[solved] Bass Drum BUZZZ

Discuss Nava construction and related issues

Re: Bass Drum BUZZZ

Postby e-licktronic » Aug 22nd, '16, 14:24

New test with a laboratory power supply but buzz still there :cry:

Best regards,
e-licktronic
Best regards,
e-licktronic
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Re: Bass Drum BUZZZ

Postby drifter7508 » Aug 22nd, '16, 17:34

Oh. :-/ Thx for keep on trying.

Also the snares noiselevel is the second thing to fix. :-)
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Re: Bass Drum BUZZZ

Postby redstorm » Aug 24th, '16, 07:33

So, as the IC11A is a half of M5218L IC..
Maybe it's also worth looking at another part of the circuit with IC11B?
I would suggest try to disconnect ACCENT_BD from opamp and short C89,
so the opamp IN+ would be connected to GND, and check if the noise is still there.
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Re: Bass Drum BUZZZ

Postby another_universe » Aug 24th, '16, 11:54

Have anyone tried to solder all metal film resistors instead carbon and low esr capacitors instead those in BOM ? Could it be one of reasons to fix bass drum buzz ? Looking for answers :)
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Re: Bass Drum BUZZZ

Postby richardlawson1489 » Aug 24th, '16, 11:59

I found all right.
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Re: Bass Drum BUZZZ

Postby another_universe » Aug 24th, '16, 12:13

could you confirm that in your Nava bass drum section all resistors is metal film and capacitors low esr and no any buzz at full volume.
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Re: Bass Drum BUZZZ

Postby redstorm » Aug 24th, '16, 13:22

>Have anyone tried to solder all metal film resistors
I will try that when i start to assemble the BD circuit / section, as i have all metal film resistors besides the 10k ones.
(Only carbon 10k were available at the time of the first tayda order, but i have already ordered metal film 10k, waiting them now)
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Re: Bass Drum BUZZZ

Postby peskado » Aug 24th, '16, 14:03

Maybe this problem same with MT?
I checked ALL parts in my BD section
Tried a lot combination
Tried disconnect power from other sections(Sounds) no changes.
Maybe just need increase BD level in firmware and it will increase difference between buzz and BD sound
Thank you for layouts, want check it soon, maybe couple extra fresh eyes could find something)
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Re: Bass Drum BUZZZ

Postby another_universe » Aug 24th, '16, 14:06

Hope you will get good results! I also want work with better components, but already bought carbon resistors, but anyway would buy metal if would know about better results :) more comments please ! huh
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Re: Bass Drum BUZZZ

Postby peskado » Aug 24th, '16, 14:39

another_universe wrote:Hope you will get good results! I also want work with better components, but already bought carbon resistors, but anyway would buy metal if would know about better results :) more comments please ! huh

In my Nava all resistors metal film
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