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today> Modulator ESP Adventures In Sound

 Forum index » DIY Hardware and Software
NeinOhNein 909 Snare Clone Problems
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redbuttonplayer



Joined: Apr 01, 2021
Posts: 6
Location: italy
PostPosted: Sat May 14, 2022 11:34 pm    Post subject: NeinOhNein 909 Snare Clone Problems Reply with quote  Mark this post and the followings unread
Hi everyone
I have finished building the NeinOhNein snare with noise module. I have used an official PCB bought online. It works, but I find three issues:
    - overtone always present in the background
    - tone pot seems doesn't to work
    - white noise is always present in the background adding snappy
How can I check what the problem Is?
I have checked many times connections and values without finding anything wrong.
I really appreciate any help you can provide.

IMG_20220515_083128.jpg
 Description:
Assembled NeinOnNein Snare + white Module PCB
 Filesize:  1.31 MB
 Viewed:  69 Time(s)
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IMG_20220515_083128.jpg
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redbuttonplayer



Joined: Apr 01, 2021
Posts: 6
Location: italy
PostPosted: Wed May 18, 2022 5:37 am    Post subject: Reply with quote  Mark this post and the followings unread
Ok, maybe I have solved the problem. It seems that Q1 and Q2 have pinouts inverted.
I replaced ZTX1051a with 2N3904 like say BOM sheet, but the suggestion is more ambiguous; it says "2N3904 should work if you cannot find ZTX1051! The For people that will build this module in the future ZTX1051a and 2N3904 have emitter and collector inverted. Keep attention!
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