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> Ground Issue
Muris Varajic
post Dec 25 2007, 05:21 PM
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I had this light ground noise every since I changed Mesa 2:50 with Mesa 2:90.
I thought it's caused by old cable/s but I was wrong. smile.gif
Anyhow,I have 6HE rack and positions were these:
-Prophesy 2HE at the bottom
-Mesa 2HE right above it
-1HE free to give space for cooling,Mesa uses to get really hot,11 tubes biggrin.gif
-and Furman Power Conditioner 1HE at the top.

And few days I was talking with a friend of mine(el.guy) and I mentioned this to him,
told him that I've have this "ground" only with 2:90 while 2:50 was fine.
He said "You fool,2:90 has lot bigger power amp section,bigger magnetic field,
move it from Prophesy as much as you can" biggrin.gif

And so I moved Mesa 1HE above leaving 1HE between Prophesy and Mesa,
and ground noise was gone cool.gif

This surprised me the most cause I've seen power-amps and pre-amps in many racks,
one to another,no spacing... blink.gif

Looks like it has a much to do with power of amp,finding best spot for each component,
maybe mixing brands as well....

Any similar experiences guys?


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Andrew Cockburn
post Dec 25 2007, 06:55 PM
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I've never had a similar problem, but you have much nicer gear than me Muris smile.gif

Thats a great tip though, one I'll pack away for the future biggrin.gif


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Ivan Milenkovic
post Dec 25 2007, 08:03 PM
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Never had no rack problem, because I don't own racks smile.gif But had some noise problems with cables and power cables. They do tend to pickup noise from electronic equipment. I have put two of mine fx loop cables over my amp and it had some noise in the amp. I guess the cables pickup the electromagnetic waves that amps radiate.
Good question regarding racks in other setups. My guess is that people who put these racks know similar issues and trial&error every combination (like you have), and come up with no noise setup in the end. Or maybe they just put those racks for photographing only and little chinese guy is doing all the computer work behind the scene smile.gif

This post has been edited by Milenkovic Ivan: Dec 25 2007, 08:04 PM


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Muris Varajic
post Dec 26 2007, 12:01 AM
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laugh.gif

Well said Ivan,little chinese guy with laptop,that's what I need actually biggrin.gif


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