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Author Topic: MP2 weird noise...  (Read 6084 times)

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rnolan

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Re: MP2 weird noise...
« Reply #15 on: Time Format »

Hey Kim, see my earlier post re my MP2 values, e.g. MP2 #3 had noise mod but not R913 and measured 194.8 and was noisy.  I replaced R913 and it measured 189.9 and noise reduced.  Seems you want to be as close to 190 as you can but not more and slightly less is better ?
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Studio Rig: MP2/MB1 > Eurorack UB2442FX-Pro > TC M-One XL > Behringer Truths (with Truth Sub) / QUAD ESL 63s
Live Rig: MP2/MB1 > Alesis Quadverb > Alesis Midiverb 4 > Yamaha AM802 > B200s/Carvin TS100/DCM200L > ADA Split Stacks/Mesa P112s

van Sinn

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Re: MP2 weird noise...
« Reply #16 on: Time Format »

@MJMP: Do you think a thin film [R913] resistor would created less noise?
Those do produce less spot noise, but whether this will matter in a HT plate regulator circuitry is :dunno: to me..
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Kim

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Re: MP2 weird noise...
« Reply #17 on: Time Format »

Ok, I should just go ahead and replace that R913 then, correct? 
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RIG OF FIRE:  ADA MP-2, Rocktron Xpression, Peavey Classic 60/60, Gator GPB-BAK-1 pedalboard, Korg DTR1000, Rolls MidiBuddy, Morley Tremonti wah, Saturnworks buffered splitter.
Mellotron/organ section:  EHX Mel9, EHX C9, EHX Soul Food, Boss LS-2, Morley Volume, Crate Powerblock.
Pair of 4x12 cabs:  each custom wired for both 2x12 guitar and 2x12 Mel9. UPDATED DIAGRAMS
HOME/STUDIO/COMBOS/STUFF:  ADA Quad Tube 150m, Crate G60XL, Saturnworks Saturn Fuzz, Boss CS-3.
GUITARS:  Jackson KE3-DiMarzio Breed/PAF Pro, Jackson KE3-DiMarzio Breed/PAF Pro, Silvertone P-bass, '70s Gretsch Dorado acoustic.

MarshallJMP

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Re: MP2 weird noise...
« Reply #18 on: Time Format »

As for noise don't think it will matter a lot.

@Kim,well maybe best you replace it.
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Kim

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Re: MP2 weird noise...
« Reply #19 on: Time Format »

Now we're getting somewhere. 

Tonight I did some more troubleshooting at rehearsal.  It's not the guitar, or cables.  Not even the preamp or fx processor for that matter.
The one thing in my rack that I couldn't check at home....the MT200.   :facepalm:   So I found that if I lowered the Presence on the MT200 to 0, the strange noise following a palm mute went away.  And raising that Presence all the way up resulted in that strange noise becoming a real squeal.   Must be bad tube(s) in the MT200, so I'll swap them out next rehearsal. 
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RIG OF FIRE:  ADA MP-2, Rocktron Xpression, Peavey Classic 60/60, Gator GPB-BAK-1 pedalboard, Korg DTR1000, Rolls MidiBuddy, Morley Tremonti wah, Saturnworks buffered splitter.
Mellotron/organ section:  EHX Mel9, EHX C9, EHX Soul Food, Boss LS-2, Morley Volume, Crate Powerblock.
Pair of 4x12 cabs:  each custom wired for both 2x12 guitar and 2x12 Mel9. UPDATED DIAGRAMS
HOME/STUDIO/COMBOS/STUFF:  ADA Quad Tube 150m, Crate G60XL, Saturnworks Saturn Fuzz, Boss CS-3.
GUITARS:  Jackson KE3-DiMarzio Breed/PAF Pro, Jackson KE3-DiMarzio Breed/PAF Pro, Silvertone P-bass, '70s Gretsch Dorado acoustic.

Kim

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Re: MP2 weird noise...
« Reply #20 on: Time Format »

Update:   different tubes swapped in the MT200 changed nothing.  More troubleshooting......So I checked my pedals (that I didn't bring home with me last time)  ::)  and there it was. Taking one pedal out of the equation cleared it up.  I'll deal with that over this weekend.

Really glad it's not the ADA stuff, but I will still change out that resistor that went a bit out of spec anyway.   Thanks for the help!  :wave: 
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RIG OF FIRE:  ADA MP-2, Rocktron Xpression, Peavey Classic 60/60, Gator GPB-BAK-1 pedalboard, Korg DTR1000, Rolls MidiBuddy, Morley Tremonti wah, Saturnworks buffered splitter.
Mellotron/organ section:  EHX Mel9, EHX C9, EHX Soul Food, Boss LS-2, Morley Volume, Crate Powerblock.
Pair of 4x12 cabs:  each custom wired for both 2x12 guitar and 2x12 Mel9. UPDATED DIAGRAMS
HOME/STUDIO/COMBOS/STUFF:  ADA Quad Tube 150m, Crate G60XL, Saturnworks Saturn Fuzz, Boss CS-3.
GUITARS:  Jackson KE3-DiMarzio Breed/PAF Pro, Jackson KE3-DiMarzio Breed/PAF Pro, Silvertone P-bass, '70s Gretsch Dorado acoustic.

rnolan

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Re: MP2 weird noise...
« Reply #21 on: Time Format »

Hey Kim, cool, glad you found the issue, which pedal was it ?
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Studio Rig: MP2/MB1 > Eurorack UB2442FX-Pro > TC M-One XL > Behringer Truths (with Truth Sub) / QUAD ESL 63s
Live Rig: MP2/MB1 > Alesis Quadverb > Alesis Midiverb 4 > Yamaha AM802 > B200s/Carvin TS100/DCM200L > ADA Split Stacks/Mesa P112s

Kim

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Re: MP2 weird noise...
« Reply #22 on: Time Format »

Hey Kim, cool, glad you found the issue, which pedal was it ?

Well, when I took the Mel9 out of the chain at rehearsal the funny business stopped.  But....here I am trying to replicate the problem at home again and coming up empty.  This is starting to really get on my tits here.   I brought all the pedals home and ran into both the QuadTube and the Crate G60XL with no problems.  FFS I can't keep dragging ALL my gear home and back to rehearsal, rinse and repeat twice a week.

Maybe some kind of electrical loop?  I have the Crate, Mel9 adaptor, and the Quadtube all plugged into the same power strip here at home.
At rehearsal the Mel9 adaptor is plugged into a power strip that is not shared with my rack gear.
Stan video'd the problem; if he'd send that to me or upload it somewhere I could show you guys what's going on.   
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RIG OF FIRE:  ADA MP-2, Rocktron Xpression, Peavey Classic 60/60, Gator GPB-BAK-1 pedalboard, Korg DTR1000, Rolls MidiBuddy, Morley Tremonti wah, Saturnworks buffered splitter.
Mellotron/organ section:  EHX Mel9, EHX C9, EHX Soul Food, Boss LS-2, Morley Volume, Crate Powerblock.
Pair of 4x12 cabs:  each custom wired for both 2x12 guitar and 2x12 Mel9. UPDATED DIAGRAMS
HOME/STUDIO/COMBOS/STUFF:  ADA Quad Tube 150m, Crate G60XL, Saturnworks Saturn Fuzz, Boss CS-3.
GUITARS:  Jackson KE3-DiMarzio Breed/PAF Pro, Jackson KE3-DiMarzio Breed/PAF Pro, Silvertone P-bass, '70s Gretsch Dorado acoustic.

Kim

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Re: MP2 weird noise...
« Reply #23 on: Time Format »

Here's the vid.
https://www.dropbox.com/s/b5xwhznxqnnbziv/VIDEO0082.mp4?dl=0

You can hear that noise just before the Reverb tails. 
« Last Edit: Time Format by Kim »
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RIG OF FIRE:  ADA MP-2, Rocktron Xpression, Peavey Classic 60/60, Gator GPB-BAK-1 pedalboard, Korg DTR1000, Rolls MidiBuddy, Morley Tremonti wah, Saturnworks buffered splitter.
Mellotron/organ section:  EHX Mel9, EHX C9, EHX Soul Food, Boss LS-2, Morley Volume, Crate Powerblock.
Pair of 4x12 cabs:  each custom wired for both 2x12 guitar and 2x12 Mel9. UPDATED DIAGRAMS
HOME/STUDIO/COMBOS/STUFF:  ADA Quad Tube 150m, Crate G60XL, Saturnworks Saturn Fuzz, Boss CS-3.
GUITARS:  Jackson KE3-DiMarzio Breed/PAF Pro, Jackson KE3-DiMarzio Breed/PAF Pro, Silvertone P-bass, '70s Gretsch Dorado acoustic.

MarshallJMP

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Re: MP2 weird noise...
« Reply #24 on: Time Format »

I wanted to open it and I had to ask permission to look at it?? Is this normal?
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Kim

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Re: MP2 weird noise...
« Reply #25 on: Time Format »

I wanted to open it and I had to ask permission to look at it?? Is this normal?

Sorry I posted wrong link.  Try it now.    :)
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RIG OF FIRE:  ADA MP-2, Rocktron Xpression, Peavey Classic 60/60, Gator GPB-BAK-1 pedalboard, Korg DTR1000, Rolls MidiBuddy, Morley Tremonti wah, Saturnworks buffered splitter.
Mellotron/organ section:  EHX Mel9, EHX C9, EHX Soul Food, Boss LS-2, Morley Volume, Crate Powerblock.
Pair of 4x12 cabs:  each custom wired for both 2x12 guitar and 2x12 Mel9. UPDATED DIAGRAMS
HOME/STUDIO/COMBOS/STUFF:  ADA Quad Tube 150m, Crate G60XL, Saturnworks Saturn Fuzz, Boss CS-3.
GUITARS:  Jackson KE3-DiMarzio Breed/PAF Pro, Jackson KE3-DiMarzio Breed/PAF Pro, Silvertone P-bass, '70s Gretsch Dorado acoustic.

MarshallJMP

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Re: MP2 weird noise...
« Reply #26 on: Time Format »

Ok got permission so ...  :lol:
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Kim

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Re: MP2 weird noise...
« Reply #27 on: Time Format »

What do you make of that?  Could be just that resistor out of spec?  I'm ordering some new ones this weekend...
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RIG OF FIRE:  ADA MP-2, Rocktron Xpression, Peavey Classic 60/60, Gator GPB-BAK-1 pedalboard, Korg DTR1000, Rolls MidiBuddy, Morley Tremonti wah, Saturnworks buffered splitter.
Mellotron/organ section:  EHX Mel9, EHX C9, EHX Soul Food, Boss LS-2, Morley Volume, Crate Powerblock.
Pair of 4x12 cabs:  each custom wired for both 2x12 guitar and 2x12 Mel9. UPDATED DIAGRAMS
HOME/STUDIO/COMBOS/STUFF:  ADA Quad Tube 150m, Crate G60XL, Saturnworks Saturn Fuzz, Boss CS-3.
GUITARS:  Jackson KE3-DiMarzio Breed/PAF Pro, Jackson KE3-DiMarzio Breed/PAF Pro, Silvertone P-bass, '70s Gretsch Dorado acoustic.

MarshallJMP

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Re: MP2 weird noise...
« Reply #28 on: Time Format »

It's hard to hear ,I hear something but it's very short.So go ahead and replace the resistor and see what happends. It will go in value anyway so at some point you will have to change it.
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Kim

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Re: MP2 weird noise...
« Reply #29 on: Time Format »

New resistors arrived today.   :whoohoo!:

Funny though...the 240k ohm 1/2 watt ones are the same physical size as the 3Mohm 1/4 watt ones. The package says they are 1/2 watt though.

I'll bring my rack home tomorrow night so sometime this weekend I'll get on that.
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RIG OF FIRE:  ADA MP-2, Rocktron Xpression, Peavey Classic 60/60, Gator GPB-BAK-1 pedalboard, Korg DTR1000, Rolls MidiBuddy, Morley Tremonti wah, Saturnworks buffered splitter.
Mellotron/organ section:  EHX Mel9, EHX C9, EHX Soul Food, Boss LS-2, Morley Volume, Crate Powerblock.
Pair of 4x12 cabs:  each custom wired for both 2x12 guitar and 2x12 Mel9. UPDATED DIAGRAMS
HOME/STUDIO/COMBOS/STUFF:  ADA Quad Tube 150m, Crate G60XL, Saturnworks Saturn Fuzz, Boss CS-3.
GUITARS:  Jackson KE3-DiMarzio Breed/PAF Pro, Jackson KE3-DiMarzio Breed/PAF Pro, Silvertone P-bass, '70s Gretsch Dorado acoustic.
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