Harley Benton - NG-100 Noise Gate  [schematic]

All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.
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lars-musik
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Post by lars-musik »

This is my first attempt on tracing a pedal. I chose this one (in case you wonder why to trace a pedal for 24,99) because it

a) has a really great swell sound (I am unhappy with my Slow Gear clone and even unhappier with the three failed attempts to get a Paia Gator working properly with my guitar setup: Not to mention the three huge and the one double sided EHX Attack Decay board I spend weeks on and I yet never find the right settings),

b) it is terribly ugly so it needs re-housing in any case,

c) it is not true bypass and that could need some re-doing

d) I might learn something (about pedals in general and my limits of patience in special)

e) it is cheap. So I dare to desolder things if neccessary

f) I somehow got bitten by the DIY bug and an ugly non DIY pedal on my board nags me

g) did I mention that this is the only pedal that creates auto-swell sounds effortless in any pedal combination?

So this is how far I came. I am very sure there are lots of mistakes, it is very far away from all good practice in schematic drawing (as said, this is my first. I don't have any electronic background aside from hobbyistic enthusiasm).

Is there somebody knowledgeable willing to have a look? Maybe point out all the parts not needed if converted to true bypass? I know that most of you work with eagle but I never really got a grasp on it and I am very happy with diptrace. I'll gladly share the layout/schematic files if it is any help. Is anybody willing to re-draw the files into something legible?

Or maybe this even is a clone of something someone would recognize (although I think I really looked at all the usual suspects)
I am going to desolder the diodes for identification later on. Maybe some won't be needed anyway.

My first question for a start: Why is pin 1 (according to the datasheet not connected) connected to pin 6?

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armdnrdy1
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Post by armdnrdy1 »

The JPEG schematic is very low resolution. (unreadable)

Try to upload a link to a PDF or higher resolution JPEG.

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lars-musik
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Post by lars-musik »

I'm sorry. I thought you could just right-click and open the full res photbucket image.
PDF is attached.
Here you should see all images in full resolution:
https://s1244.photobucket.com/user/lars ... rary/NG-10
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NG-100_v0-1.pdf
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