Someone with same unanswered problem...

[Rkorn]

Hi,
like subject says, i found someone with the same problem as me.
All of this because I don't have the time to take the amp to the store, and i'm still trying to find an answer for this before i get months without the amp...

http://www.youtube.com/watch?v=34xNHaWEXUI&feature=related

listen to this, my Mark V does exactly the same noise. with the guitar plugged in is the same. When I turn the guitar on and play the noise obviously disappears or at least, it is inaudible.

Any help?
is it the electricity in my garage rubbish? That is something i can get someone to fix
is it a problem with the amp?? (back to Boogie - months waiting)
Bad tubes? (also back to Boogie and also months waiting)

PS: my friends F-100 doesn't do this neither did my 6505 212 combo

 

[screamingdaisy]

Sounds like normal 60 cycle hum. If it never changes it's most likely from your wall power. If it changes as you move around it may be from another source and being picked up by your pickups and/or a poorly shielded cable. Fluorescent lighting and computers being two well known sources, but if you have an electrical panel in your garage it could emanate from there as well.

But, since you said it's there whether your guitar is plugged in or not, it's most likely from the wall power.

My Dual Recto does the same. I'd shoot a video to show you, but my internet connection has been really slow this week.

I'm not an engineer, but the way I understand it is that some amps have more filtering on the power section than others. This helps filter out noise, but also alters the response of the amp. The more filtering, the less noise and the stiffer the response.

 

[ifailedshapes]

Ebtech Hum X
www.ebtechaudio.com/humxdes.html

 

[yeti]

onstage, what does that little bit of noise matter? not a lot.

playing in a much quieter setting, it can drive you insane.

 

[Rkorn]

I took the amp and cab home. here, with stable current and proper ground the amp is very quiet. It seems the big problem is indeed the electricity and ground of my rehearsing room...

The only noise now is when going from On to Standby and from Full/Variac Power to Off.
But these noises are normal I think. Chunk when going to standby (almost like changing Channels) and this little noises when turning Off (I guess these are all the things inside shutting down).

 

[screamingdaisy]

Chunk when going to standby (almost like changing Channels) and this little noises when turning Off (I guess these are all the things inside shutting down).

Mine does the same thing.

 

[Rkorn]

I guess everything is like it should be on this amp. I'm glad!!! If All of these were real problems i guess it sound awsome nonetheless

 

[jb's 52]

I took the amp and cab home. here, with stable current and proper ground the amp is very quiet. It seems the big problem is indeed the electricity and ground of my rehearsing room...

The only noise now is when going from On to Standby and from Full/Variac Power to Off.
But these noises are normal I think. Chunk when going to standby (almost like changing Channels) and this little noises when turning Off (I guess these are all the things inside shutting down).

Yep, always varies from place to place. Might wanna check extension cords too.
We were having an issue with our mics shocking us at various times. I bought an
outlet tester.

http://www.amazon.com/GB-Electrical-GFI-3501-OUTLET-TESTER/dp/B00170KUPC

Found that the outlet was grounded and fine, but the extension cord was missing the
ground prong...didn't really need a tester for it, but I didn't notice the missing prong
without the tester telling me so.

 

[lesterpaul]

dimmer switches are tools of Satan as well....Decimator...best $$ I have spent in years
**** you,dimmers!! :evil: