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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
jea48
2,944 posts
 
It's probably worth pointing out that the danger from lifting grounds is much higher with tube components. These typically have 300+ VDC - very deadly.
04-22-10: Auxetophone
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.....
atmasphere's avatar
atmasphere
7,068 posts
 
Yes, it does not matter tube or transistor. The real issue would be if somehow there is leakage from a power transformer.
jea48
2,944 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
7,068 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
2,944 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?
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