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Neutrix locking Jack, grounds thru case

post #1 of 10
1/15/10 at 8:21am
Thread Starter 
Anyone else notice that the neutrix locking jack everyone uses grounds the signal ground thru the case? Makes it tough to star ground.
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post #2 of 10
1/15/10 at 8:52am
I haven't handled one, but from the Neutrik site:

Quote:
Closable grounding options: standard isolated, to get a sleeve/panel connection red isolator on lateral screw must be removed
so it seems like it is supposed to be isolated.
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post #3 of 10
1/15/10 at 3:07pm
Correct. I have one right in front of me. The screw that ties in to the ground lug has a red isolating washer on it. With the washer on, which is how it came stock, there's no electrical connection to the metal housing. Just verified it with my meter.

se
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post #4 of 10
1/15/10 at 3:55pm
Quote:
Originally Posted by regal View Post
Anyone else notice that the neutrix locking jack everyone uses grounds the signal ground thru the case? Makes it tough to star ground.
A balanced amplifier has no signal ground. Putting two single ended amps back to back makes a bridged amplifier, not necessarilly a balanced one. Now, balanced amps need a signal reference, and many people use "ground" for this, but this reference should not be shared between components through your connector -- defeats the whole point of balancing. Pin 1 on an XLR is earth/chassis ground.



Some Neutriks have pin 1 connected to the case, others don't -- check the datasheets.
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post #5 of 10
1/15/10 at 4:02pm
Quote:
Originally Posted by dsavitsk View Post
A balanced amplifier has no signal ground. Putting two single ended amps back to back makes a bridged amplifier, not necessarilly a balanced one. Now, balanced amps need a signal reference, and many people use "ground" for this, but this reference should not be shared between components through your connector -- defeats the whole point of balancing. Pin 1 on an XLR is earth/chassis ground.
Hey Doug!

I believe he was referring to Neutrik's locking TRS jack, not XLR.



se
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post #6 of 10
1/15/10 at 4:08pm
Ah, well, those you shouldn't use because they're ugly ...
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post #7 of 10
1/15/10 at 4:32pm
Quote:
Originally Posted by dsavitsk View Post
Ah, well, those you shouldn't use because they're ugly ...


se
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post #8 of 10
1/16/10 at 6:16am
Thread Starter 
Ah, my red washer was warped and the screw was contacting the body.


Thanks.
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post #9 of 10
1/16/10 at 12:59pm
Quote:
Originally Posted by dsavitsk View Post
Ah, well, those you shouldn't use because they're ugly ...
I happen to like the unique ugliness of them.
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post #10 of 10
1/16/10 at 1:36pm
Quote:
Originally Posted by dsavitsk View Post
Ah, well, those you shouldn't use because they're ugly ...
x2. if you need a locking jack this one looks much better: Switchcraft
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