Let's Get Technical > Troubleshooting Problems
MP-1 got Noisy...
rabidgerry:
Well so much for the clips, my MP1 has a problem :dunno:
Making some strange "earth fault" style noise.
MarshallJMP:
That's why we are here to solve problems ;D
Send me an email with some details.
rnolan:
Hey RG, knowing you, you've checked all the usual culprits (leads, isolated the MP-1 to be sure etc) but just checking/asking.
rabidgerry:
oh yeah RN, I know it's just the MP1 as my other preamps are fine.
Strange, it's like an earth fault sound trying to compete with the proper sound. I actually forgot I had this issue a while ago but I got distracted and since I haven't played my MP1 in a while I forgot it was still happening. I recently had the idea to allow me to switch preamps using a footswitch in my home studio setup which is why I got back on the MP1 and it was then I noticed.
I'll make a clip MJMP when I get home and let you hear it. Bear in mind I last did the MDRT and noise mod to the MP1. I never quiet finished the noise mod as I still have some electrolytic caps to replace on the tube board.
rnolan:
Hey RG, yeah I figured, your pretty thorough :thumb-up: . My smell (for what it's worth) is it's input jack(s) related (hey don't ask me why.... :dunno: it's a feeling I guess). Unless there are dependencies on the tube board because of the noise mod you've almost finished (and I doubt it :dunno: ).
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