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[rabidgerry]

Yes RG I did listen to the clip. Night and day difference!!! Good work

  Totally man, and I just recorded that using my phone held in front of a speaker cab.  Very pleased with the outcome!

I been reading up on these isolation transformers.  Still don't really understand how they do what they do.  I read that they actually attach boats to isolation transformers to stop them corroding whilst tied up in docks.  I dunno what the hell that's all about but hey!  Works form ground loops and galvanic corrosion.

[MarshallJMP]

Isolation transformers are used on boats for safety reasons and also to prevent galvanic corrosion.

Here's more info about galvanic corrosion  https://en.wikipedia.org/wiki/Galvanic_corrosion

[rabidgerry]

Isolation transformers are used on boats for safety reasons and also to prevent galvanic corrosion.

Here's more info about galvanic corrosion  https://en.wikipedia.org/wiki/Galvanic_corrosion

Oh I know, I read that article when I stumbled upon that, I still don't understand that though as a lot of that jargon means nothing to me. 

When a ground loop is broken, where does the ground go?  Into the transformer?  Then the signal comping out of the transformer, the seperated signal, has no ground, so how come there is no noise from the lack of a shield? 

[MarshallJMP]

Galvanic corrosion is when you attach 2 different metals too each other and put them in a neutral elektrolyte then you will get a voltage difference in these 2 metals so one metal will have a higher potential that will break down this metal quicker then other. Like I said explanation in a nutshell and not 100% accurate.

As for the ground,well in your case on primairy side you have the ground of the GT-5 and on the secondairy side you have the ground of the preamp.The way an isolation transformer works is that in stead of flowing current through the wire you get a flow through a magnetic field so there's no actual connection between the 2 sides.

[rabidgerry]

@ MJMP

ahhhhhhhhhhh "black magic" then 

Yes these things are complicated as I can see from even your basic explanation.

[MarshallJMP]

yes you could call it black magic 

[rabidgerry]

Update: (I know this thread has mutated from Powerconditioners to breaking ground loops but hey!)

Played three nights in a row, traveled 742miles, used the Art Clean Box II at every show!

Result?  I had a quieter rig than the guy from the band we were touring with (who had two huge framus heads and a tube screamer and some fancy expensive modualtion unit I can't remember the name off).

His rig was buzzy and noisey, my rig....................silent!

[MarshallJMP]

Great!

[Harley Hexxe]

Isn't that a great feeling?

[rabidgerry]

yes it is indeed.  The ground loop was main noise artifact that I had to get rid off.  And killing it left me with the level of noise I would have minus the ground loop, which turns out to be little to none!!  Meaning all the time spent making good cables for myself and shielding guitars has paid off.

The dude in the band we were touring with, his rig was badly affected by lights from what I could hear.  He had the other kinda noise (not hum but the sorta buzz you get from like emf).  I didn't 

[MarshallJMP]

Well you learned so much you could start a business in optimizing gear 

[rnolan]

Good news RG  , so what sort of PUs was the other guy using ?  And all the good work you did with cables and shielding etc is always worth it.

[rabidgerry]

hmmmmm I dunno Richard.  He had a Jackson, that's all I remember.

In this pic you can see his guitar.  No idea about the pups.  Could be the stock ones.  MJMP will know about the guitar or someone else who knows Jackson stuff, Soloist perhaps?
http://metal-on-metal.com/wp/wp-content/uploads/2015/01/Risen_Prophecy_live_11.jpg

No idea why he was getting noise.  Really nice fella.  Playing with that band in Ireland for another three dates at the end of the month as well!!!  Can't wait to loose weight via energetic stage performance yet again lol  Lost 4 pounds this weekend!  Not that I'm fat mind you.

[MarshallJMP]

Could be a soloist x series ,these usually come with duncan designed PU's or a soloist pro (seymour duncan)

[rnolan]

Well they are humbuckers then (which was my main interest, as he has noise).  Maybe you can help him sort it out next gig you do with them ?