Jürgen Haible Krautrock phaser BUILD THREAD

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AonFLuX
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Post by AonFLuX » Fri Nov 30, 2018 8:09 am

Very nice! Planning on selling cases? :)

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diophantine
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Post by diophantine » Fri Nov 30, 2018 11:16 am

AonFLuX wrote:Very nice! Planning on selling cases? :)
http://vandaal-electronics.com/product/ ... ng-x-case/

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soup
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Post by soup » Fri Nov 30, 2018 12:24 pm

vandaal wrote:Built and designed a case for the beast.
Sounds great on synths and beats. Really fun!

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Very nice!

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AonFLuX
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Post by AonFLuX » Sat Dec 01, 2018 6:55 am

diophantine wrote:
AonFLuX wrote:Very nice! Planning on selling cases? :)
http://vandaal-electronics.com/product/ ... ng-x-case/
Sweet! Ordered :)

Level5
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Post by Level5 » Sat Dec 01, 2018 4:06 pm

Ordered, too :tu:

Now only one in the shop available...

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grenert
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Post by grenert » Sat Dec 01, 2018 4:54 pm

vandaal wrote:Built and designed a case for the beast.
That looks fantastic! Where did you source the big red button and the sharp-looking knobs? Jameco sells some knobs that go all the way to 12!! :hihi:
https://www.jameco.com/z/RN-12POS-Arndt ... 58143.html

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Post by vandaal » Mon Dec 03, 2018 1:01 am

grenert wrote:
vandaal wrote:Built and designed a case for the beast.
That looks fantastic! Where did you source the big red button and the sharp-looking knobs? Jameco sells some knobs that go all the way to 12!! :hihi:
https://www.jameco.com/z/RN-12POS-Arndt ... 58143.html
Hello.

That red switch is ONPOW LAS1 series ON-OFF pushbutton with red illumination. (16mm panel cut) You can put there what ever fits 16mm hole and is ON - OFF. I used 24V version. It gets 12V from the circuit.

More options to dial (12 or 11) is always nice to have :D

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nologin
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Post by nologin » Wed Feb 20, 2019 2:41 pm

A guy told me that the photo resistors must be matched, there is no explanation about it anywhere, someone could give some explanation how to proceed? :help:

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Post by vandaal » Mon Feb 25, 2019 2:10 am

They have to be in a correct region and according to the spec sheet. But they dont need to be 100% the same on the whole curve. Buy 8 and try it out. Its analog machine. You want it to be off, thats the whole beauty. Worstcase the filter cutoff is not that deep, but it still works. Later if you have the machine ready you can start improving.

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Post by keninverse » Mon Feb 25, 2019 9:36 am

nologin wrote:A guy told me that the photo resistors must be matched, there is no explanation about it anywhere, someone could give some explanation how to proceed? :help:
Best way is with a curve tracer, next would be a jig and o-scope last would be just measuring the on/off resistance with a DMM. Set up a LED on a breadboard, plug in some optos to hold them in the same position, measure the on and off resistance. If you have a multichannel scope you could set up a channel for each opto or you can also record the output if you have a newer one.

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Post by Bamboombaps » Tue Feb 26, 2019 4:53 pm

soup wrote:
IID_nrebs wrote:how do you manage to fit all the stuff into such a small box? Especially the lamps. can you tell me which casing is that? thanks...
It's not a small box! It's the 1550g, the monster truck of pedals...

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What psu are you using? Can you explain your wiring for the power?

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Post by LED-man » Tue Feb 26, 2019 5:01 pm

Yamaha PA20 PA30 gives you 2x18V AC.
It’s external but 230V Ac input
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soup
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Post by soup » Wed Feb 27, 2019 1:25 am

Bamboombaps wrote:What psu are you using? Can you explain your wiring for the power?
https://www.jameco.com/z/ADU180100-AC-t ... 21216.html

for wiring see this page...

http://electro-music.com/forum/topic-20373-225.html

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LED-man
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Post by LED-man » Wed Feb 27, 2019 1:55 am

It’s better to use Full-wave rectifying,
I tested half wave (1x single AC) years ago, much more noisy.

Quote from Juergen.Haible:
Half wave rectifying is considered "not elegant", because it needs overly sized capacitors, and creates higher peak currents. But the more I think of it, the more attractive it is to simply use a single wall wart and just upsize the capacitors. We're talking of just a few cents more on caps here (and there's plenty space on the board) - at the benefit of a safe and easy way too hook it all up at the mains.
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Reese P. Dubin
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Post by Reese P. Dubin » Fri Jun 07, 2019 1:18 pm

Anyone know a mouser part# for the fuse blocks? I never use this sort of thing and cant seem to find the right ones.

Finishing one for a friend thats been on ice for about 8 years, and going the standalone transformer path.

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soup
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Post by soup » Fri Jun 07, 2019 11:48 pm

I was similarly confused looking for a part for a triple chorus but this worked...

576-64600001223

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Reese P. Dubin
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Post by Reese P. Dubin » Mon Jun 10, 2019 5:11 pm

thanks so much!

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Post by hububalli » Wed Jun 19, 2019 4:39 pm

Does anyone know the power consumption on 15v?

Want to stick it in my modular but I think this will be quite hungry!

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Post by wackelpeter » Fri Jun 21, 2019 12:47 am

hububalli wrote:Does anyone know the power consumption on 15v?

Want to stick it in my modular but I think this will be quite hungry!
Without digging too deep into the thread i found a Statement by Jürgen where he said that this should be a stand-alone box as it draws a lot of power... and your psu in your modular would have some hard time to handle that and will likely cause voltage Drops in your PSU-Output.

http://electro-music.com/forum/viewtopi ... c&start=25

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Post by LED-man » Fri Jun 21, 2019 12:59 am

It’s no problem to use this phaser in a 5U System, because we use NO cheap meanwell switching psus (which only have 500mA at the -15v rail.)
There’s a reason why you can order MOTM Panels for the Krautrock.
The module ask 50-75mA per rail.

https://www.dsl-man.de/display/MAIN/Jue ... er+in+MOTM
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Post by breadman » Fri Jul 19, 2019 9:13 pm

Just finished building and testing two of these that use those tasty Van Daal cases. (Picture below of the one that turned out nicer.) No huge issues with the builds or wiring though I had to spend some time tracking down funny little issues with the LFO/modulation section (cold joint hidden under some wire on one, first incandescent just not screwed in enough on the second) and even the schematic makes it a little unclear that two pins of the Osc Period pot are to be shorted. I used the Adafruit LDR's mentioned earlier in this thread and they seem to work awesome, though of course I don't have an original to compare.

Now to run a drum machine through one of them! :banana:

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Short little demo in 2-stage mode here:
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Post by megaohm » Sat Jul 20, 2019 4:02 am

LED-man wrote:It’s no problem to use this phaser in a 5U System, because we use NO cheap meanwell switching psus (which only have 500mA at the -15v rail.)
:tu:
Have built multiple Krautrocks in 5U and powered them all at once.
No problem.
www.MegaOhmAudio.com

Will work for pistachios

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Post by hamildad » Wed Jul 24, 2019 7:21 am

Need to try and fault find on my phaser once more as every time this thread gets bumped, I remember I have a complete but non functional one in the cupboard.

if I cant do it in August, its off to the dolls hospital in Clapton for an expert opinion.

aka the Badproducers workshop.
My Synth Instagram here * My Synth videos here
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Re: Jürgen Haible Krautrock phaser BUILD THREAD

Post by kagey3001 » Tue Jan 28, 2020 3:34 pm

Very late in on the build here, i know, I am currently sourcing all the parts I need for this, but my quest for the fabled ldr's has drawn a blank, i read that some of you have managed to source and use some adafruit ldr's. These seems to referenced from various sources, are these the same ldr's that people have had success from?

https://thepihut.com/products/adafruit- ... toresistor
https://www.digikey.co.uk/product-detai ... =315574036
https://www.mouser.co.uk/ProductDetail/ ... qKUw%3D%3D

If there are any other ldr's people have found to be a very close match, would very much like to hear, ideally UK

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the bad producer
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Re: Jürgen Haible Krautrock phaser BUILD THREAD

Post by the bad producer » Wed Feb 19, 2020 9:53 am

These are the original ones:

https://www.distrelec.de/en/light-depen ... p/16028961

I need some too, so doing a bit of cross-referencing

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