A build thread.



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A build thread.

Postby Paul_C » Wed Mar 20, 2019 7:35 pm

I trust this will be ok, and maybe entertaining for some.

I'm going to try and record my progress as I build a Parallel Universe, based on a layout which is freely available on Parasit Studio's website.

As far as I'm aware it's not a commercially available product, and I have no intention of starting a business selling pedals, so hopefully I'm not breaking any rules by doing this.

I've accumulated the necessary parts (but used one of the pots in another build so I've got some more on order) and drawn out the layout on paper (for some reason I prefer to do this rather than take a laptop out to my workshop) so I'm ready to make a start.

All being well I shall make some progress tomorrow and take a few photos as I go, and I'll document any problems (or mistakes on my part) if they occur - hopefully this thread will help me stay focused ;)
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Re: A build thread.

Postby BetterOffShred » Wed Mar 20, 2019 8:18 pm

It's the PU2 probably Eh?

It's Colin's design but I'm sure he doesn't care.

Try multiple 386s, the oscillation is pretty touchy and will be different with each :)
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Re: A build thread.

Postby Paul_C » Thu Mar 21, 2019 5:12 am

Yes, PU2.

Trying multiple ICs sounds like a gateway drug to "having to" build more pedals to use them up ;)
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Re: A build thread.

Postby BetterOffShred » Thu Mar 21, 2019 11:54 am

Well the 386 is very unique, though it's made in 3 voltage ranges, and all 3 sounded different in my build, and even among each range, different chips sounded different. 386 is used in a lot of things as a gain stage so it's worth having a bunch.

It's a good pedal but you may want to look at what dino did with a load emulator using a 018 transformer so it works right on single coils. It's been years since I built mine, and I have mostly humbucker guitars so I didn't do it to mine.
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Re: A build thread.

Postby Paul_C » Thu Mar 21, 2019 7:45 pm

First steps taken tonight - I trimmed the board to size (I have a handy band saw which makes this easy), marked the position of the cuts and drilled them followed by tidying the rough edges with a scalpel (the drill bit was a bit on the large side, if I'm honest, I'll use a slightly smaller one next time), then soldered in the links and the IC sockets (which took longer than it should because I had to take the sockets off again for a couple of missed links and then put them back on - sigh).

No transistors in this build so next up are the resistors, caps and one diode, which I'll install tomorrow evening.

Here are some slightly blurry pics:

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Re: A build thread.

Postby Paul_C » Mon Apr 01, 2019 5:54 pm

Finally got back to this after some more transistor swapping has made my Random Number Generator sound more like it's supposed to.

This evening I finished populating the board, with only one error - I put a 47k resistor where a 4.7k resistor should have been - and that was quickly sorted.

Next I've got all the outboard stuff, pots, jacks etc. to attach so I can plug it in for a (hopefully) quick test before preparing the enclosure.

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Re: A build thread.

Postby eatyourguitar » Sun Apr 07, 2019 12:18 am

when collin did it with PCB mounted jacks that was pretty much the best way to keep it from having a lot of problems. I built a PCB with a proper ground plane but flying wires everywhere and it was shit. I already posted my rant about why I don't like it so I will not post the complete explanation twice. all I will say is that it can be fun but actually owning it and trying to tame the beast is not as easy as you might think. it is definitely not something to take on tour.
WWW.EATYOURGUITAR.COM <---- MY DIY STUFF
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Re: A build thread.

Postby Paul_C » Sun Apr 07, 2019 4:06 am

I'll have a look for the rant later ;)

I've got it completed and it makes some sound, but nothing like enough - I've since read that it can be very sensitive to which LM386 is used, so I've ordered a few in the hope that the issue is that simple, but now I know there's a rant I'm beginning to think it might be a while until it's behaving :)

I built a Random Number Generator which I'm still trying different transistors in as it seems like it's another one where everything has to be just right for it to work optimally - luckily at this point I'm still considering these things as ideal ways of learning rather than reasons to give up building and finding another hobby ;)

A friend asked if I was thinking of making pedals for sale and I quickly let him know that I'm not going to spoil the fun by doing something as daft as that.
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