Drumulator Hum and noise

[dorl]

Hello, sorry for barging in with a question but I just got my drumulator and it is quite noisy.

I get this kind of HUM and and buzz i go crazy. i mean it also comes from the single outputs (from the toms I cant hear it but maybe because it goes through the filters and they filter it out??)

also the metronome is really noisey i mean when i plug the metronome out its really really noisy, any idea?

is it the powersupply? or something else?

thanks so much! i really was looking for so long for a good midi drumulator and till i got one its not working good

d

[bedouin]

You sent me a message through YouTube I didn't get a chance to respond to.

The pictures I'm finding on-line of the Drumulator opened up don't seem to be like mine.  I haven't had it open in a long time though.

In mine there was a series of black, inch-high, and  arched either resistors or capacitors -- I'm not sure which.  When they were touching each other there was hum; when not touching each other, it was fine.  Your milage may vary. 

[dorl]

Helllo , thanks for reply.

Ill upload some photos just to be more clear.

There is a buzzing sound and a high pitch ring. from mix out and all the other outputs besides the toms which are more or less clear! (yeah considering its a 2something old)
the metronome out has A LOT of buzz to it, and the rest has both a buzz and the ringing.


 i think i know what u mean by the spider resistors bt  i didnt see any problems with them.

http://farm3.static.flickr.com/2714/4422438876_a6eaac7269_b.jpg
http://farm3.static.flickr.com/2732/4422438704_0dee583a99_b.jpg
http://farm5.static.flickr.com/4022/4422438456_1d44777ece_b.jpg
http://farm3.static.flickr.com/2766/4422438206_7741b9f992_b.jpg

uploaded some photos

dor

[bedouin]

Yours doesn't have them either . . .

Maybe I have an old revision?  Who knows.

[dorl]

do you have maybe a photo of yours?

[bedouin]

I looked for one but I couldn't find it, and not quite feeling like opening it up

[dorl]

understandable anyway i think i return my drumulator and try to bid on an SP12 Turbo, know its not really the same but its another machine i was craving for

[bedouin]

Until then, I would just open it up while turned on.  Be careful not to touch capacitors, and push down on some chips -- see if any connections are corroded.  Wiggle things around and see what makes it go away.

[dr.c]

I fixed hundreds of them, but never seen one like that with daughter boards.

Scared out, I run away....

[bedouin]

I think that's his MIDI upgrade. 

Good to know you can fix them though.  Mine will likely need a tuneup in the future.

[ambivalent]

http://cgi.ebay.de/E-mu-Drumulator----%3D-KULT-%3D-_W0QQitemZ330408303747QQcmdZViewItemQQimsxZ20100227?IMSfp=TL100227134005r35116#ht_648wt_1167

Did you buy it from this auction? If not, the seller might be able to help with schematics for the sound expansion and MIDI upgrade.

[dr.c]

Please verify the power supply voltages first.
As well, the caps in the red frame are often sensitive to torsion, etc...

I changed it :

go to : http://cjoint.com/?dntN2lyjfk

Move a bit the caps, bend them, see if there is a change.

Do you need the diagrams ?

[dr.c]

MIDI Mod ! It looks like it !

My God...
The original ones from E-Mu were not even one inch by side and there was the OS Eprom to change, that's all !

Geee....

[Dimensional Space]

The hum problems sounds like a bad power supply.  As far as the noise goes... Pick up a Behringer Denoiser.  Wow, what a difference.  I hate Behringer stuff but this unit is no joke.  I use it on the Sp1200 and it really cleans up the ambient hiss and rounds out the sound too like a compressor.   I use the Expander sparingly also which helps round out kicks etc. .     I think I will eventually replace it with a Presonus ACP-88 when I pick one up again.   But anyone that doesn't like the SP-12/1200 noise should pick a Denoiser.   Recommended.

[Elmbeatz]

The hum problems sounds like a bad power supply.  As far as the noise goes... Pick up a Behringer Denoiser.  Wow, what a difference.  I hate Behringer stuff but this unit is no joke.  I use it on the Sp1200 and it really cleans up the ambient hiss and rounds out the sound too like a compressor.   I use the Expander sparingly also which helps round out kicks etc. .     I think I will eventually replace it with a Presonus ACP-88 when I pick one up again.   But anyone that doesn't like the SP-12/1200 noise should pick a Denoiser.   Recommended.

Thanks for the tip!
Which exact unit are you talking of?