Marshall Jvm 210h ground loop?

[Slangindank]

My rig is very simple,

Ibanez rg7321 emg 81-7 >

Boss ns-2 >

Marshall jvm 210h >

Krank krankenstein 4x12

All powered by a monster power conditioner.

When I plug my guitar straight into the amp, with my
Guitar volume all the way down, it is dead quite. But
when I add the ns-2 to the same situation it buzzes and
hums prefusely.

Ive tried different pedals such as a tubescreamer and
dunlop crybaby wah, seperately and all together but its
the same result.

Since im dealing with so much gain, I absolutely need theNs-2. So, I need to know if its my amp.

 

[155]

I have a similar set up and sounds like you have a bad ns-2? Im using mine in front of the amp btw..

 

[slaktarn]

How are you powering the NS2?
Try a battery and if that helps it means the power supply is the reason for the buzz.

 

[Mudder]

If it doesn't buzz with no pedal, then buzzed with pedals, it's not the amp. When you add pedals you introduce places for stray interference to get into the system. It doesn't matter what pedal you use? They all buzz? Sounds like something is up with either the cables or power source for the pedals.

 

[sinfish]

It's in the cords

 

[Slangindank]

Ive tried batteries and 3 different sets of cables. There all monster cable. The power supply for my pedals is a 1 spot walwart plugged into the conditioner. I had a krank krankenstein 100 watt head and i never had this problem using the same cables, pedals, guitars everything. The marshall was used and the previous owner changed all of the preamp tubes to JJ Teslas.

 

[ibanez4life SZ!]

I've heard of people having noise related issues with the 1-spot...maybe that's your culprit?

Eric

 

[JerryP]

It's not the amp. Are you using a 4 cable setup to run the NS2? If you are you could be creating a ground loop. There are different ground potentials thoughout an amp and when you connect the input ground to the loop ground you get hum on some amps.
Jerry

 

[Slangindank]

I tried the 4 cable setup, it didnt work. I could play under the gate without opening it but at .5 volume of what the amp was set at. It was quite odd. I'll try my friends 1 spot to see if i have a shot one.

Heres a quick vid of the problem.

youtube.com/watch?v=gGaQ3QJKLjI

Im on my phone couldnt link the vid sorry.

 

[university81]

after seeing the video, and from what you said it's not the cables or the power supply (as you tried a battery too)

I'm thinking the input/output jack or the actual ns-2 has broken down,

does it make that sound with any pedal hooked up before the amp? or just the ns-2 ?

my korg tuner died a similar death, and i thought it was cables, but it was just the output jack was seriously borked for some reason,

try and borrow another noisegate/ns-2 to see if makes a similar noise hooked up in the same fashion

 

[Slangindank]

Its not the ns-2 as the problem persists with any pedal. I swapped my marshall with my other guitarists triple rec and there is no buzz at all. I used the same power supply, cables, pedals and guitar. So, now I think its the marshall thats causing the problem.

 

[university81]

this'll sound silly but have you tried the amp in a different location? through different power outlets?

i really can't say what it is, especially if the amp is fine when plugged straight in, but when you add pedals it buzzes uncontrollably,

and if the pedal order makes no difference at all, i'm stumped

 

[kirk]

if your plugging a guitar straight in and have no problem til you introduce a pedal in the circuit ,then it is definitly not the amp,most pedals are designed with the correct impedance to allow them to be put into the front of a guitar amp,alot of pedals also have the gain boosted to compensate the signal loss of a chain,so maybe your still haveing a signal loss issue try a really short cord,put the pedal right on top of the amp and see if that helps at all ,but if you use a wah and it still does it im stumped as well .When you plug your axe straight in and run the volume up on it but mute the strings with your hand do you have the buzz?if so then it might be the guitar with the ground problem,try a different guitar if its still there could be the amp alright those marshall jacks are crap and its probably has a leg with a bad solder joint on the ground easy fix

 

[Slangindank]

When I turn the volume up on the guitar I get feedback from all of the gain. Ive tried it with 6 different guitars passive and active and its the same result. Im gunna check the input jack of the marshall.