Let's see your finished DIY projects!



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Re: Let's see your finished DIY projects!

Postby fuzzonaut » Tue Jun 11, 2019 3:10 am

digi2t wrote:
fuzzonaut wrote:Amazing stuff on those last few pages!

It's been raining the last two days, so I've just finished another Deadend FX PCB built. It's their take on the Silver Rose. It was quite a tight fit. I usually solder just one or two pots to the PCB and wire the rest, because I'm drilling by hand and am usually not too precise while doing it. And I usually use bigger knobs, so spacing them out is cool.
This time though, all knobs but one (Master) and the 3 switches were pcb mount, so yeah, I'm just glad I got it in there.

It works alright, but while testing it, I observed something rather baffling: when the pedal is bypassed, the mids switch (upper right) turns the pilot light off and on - but that's not all, the Mix knob (Fuzz Mix) also acts as a dimmer, meaning the light gets brighter when I turn it clockwise (to the Superfuzz side) and it goes out when I'm halfway into the muff ......
That happens no matter if I've got something plugged in or not.
Anybody got an idea what's going on there? :idk: One of the pilot light wires touching something?

But anyway, it rips big time, so I guess I'll just leave the dimmer mod as is. :lol:

Silver-S.jpg


SilverS.jpg




Def not normal insofar as the LED is concerned. :idk:

First and foremost, I see that you're using sockets for the BS170 and 2N3904. If you're not getting good contact between the pins and sockets, then the Mill2 may act wonky, as it is now. Leave as is for now, and read on...

First, check R11. It should be 100K.

Second, what MOSFET did you use for the Mill2 bypass? I've had a bum BS170 do that to me in the past. You can sub a 2N7000 in there as well, but you have to turn it around 180 degrees (opposite to the silkscreen outline on the PCB). Generally, either BS170 or 2N7000 will work equally well, though on rare occasions, I've had a 2N7000 work better. I generally always use 2N7000's, but that's me. Since you have sockets in there, you can test. Try another BS170, or swap in a 2N7000 instead (observe aforementioned warning in bold italic!).

Also, check to see if the diode D11 is good, use the diode function of your DMM. Ultimately, on the fringe, the transistor (2N3904) might be suspect. Again... sockets are there, so test. Just about any NPN transistor should work here.

If one of the above turns up to be the culprit, then do yourself a huge favor, remove the sockets, and solder the components directly. That applies to all your other socketed components too. Sockets are OK for testing and/or auditioning, but once you've made your ultimate choices, save yourself from a shitload of headaches, and solder them in direct.


Thanks for all the advice! I'll go through these points.

It's a BS170 - I should have another one.

(I also noticed later on, that whether this is happening or not also depends on the position of the Presence switch.)
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Re: Let's see your finished DIY projects!

Postby digi2t » Tue Jun 11, 2019 1:04 pm

Your issue raised my concern, as such, I ducked down to the studio last night and fiddled with mine. As I mentioned before, I used a 2N7000 in place of the BS170, but I have no such issues, regardless of what switches or knobs I play with. In bypass, the LED stays off.

First, try another MOSFET. Speaking of which, where did you source the BS170? If the answer is "China", then there may be some doubt of the component. If that doesn't do it...

If you look at the schematic, the presence switch and pot are upstream of the Mill2 bypass. Theretically, R11 (100K) should be providing enough ground reference for the bypass scheme to turn off the LED and keep it off, but in this case, it isn't. Perhaps reflow the solder here. A cold joint here may provide enough ground lift to mess with the bypass scheme.
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Re: Let's see your finished DIY projects!

Postby fuzzonaut » Tue Jun 11, 2019 1:17 pm

Thanks again for all the advice and even the concern! :thumb:

I'll have a closer look soon - also at the schematic. I was too knackered yesterday to even try to wrap my head around any of this.

I get my parts mainly from Musikding, sometimes from Banzai. I'll get some 2N7000s with my next order.
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Re: Let's see your finished DIY projects!

Postby frodog » Tue Jun 11, 2019 6:31 pm

LaoWiz wrote:
frodog wrote:That's some interesting stuff man, and I'll also add my praise for your etched finishes, they look so unique and just.. hard, like a gentle giant killer robot.

Yesterday I housed this Soul Kitchen Heavy Darling circuit from a while back, in this antenna junction box I think it was, that's also been just laying around. Whenever I've had the inkling aluminum foil has been added to the inside, so it's pretty well shielded whatever that's worth.


Thank you, that Heavy Darling is a super old school DIY stomp circuit, yes?


Yep, credit to Dragonfly. I understand the name Heavy Darling(ton) but I don't know where the SoulKitchen moniker has come from. Is that also him? Regardless, it's a cool-ass, easy-to-build fuzz. Can see myself using it in for a '60s type sound e.g. It cuts well in a band setting too.

Here's a Rebote delay I built, with an LDR for modulation. Upped some of the cap values and a couple resistors, selected a non-clipping chip+jfet and it sounds really nice, even does a light boost with the fb/mix (acid) off. Rain is the time, it was supposed to be the other way around but still fits, as you turn up the time those rainclouds of noise appear. Below noon it's very passably clean. It does not self-oscillate is the only drawback but I don't really mind.

Oh yeah and this is a delayer, not just a regular delay. As far as I could find nobody had used that name before, or maybe they threw it around the boardroom and thought it sounded stupid, so I'm claiming that :lol: .Every PT2399 thing I make from now on is gonna be something-something DELAYER.

delayer_in.jpg


delayer.jpg
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Re: Let's see your finished DIY projects!

Postby hbombgraphics » Wed Jun 12, 2019 1:36 pm

that's a really cool looking build
like the finish
and the name "delayer"
I don't recall seeing that on anything
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Re: Let's see your finished DIY projects!

Postby frodog » Wed Jun 12, 2019 10:06 pm

Thank you. Think I may just have made the first delayer ever!

Of course i jest, anyone is free to use the description of what a delay chip does, but I felt like a real clever boy when I thought of that.

Here's what the first iteration looked like. I found some cans of Plasti Dip on sale and experimented. Comes in some amazing colors but it is nooot for pedal enclosures. Unless you do it perfectly and you enjoy the feel of rubbery things (a bottom plate coated with this would stick really well to carpet). But a piece of tape got stuck to it, and created a bubble when lifting it off. The membrane settled and held up, it's pretty strong, but clearly it wouldn't stand the test of time (or clearcoating). So as soon as I finished painting and took pictures, I started at the holes/edges and peeled the whole thing off like a skin.

delayer_1.jpg
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