[solved] Bass Drum BUZZZ

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Re: Bass Drum BUZZZ

Postby beeb » Aug 24th, '16, 17:20

peskado wrote:Maybe this problem same with MT?

if you're referring to the volume of the mid-tom, then the latest firmware fixes it!
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Re: Bass Drum BUZZZ

Postby peskado » Aug 24th, '16, 18:47

beeb wrote:
peskado wrote:Maybe this problem same with MT?

if you're referring to the volume of the mid-tom, then the latest firmware fixes it!

Yes, I'm referring to the volume of the mid-tom :)
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Re: Bass Drum BUZZZ

Postby e-licktronic » Sep 1st, '16, 13:08

Dear Diyer,

Have good news.
After lot of cutting traces, wiring, solder.... :? we find a solution to make this "Buzz" off.
First cut trace between IC11 pin2 and VR4 pin1 like follow:
Image

Then solder both Q12 and Q6 emitter together out of the PCB.
Solder a wire between Q12, Q6 emitter and IC11 pin2 then between Q12, Q6 emmiter and VR4 pin1:
Image

It seems that this trace is to close to the ground plane.
Let me know if it works for you. ;)

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

Postby xone » Sep 1st, '16, 14:06

good to see some progress being made on fixes. can you post another pic of that fix? for some reason it's hard to see what's going on from that one.
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Re: Bass Drum BUZZZ

Postby housedet@comcast.net » Sep 1st, '16, 16:46

Hello Vincent, this question has to do with me taking care of the issue before I begin my assembly next week. Instead of cutting the trace at IC11 pin 2, could I just not place a socket in that hole and bend the pin out to solder the wire. Then when I'm installing Q6 and Q12 I could use a two pin socket for each and just leave the emitter out of the board and solder them together along with the wire from IC11, pin 2. This way I would only need to cut one trace, pin 1 of VR4. I'm just looking at it in a way of cutting into the board as little as possible, because, if for some reason I need to put it the original way, only one small trace will be cut. I could be way off on this idea, it just looked like another way of approaching the problem. Thanks for all you've done and continue to do.

Danny S.
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Re: Bass Drum BUZZZ

Postby Data Jam » Sep 1st, '16, 18:18

i would also appreciate 1-2 more pics, i don't want to mess something up ;)

and also to make sure, the trace between IC11 pin2 and VR4 pin1, i cut on the component side, right ?
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Re: Bass Drum BUZZZ

Postby drifter7508 » Sep 1st, '16, 19:58

Guys, follow the trace on the pic above and you will understand how to bypass the path that is cut ;-)

But, I'm also wondering on which side to do the cuts?
How deep is enough and can i damage something if I go "too deep"?
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Re: Bass Drum BUZZZ

Postby decoder303 » Sep 1st, '16, 20:29

thx a lot for the effort, gonna try this "bassdrum buzz be gone" mod tomorrow and will give some feedback here if it worked. :mrgreen:

P.S.: it should be on the "component side", red is normally the top layer in eagle
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Re: Bass Drum BUZZZ

Postby e-licktronic » Sep 2nd, '16, 02:47

decoder303 wrote:P.S.: it should be on the "component side", red is normally the top layer in eagle


Yes it is ;)

Best regards,
e-licktronic
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Re: Bass Drum BUZZZ

Postby FactoryDefault » Sep 2nd, '16, 05:06

It works!

The hardest part was de-soldering IC11. I used half a dip16 socket to put it back on the board, with pin 2 sticking out.

I considered de-soldering VR5 to make it easier to remove the transistors but was able to remove solder from the accessible legs then do the rest from the other side of the board.

Be Careful! I burned my fingers while removing the transistors and melted a couple of spots on the VR posts...

Here are some photos. iPhones are hard to focus that close. Excuse the cat hairs :D

Image

Image
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