptrace

Wondering if I can get a sanity check on my Jawari layout. The Jawari is a sitar-like Escobedo circuit fragment (towards bottom of the page here). He seems to use somewhat different conventions than I'm used to - perhaps these were more common in 2000 or so?! The in/out labels and footswitch are somewhat idiosyncratic, and the power section is missing a reverse polarity protection diode. I tacked on a volume control at the end of the circuit as well, but I'm wondering whether it's better as I have it, or perhaps as a single A250K pot without the R3 resistor.

I hadn't done a J201 layout - I think I got DSG right for the Aion adapters (or for other JFETs like 2N5457, although I understand the sound might be somewhat different).

I've also never had a build with a transformer (have my first PPCB transformer boards in my Black Friday order), so not sure if extra care needs to be taken in routing near them.

Thanks!

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layout.png
 
rwl said:
I tacked on a volume control at the end of the circuit as well, but I'm wondering whether it's better as I have it, or perhaps as a single A250K pot without the R3 resistor.
Click to expand...

The way you implemented the volume control is exactly how Moonn did it.

Everything else looks good as far as I can tell!
 
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@rwl Can't help you with the transformer question, because I haven't used them either.

+1 for the symmetry on your layout. Nice, clean placement.

I have used J201s, which are mainly available in SMD format now and aren't particularly difficult to solder. It might be cheaper and more future-proof to use a combined footprint that allows you to mount the SMD component on the same board and that way you can roll with whatever you have access to without relying on additional adapters. Just a thought. There's room to put the SMD footprint to the left of the through-hole component and you'd probably end up with +2 symmetry as a result :D
 
Grubb said:
I have used J201s, which are mainly available in SMD format now and aren't particularly difficult to solder.
Click to expand...
I think I need to create one of the hybrid SMD/through hole footprints... I'll give that a shot before getting this fabricated.

@finebyfine thanks for taking a look as well. I did look at the Moonn schematic but also found parts of that to be confusing!
 
rwl said:
I think I need to create one of the hybrid SMD/through hole footprints... I'll give that a shot before getting this fabricated.
Click to expand...

Definitely worth doing. If I was better about it, I’d even use SMD hybrid footprints for BJT transistors
 
rwl said:
It's done - just sent this for fabrication
Click to expand...
Your layouts are improving, looking good!

One small suggestion... you may want to consider increasing the font size, particularly on your control labels, diode values, and anything similar in size/weight. It's likely that this is a bit smaller than the PCB fab can legibly silkscreen.
 
Non guitar pedal related double post. Maybe the silliest thing I'll ever make.

We have some random equipment at work that is easier to use with sd cards than cables and keeping one loose in my pocket always makes me think it's a guitar pick and therefore something that can just get flung across the room when I take off my pants. Every storage thing I could find was for like, 10 cards, and I just use one at work. Uses a 50 cent smd connector.

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Spun up a layout this morning for the tube burn-in/tester prototype I came up with over the weekend, looking forward to getting this in and put together. Switch in the front is to power on the module, switch in the back is to switch between 12AX7 and 12AU7 levels. Trimpots are for initial calibration, it's a set-and-forget control so I figured no need to put it on the top.

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Couple of Boards nearly ready. Another one needs to go back in the oven. It's been a while. Got a few spare G enclosures I need filled, so…

Managed to get all the traces (save the ground) on one layer: Grunt. (a nod to Bean's 1590A 'Runt') MOSFET clipping Rat without the useless LPF pot. TO99 can footprint for the LM308. (Have a trace routed between the holes, so dual footprint may not work.) And bottom side MMBFJ201/5457 SMD footprint. That BS170 doesn't look pretty right there, but should sit up high enough to not collide with the BAT41 or 1k resistor.

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The Jade Gazebo (Green Ringer), because why not? Also, I was not thinking straight and forgot this schematic was pre-val-footprint-conversion, so it's refDes. R6 and R13 clear the JLC DRC I have, so hopefully it won't bridge… IDK, maybe I'll tweak it some more, or add solder mask. I just bend the clips on those 9mm pots anyway. This one was kicking around my projects folder (might've been the second one, right after the super fuzz), and never had a good layout. The circuit is small enough for the G (or A), and this one looks a lot neater than the first attempt, even though I had to route 6 traces on the top layer.

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I'm only going to need one of each, so I'll be giving the remainder away once my build is verified. Can go into a B if G isn't your thing.
 
I saw a great post on a rando forum (looking for info about omitting it), basically it said: "you have about 3 degrees of usability then it's worthless" I never touch it. It's never too bright like some breakdowns suggest. To my ears, anyway.
 
Not the prettiest, but it's a single-sided board for an etch on the PedalPCB pots drill pattern. Should fit in a 1590B as well as the more standard 1590N1 enclosure.

It's the CDB modified Animals Diamond Peak

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Might see of I can place Q3 a bit better. Looks like I can. Hasty last night layout…
 
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