Balanced to Unbalanced

[Lambda]

It would be most helpful to our viewers at home if you indicated the source of those images in the linked post.

i made them

 

[babadono]

https://www.audiosciencereview.com/...anced-to-unbalanced.60943/page-2#post-2238167 has most output topologies.
What output topology are you missing? And with what output topology would a ~600Ω resistance from pin 1 to 3 cause problems?
As shown in #24, this would work with all outputs I can think of, with the exception of an impedance-balanced signal where only the negative line is driven.

You are not missing anything. I am just saying that diagrams like yours are overly simplified and do not allow a clear understanding for those unfamiliar or new to interfacing balanced and unbalanced equipment of how inter chassis ground currents and signal ground currents will or do flow between balanced and unbalanced equipment. "You must always consider where the current will flow"--Bill Whitlock

 

[Lambda]

of how inter chassis ground currents and signal ground currents will or do flow between balanced and unbalanced equipment. "You must always consider where the current will flow"--Bill Whitlock

As i understand you and maybe that's wrong your saying in post #38
"a 600Ohm connection between signal and chassis ground dependent on output topology cause problems"

My question is
With what topology dose it cause what problems?

To Rephrase you:

your diagrams are overly simplified and do not allow a understanding ...of how inter chassis ground currents and signal ground currents will flow between balanced and unbalanced equipment.

If i’m getting you right?
what are you missing to get a clear understanding of how inter chassis ground currents and signal ground currents will flow?

 

[rdenney]

I didn't read every word in every post, but I did scan them.

As I read in the early posts in this thread, this is for road equipment, where the OP can't predict until arrival whether the thing the equipment will plug into has a balanced input or a single-ended input. The OP doesn't know how the equipment is wired beforehand.

So, don't do this with cables. That has been written already.

One of the most respected devices for this purpose, which is well known in pro audio for this exact use case, is the Henry Engineering Matchbox HD.

MATCHBOX HD » Henry Engineering

HENRY ENGINEERING, P.O. BOX 3796 Seal Beach, CA. 90740 Phone:(562) 493-3589 Contact Us Facebook Twitter © Copyright 1996-2018, Henry Engineering

henryeng.com

This active device will amplify the negative side and provide a 6-dB gain going from unbalanced to balanced, and will address the standard noise issues going from balanced outputs to an unbalanced input. It does not use transformers, but rather an arrangement of op-amps, and thus it introduces negligible noise, particularly in a live-sound environment.

Rick "has a couple of these, plus a home-built device that uses similar THAT specialty op-amps for making this conversion" Denney

 

[babadono]

As i understand you and maybe that's wrong your saying in post #38
"a 600Ohm connection between signal and chassis ground dependent on output topology cause problems"

My question is
With what topology dose it cause what problems?

To Rephrase you:

If i’m getting you right?
what are you missing to get a clear understanding of how inter chassis ground currents and signal ground currents will flow?

I am not missing anything.

 

[babadono]

I should just let sleeping dogs lie. Let people go on making the same interfacing mistakes and scratching their heads when they get hum and buzz. Sorry I butted in...Carry on.