Author Topic: DECIMATOR II G-STRING advice  (Read 2833 times)

njkmonty

DECIMATOR II G-STRING advice
« on: November 09, 2018, 12:47:28 AM »
i have the "that 2181c" chip   
few years  go  i used a layout i found floating around , but it didnt sound right, was a bit fizzy so i gave up on it.
ive seen some with dual opamps and some with quads?
since then ive come across various threads indicating i might have used an old and incorrect schematic.
any one here who has actually built the decimator or g string, advise what the correct schematic layout is, as i want to give it one more chance?
thank you in advance! :)

Vlad123

Re: DECIMATOR II G-STRING advice
« Reply #1 on: November 09, 2018, 10:11:25 AM »

temol

Re: DECIMATOR II G-STRING advice
« Reply #2 on: November 09, 2018, 10:41:33 AM »
I've built one using this schemtic

T.

J0K3RX

Doesn't matter what you did to get it... If it sounds good, then it is good!

njkmonty

Re: DECIMATOR II G-STRING advice
« Reply #4 on: November 09, 2018, 05:28:02 PM »
thanks!

pinkjimiphoton

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Re: DECIMATOR II G-STRING advice
« Reply #5 on: November 11, 2018, 09:16:51 PM »
i can vouch for this guy's board and project, worked great right out of the gate once i learned to wrap my head around the weird way it hooks up...

the guitar goes to guitar in. guitar out goes to the input of your effects. return goes to the OUTPUT of your effects, out goes to your amp. its a brilliant piece of kit imho

you can run it in front of a fuzzface and it will still work right, cuz the guitar out is for all intents just a jumper from the guitar in jack.

https://guitar-electronics.eu/en_US/p/DECIMATOR-G-STRING-PCB/230

here's the build doc, and this one is good and works

https://guitar-electronics.eu/en_US/p/file/a36abf2f22e3e40508430446a234645f/Decimator-G-String-ENG.pdf
listen loud. blaze one first:
https://drive.google.com/open?id=0BzMJxNNgY3_yc0JNd0VqdmNIWEk

I stand for Truth, Justice, and the American Way. This Ain't It.
#RESIST
#FuzzyGoodness
#buildbridgesnotwalls

njkmonty

Re: DECIMATOR II G-STRING advice
« Reply #6 on: November 11, 2018, 09:18:43 PM »
Cheers thanks!! :)

Kennt82

Re: DECIMATOR II G-STRING advice
« Reply #7 on: November 12, 2018, 03:11:21 PM »
I built  the Version 1 using  Sabro's layout. There's a G- string addon and after I figured out the connection, like  Jimi says, it works really well.  But thanks for the v2  info, J0K3RX!   Did you make a pcb?

pinkjimiphoton

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Re: DECIMATOR II G-STRING advice
« Reply #8 on: December 04, 2018, 10:09:00 PM »
it took me forever to figure out how to patch it together, lol... guitar goes in, then guitar out goes to the fx chain in, guitar return is the output of the chain, and then the output goes to your amp or time/modulation. its a killer piece of kit. cuzza the way it works, if will even play nice with a ge fuzzface.
listen loud. blaze one first:
https://drive.google.com/open?id=0BzMJxNNgY3_yc0JNd0VqdmNIWEk

I stand for Truth, Justice, and the American Way. This Ain't It.
#RESIST
#FuzzyGoodness
#buildbridgesnotwalls

caspercody

Re: DECIMATOR II G-STRING advice
« Reply #9 on: December 15, 2018, 11:50:52 PM »
I finished this vero board last night.

I colored the +9 volts with red jumpers, ground with green jumpers, 1/2 voltage with blue jumpers, and jumpers are in white.

I created the vero board using Sabrotone's Decimator I layout. I have not built it yet, and if anyone sees anything that needs to be changed please let me know

Also, if you have anything for the G string portion, please let me know?

Also attached is BOM. The BOM is missing the 10K B Threshold pot.





« Last Edit: December 15, 2018, 11:53:06 PM by caspercody »

abakuzam

Re: DECIMATOR II G-STRING advice
« Reply #10 on: December 19, 2018, 03:43:52 PM »
i have the "that 2181c" chip   
few years  go  i used a layout i found floating around , but it didnt sound right, was a bit fizzy so i gave up on it.
ive seen some with dual opamps and some with quads?
since then ive come across various threads indicating i might have used an old and incorrect schematic.
any one here who has actually built the decimator or g string, advise what the correct schematic layout is, as i want to give it one more chance?
thank you in advance! :)

Hello,

i have built this pedal before, had a few issues while trying to get it to work, i posted some voltages after i get it to work, you may want to check this thread if you want to go with the same layout

https://www.diystompboxes.com/smfforum/index.php?topic=121425.msg1141319#msg1141319