Brian Roth
Well-known member
Dammit all I ask is for the conversations not degenerate into snippy crap. Of course, we'll hear this nonsense....
Bri
Proper wiring to avoid ground loops
- Thread starter mrtnasty
- Start date
Help Support GroupDIY Audio Forum:
Bri
Brian Roth
Well-known member
I may have to step away from this forum if the (non Backroom) convos turn into:
"MOMMY! brother hit me!"
"MOMMY! brother hit me first"
"MOMMY! He's lying!"
I need some Rolaids..
"MOMMY! brother hit me!"
"MOMMY! brother hit me first"
"MOMMY! He's lying!"
I need some Rolaids..
At this point it's difficult to tell if someone is "having a laugh" or we are being subjected to some firm of bot AI (although in that case the "I" element isn't working well 
).
Maybe we need to request identification of images with traffic lights from a selection of images
So I crossed posts with the last couple. Now sounding more and more auto generated ?
).Maybe we need to request identification of images with traffic lights from a selection of images
So I crossed posts with the last couple. Now sounding more and more auto generated ?
Brian Roth
Well-known member
I.....AM...A....Bot! <g>
Brian Roth
Well-known member
It took awhile before the preacher didn't worry about truckers breaking into the sermon. I learned a LOT, circa 1974.
Of course you're the DOCTOR and learned that at med school.
That wasn't the issue. It was the pseudo-technical word soup you posted.
You understand that there are actual expert and professional product designers and design engineers here who have designed and implemented such solutions in both audio and other systems ?
No. Because it simply doesn't. The load doesn't change how the connection is balanced.
The connection is balanced because of the two 150r in the hot and cold legs. The 150r between cold and hot doesn't change the balance. It just drops the level.
At the cost of introducing some of its own noise, and amplifying whatever noise remains on the line. Balancing is never perfect, there is always residual noise. Ensuring that the nominal line level is high guarantees good noise performance.
Are you aware that it depends on the level that is sent to the line?
Good planning of the level diagram (are you familiar with it?) would ensure that the line level is consistent with a manageable position of the volume control.
Brian Roth
Well-known member
So, Doctor.......you say you know EVERYTHING....
How many successful desks have you designed/built? How many successful studios? How many video production rooms?
Dammit, I need to get to bed. I have REAL stuff to do later this day besides doing a Dick Measuring process.
How many successful desks have you designed/built? How many successful studios? How many video production rooms?
Dammit, I need to get to bed. I have REAL stuff to do later this day besides doing a Dick Measuring process.
This is a very old topic and calling all interface hum issues "ground loops" is inaccurate.
even the wiki definition is inaccurate
They describe an ohmic voltage drop due to ground current flows between SKUs. That is a real thing but not a ground loop. A loop implies a one turn magnetic circuit where stray magnetic fields develop a voltage across that one turn winding. I have seen this happen inside high power audio amplifiers where the significant transformer's magnetic filed could induce hum into circuit paths that inadvertently circumscribe magnetic loops.
The vast majority of interface hum problems mis-described as ground loops are actually ground reference contamination due to stray current flows improperly bonded to safety ground and not rejected by proper input signal differential treatment.
======
JR
even the wiki definition is inaccurate
wiki said:
They describe an ohmic voltage drop due to ground current flows between SKUs. That is a real thing but not a ground loop. A loop implies a one turn magnetic circuit where stray magnetic fields develop a voltage across that one turn winding. I have seen this happen inside high power audio amplifiers where the significant transformer's magnetic filed could induce hum into circuit paths that inadvertently circumscribe magnetic loops.
The vast majority of interface hum problems mis-described as ground loops are actually ground reference contamination due to stray current flows improperly bonded to safety ground and not rejected by proper input signal differential treatment.
======
Brian... being an old member does not give you license to be uncivil to drtecho he deserves the same civility we demand from him.
JR
radardoug
Well-known member
And....... Dr Techno has left the building! Or did you take him out John?
Indeed. Although the posts have been deleted ? So....
Meanwhile the 'wokerati' in me has to point out that I didn't see any identification with being male of female
? I'd guess male though tbf 
Last edited:
ruffrecords
Well-known member
I missed a few days of this thread. I see you have been Dr Techno'd. I came across him a year or so ago on GS and his grasp of reality then was tenuous at best.
Cheers
Ian
Cheers
Ian
"tenuous" is putting it mildly tbh
Brian Roth
Well-known member
I apologize for my bad rantings earlier today. Folks here know that I'm usually laidback, but some days.................
Bri
Bri
It appears that he was last active on GS back in 2018.... (time flies)
He seems very sure of himself, like more than a few people around here.
lets try to be gracious
JR
Brian Roth
Well-known member
I was curious, so I just looked at The Doctor's profile again. Now sez zero posts. Guess he deleted his comments....which will make this thread confusing for anyone reading in the future.
Again, I apologize for flying off the handle.
Bri
Again, I apologize for flying off the handle.
Bri
Well, except for the quotes that got replied to, but yeah...
Brian Roth
Well-known member
LOL....I had to go back to the beginning of this thread and remind myself what we were discussing.
Bri
Bri
