#1
What exactly does the grounding switch on the back of my amp do? I honestly have no idea
#2
Assuming you've got an old Fender amp, it changes the polarity of the plug. One way will result in a safely operating amp with less buzz; the other way may have more hum but more importantly also put 120V on the chassis. This is what we call a "bad thing." It needs to be taken to a tech and given a proper 3-prong cord (have the death cap removed while it's there). If it has one already or it's a newer reissue amp, the ground switch has been disconnected and doesn't do anything.
#4
Maybe a ground lift to prevent ground loops?
Gear:
- Bugera 333
- VJ & VJ cab
- Jackson JS30
- TS9

Bugera Users Militia. We are horrible people. With a sprinkler fetish.
~ BUM: For all things extinguishing

Rackmount Tube Amp Project <<< Updates!
#5
it breaks any ground loop in your signal chain it`s normally labelled "ground lift", the other option would be to use a external ground lift or a power conditioner.
#6
Out of curiosity, in what application would one not use it? Why not use it all the time?
Guitars:
Ibanez JS1200
PRS SE EG S/S/H
Effects:
Dunlop Crybaby 535q
TC Electronic Corona Chorus
Morley Little Alligator
Boss DD-6
Amp:
Carvin V3m
Carvin 212 cab
#7
you would use it when you are getting lots of hum from the amp fom things like pc`s, flourescent tubes, old building wiring etc, really comes into it`s own if you are playing in churches that have been converted into live music venues,
Last edited by ibanezgod1973 at Jul 28, 2010,
#8
Quote by Saminator
Out of curiosity, in what application would one not use it? Why not use it all the time?
When your amp isn't grounded through other means?
Gear:
- Bugera 333
- VJ & VJ cab
- Jackson JS30
- TS9

Bugera Users Militia. We are horrible people. With a sprinkler fetish.
~ BUM: For all things extinguishing

Rackmount Tube Amp Project <<< Updates!
#9
Removing the chassis ground may remove some hum but in doing so it also removes the ground protection, if the chassis goes live it stays live. It reduces safety, that's why it isn't permanent. If you don't need the ground lifted then don't do it.
Gilchrist custom
Yamaha SBG500
Telecasters
Randall RM100 & RM20
Marshall JTM45 clone
Marshall JCM900 4102 (modded)
Marshall 18W clone
Fender 5F1 Champ clone
Atomic Amplifire
Marshall 1960A
Boss GT-100


Cathbard Amplification
My band
Last edited by Cathbard at Jul 28, 2010,