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really? .89c ground lifters?

if i understand correctly (and I'm guessing that I don't), only one component in a given system should be grounded.

so does that mean that all you guys with your GNP-level systems, plumbed with bazillion dollar power cords, are using a bucketful of home depot-style ground lifters? I'm having a hard time wrapping my head around that. Is there some source for solid-gold cryo'd ground lifters I have not found?

How is this problem addressed? My searching skills are failing this morning...there was a lot of chilean and argentinean wine involved last night. thanks.
soundgasm
atmasphere's avatar
atmasphere
11,834 posts
 
Yes, it does not matter tube or transistor. The real issue would be if somehow there is leakage from a power transformer.
jea48
4,446 posts
 
04-23-10: Atmasphere
Yes, it does not matter tube or transistor. The real issue would be if somehow there is leakage from a power transformer.
04-23-10: Atmasphere

Atmasphere,
Speaking of transformer leakage....
Say there is a slight leakage in the primary winding of the power transformer to ground, small, not enough current flow to cause an internal equipment fuse to blow.
Current flow to ground never the less. Could this small current flow cause a ground loop hum problem? (By leakage I mean other than capacitive leakage.)
Jim
atmasphere's avatar
atmasphere
11,834 posts
 
Jea48, I wouldn't call that a ground loop. If there was something like that, it would cause the ground to be noisy. While a ground loop is also a noisy ground, the difference is that the former is caused by a malfunction rather than a gain stage later in the signal chain.
jea48
4,446 posts
 

I wouldn't call that a ground loop. If there was something like that, it would cause the ground to be noisy.
04-23-10: Atmasphere
Could it cause a ground loop hum?

Why would it be any different than ground current flow from a CATV system? In both cases current is flowing through the equipment ground. We know current will take any provided path back to the source. If the ground current flow is present what would prevent it also from flowing through the ics signal ground to other three wire cord and plug safety grounded equipment to get back to the source?
auxetophone
114 posts
 
"The only way to get a shock from the B+ is to actually put yourself in series between the B+ and B- ..... Lifting the safety ground would not change the likelihood one way or the other....."

Actually, if something goes wrong with the equipment - like a B+ wire touching the chassis - you're better off sending that to ground and blowing a fuse, than letting it sit out there to electrocute your kids.
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