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[gtoledo3]

It is also worth noting the continuity of production. Everything with that run had continuity with the original U67 production line, it was literally a continuation. The more recent U67 is from a newly created production line, different machinery, different location of manufacture, etc.

[klaus]

Maybe I misunderstood your term "continuity"?

Most vital parts of the 1992 series were new at that time, and not left-overs from the 1960s/early 1970s: transformer, head assembly, tube socket, wiring, circuit boards, all passive components, capsule generation, etc.

[gtoledo3]

Maybe I misunderstood your term "continuity"?

Most vital parts of the 1992 series were new at that time, and not left-overs from the 1960s/early 1970s: transformer, head assembly, tube socket, wiring, circuit boards, all passive components, capsule generation, etc.

At the time of the SLO, one of the Neumann representatives on their forum made this statement. That any future U67 would really be a new product because a new production line would likely have to be setup.

The SLO parts were new production, but Neumann was claiming that they were done via the original production line and methodology.

[klaus]

Thanks for clarifying the term.

[Derek Samuel Reese]

Klaus may I ask a question about the wiring of the u67 female connector please.
I see 7 wires in your photo plus a copper wire.
I want to switch out my binder connector to an original Neumann connector in my swivel mount.
May I ask which two wires are grounded to the cable housing ?
Also do I not connect wire number 6 ?
I’ve offered to pay three different people to do this for me with no luck so I am going to do it myself.
I’ve been brave enough to switch out a u67 capsule which I think is much scarier to a novice like myself. Thank you Klaus.

[klaus]

Derek,
The pins one the Tuchel connector will be wired the same way as on the Binder connector:
#1 = Audio (+)
#2 = Audio (-)
#3 and #7 = ground and shield*
#4  = tube heater (6.3VDC max)
#5 = B+ (210VDC)
#6 = open

Don't rely on colors of the wire jackets for your pin assignment, as they are freely and inconsistently chosen, often without any adherence to a pattern you can trust

* there are several ways to connect ground and shield to these two pins: you can use #3 for the ground wire and #7 for the shield, or vice versa, or you can solder both ground and shield to the same pin (#3 or #7) but you MUST make sure that #3 and #7 are at the same potential, either by using a bridging wire between the two pins or by splitting the shield in half, connecting each half to #3 and #7 respectively.

[Derek Samuel Reese]

Thank you for this Klaus :-)
Would you happen to have a diagram of this for me to see ?
I understand what you have written but it’ would be great to see this in picture form.
You didn’t mention which wire or wires connect to the housing of the cable ?
Unless I’m reading this all wrong.

[klaus]

Would you happen to have a diagram of this for me to see?

Derek,
wiring diagrams for the U67 can be readily googled. Attached is one of them.

You didn’t mention which wire or wires connect to the housing of the cable?

You make a wire connection between ground/shield terminals and the strain relief clamp which then grounds the housing of the connectors. You can do that by either splitting half of the strands of the bare shield wires and clamping them to the strain relief, or you can solder a separate wire between pin #3 or #7 and the strain relief clamp.

[Derek Samuel Reese]

I meant a diagram for a lay person, here is my crude drawing Klaus, am I on the right track ?
If not maybe someone can kindly correct my drawing, add to it and make your own ;-)
I am adding another drawing with the shield also going to the strain relief.
If I am still wrong then I'm just not getting it and I won't take up anymore forum time.

[klaus]

That looks about right.

[Derek Samuel Reese]

Thank you Klaus.
In your u67 complete tear down article you have a picture of the inside of the cable we are discussing.
I’m seeing a copper wire, is that the ground wire or the shield wire ?
Lastly it looks like the copper wire is soldered to the cable housing along with a black wire ? Which number is the black wire ?
In my drawing I only have one wire soldered to the cable housing.
Also I would like to thank you for your patience with me Klaus, I’m sorry it took me so long to understand.
I bet everyone on this forum would pay good money if you ever decided to write a book on all of this.

[klaus]

In the case of that particular Neumann cable you mention, the black wire is the ground wire (goes to #3 or #7 or to both, as in the end #3 and #7must be at ground potential, together with the shield). The shield is the bare copper wire in the picture.

As I wrote: I advise not to go by cable colors, because mic manufacturers do not always stick with the same color scheme when they terminate conductors: Neumann, for example, changed colors frequently on the broadcast-type cable they used throughout the 1970s.

So it is alway better to look at the schematic for proper terminations, and, if that is too much for the novice, to at least make sure that the same conductor color goes to the same pin on both cable ends.

[Derek Samuel Reese]

Thank you for this Klaus, I will try to do the cable myself.
Thank you for all of your information and time.