Marshall Jcm 2000 effects loop noise

[BossRoss]

I recently bought a jam 2000 and have been using a tube overdrive and a tc flashback pedal through the front of my amp. It sounded ok so I heard that the efx loop would help clean up some of the hum but when I plugged it in it became really bad. Any idea what would Cause this issue


Sent from my iPhone using Tapatalk

 

[Kamanda~SD]

Re: Marshall Jcm 2000 effects loop noise

So are you running the pedals in the loop? Or running a straight patch from send to return?

Either way, contact cleaner is always a good start.

 

[devastone]

Re: Marshall Jcm 2000 effects loop noise

The overdrive goes in front, the delay goes in the loop.

 

[BossRoss]

Re: Marshall Jcm 2000 effects loop noise

I get him from both pedals in the loop


Sent from my iPhone using Tapatalk

 

[BossRoss]

Re: Marshall Jcm 2000 effects loop noise

I get him from both pedals in the loop


Sent from my iPhone using Tapatalk

I meant to say hum from both pedals.


Sent from my iPhone using Tapatalk

 

[Kamanda~SD]

Re: Marshall Jcm 2000 effects loop noise

devastone is right in terms of order.

What kind of tube overdrive is it?
Do you have a power supply or battery?
Did you double check patch cables?

 

[BossRoss]

Re: Marshall Jcm 2000 effects loop noise

So are you running the pedals in the loop? Or running a straight patch from send to return?

Either way, contact cleaner is always a good start.

Patch from send to return



Sent from my iPhone using Tapatalk

 

[BossRoss]

Re: Marshall Jcm 2000 effects loop noise

devastone is right in terms of order.

What kind of tube overdrive is it?
Do you have a power supply or battery?
Did you double check patch cables?

It is an old Johnson Tub overdrive and use batteries. I did use a few different cables. All cables sound clean through front of amp. It just really dirty through the effects channel


Sent from my iPhone using Tapatalk

 

[Kamanda~SD]

Re: Marshall Jcm 2000 effects loop noise

Definitely get some contact cleaner in there first, could be some dust or whatnot not helping your cause.

 

[BossRoss]

Re: Marshall Jcm 2000 effects loop noise

Definitely get some contact cleaner in there first, could be some dust or whatnot not helping your cause.

Ok will do. Will I need to take the back cover off or can I just spray through the screen and inputs?


Sent from my iPhone using Tapatalk

 

[devastone]

Re: Marshall Jcm 2000 effects loop noise

And don't run the overdrive in the loop!

 

[Kamanda~SD]

Re: Marshall Jcm 2000 effects loop noise

Ok will do. Will I need to take the back cover off or can I just spray through the screen and inputs?


Sent from my iPhone using Tapatalk

No need to spray through the screen, just spray into the send and return jacks, then plug a cord in a few times.

 

[Gtrjunior]

Re: Marshall Jcm 2000 effects loop noise

I usually spray the jacks and work them in and out a few times. I’m not sure that spraying directly into the hole is the best way to do this.