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Author Topic: Neumann U67 Reissue: Complete Tear Down and Analysis  (Read 67027 times)

Mannix

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Re: Neumann U67 Reissue: Complete Tear Down and Analysis
« Reply #60 on: April 21, 2020, 10:33:55 PM »

Are either of these correct?
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Mannix

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Re: Neumann U67 Reissue: Complete Tear Down and Analysis
« Reply #61 on: April 21, 2020, 11:18:01 PM »

I also saw that  Sommercable Octave Tube makes a cable with connectors for the 67.  Telefunken USA uses this for their 'Diamond' series.
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klaus

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Re: Neumann U67 Reissue: Complete Tear Down and Analysis
« Reply #62 on: April 22, 2020, 03:52:35 AM »

Are either of these correct?

If by 'correct' you mean like the Belden I mentioned in my review? No. as I wrote: the Belden you can see the cork-screw layer of teh shield through the jacket. I guess, I have to take a picture and post it.

The cable material you show still might be good, though. Listen and compare...
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Klaus Heyne
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Derek Samuel Reese

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Re: Neumann U67 Reissue: Complete Tear Down and Analysis
« Reply #63 on: April 22, 2020, 10:48:24 AM »

You are welcome. But please please read this forum's ground rules again:

 (" Cross posts. The 'buckshot' approach to placing identical or similar posts of inquiry on several forums is discouraged. Professionals who take time and make efforts answering inquiries placed on my forum deserve the courtesy of undivided attention. With few exceptions (stolen mic alerts) cross posts will be deleted.

My apologies Klaus, I didn’t realize I couldn’t post elsewhere, won’t happen again.
I think I have finally found the Belden cable :-)
Please tell me this is it ?
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Derek Samuel Reese

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Re: Neumann U67 Reissue: Complete Tear Down and Analysis
« Reply #64 on: April 22, 2020, 11:42:21 AM »

I have deleted the post in question,
I can see this cable has the outline of the shield pattern poking through the jacket.
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klaus

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Re: Neumann U67 Reissue: Complete Tear Down and Analysis
« Reply #65 on: April 22, 2020, 02:54:22 PM »

I think I have finally found the Belden cable :-)
Please tell me this is it ?

Yes, it's the one connected to the swivel mount.
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Klaus Heyne
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Derek Samuel Reese

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Re: Neumann U67 Reissue: Complete Tear Down and Analysis
« Reply #66 on: April 22, 2020, 02:59:21 PM »

Yes, it's the one connected to the swivel mount.
Awesome
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klaus

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Re: Neumann U67 Reissue: Complete Tear Down and Analysis
« Reply #67 on: April 22, 2020, 03:05:15 PM »

Klaus the cable you are calling Belden (corkscrew pattern under the wire)
(...) this is what someone told me after speaking to a a person at Neumann Berlin.

Please cite the source for your information. "Someone... speaking to a person" is not good enough. It's hearsay (another no-no in the ground rules), unless it can be traced back to a real person and the source can be confirmed.

FYI: I have here a similar, "Belden"-labeled and numbered cable whose build features are identical to the cable that was used with U67 in the 1960s. The "EMT" cable your source refers to is the famous double Reussen layer shield version, used initially by the German Broadcast Service, its jacket is smooth, and extremely flexible, without any visible print through of the shield layer. Its construction is completely different from Belden's and is easily recognized without opening it up.
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Klaus Heyne
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Derek Samuel Reese

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Re: Neumann U67 Reissue: Complete Tear Down and Analysis
« Reply #68 on: April 22, 2020, 03:21:12 PM »

I broke the rules again ? i didn't realize that conversations on a forum would be so strict ? I'm not trying to be difficult i am just trying to understand the famous Belden cable.
So i am now wondering if the last picture i posted is a Belden or double Reussen layer shield version ?
The corkscrew print is visible through the cable.
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klaus

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Re: Neumann U67 Reissue: Complete Tear Down and Analysis
« Reply #69 on: April 22, 2020, 04:06:05 PM »

It looked like the Belden cable to me. The silvery color of the jacket is a hint, too. Please read my response again: ONLY (added here, for clarification) the Belden has the outline of the shield pattern poking through the jacket.

As to hearsay: this forum is quite different in trying to maintain a high s/n ratio. Its rules have been copied far and wide on other forums. One way to stay authoritative and trustworthy with information is to read and comply with the ground rules on hearsay:

"...* Posts containing quotes without attribution or original source. These are just hear-say and not good enough for this forum. ("...a trusted engineer-friend thought mic x rocks...") If the engineer thinks it rocks, then ask him to step up and share with us what he knows."...

So, please, back up what you 'heard' with a verifiable source, or delete those statements.

Thanks,
KH
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Klaus Heyne
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Derek Samuel Reese

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Re: Neumann U67 Reissue: Complete Tear Down and Analysis
« Reply #70 on: April 22, 2020, 04:22:10 PM »

I deleted my statements Klaus.
I can see the outline of the shield pattern poking through the jacket so i guess this is a Belden :-)
I found a gentleman who is kindly attaching a swivel mount and male connector with this cable.
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klaus

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Re: Neumann U67 Reissue: Complete Tear Down and Analysis
« Reply #71 on: April 22, 2020, 05:06:37 PM »

Great. Make sure that the person who wires up the cable with the connectors follows Neumann's ground/shield scheme, for maximum suppression of noise and RF: cable ground and shield must be connected together and terminated at pins 3 and 7 AND the connector housings.

That scheme has to be executed exactly the same way on both connectors.

And, please report back on how you like the sound of that cable!
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Klaus Heyne
German Masterworks®
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Derek Samuel Reese

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Re: Neumann U67 Reissue: Complete Tear Down and Analysis
« Reply #72 on: April 22, 2020, 05:24:42 PM »

Great. Make sure that the person who wires up the cable with the connectors follows Neumann's ground/shield scheme, for maximum suppression of noise and RF: cable ground and shield must be connected together and terminated at pins 3 and 7 AND the connector housings.

That scheme has to be executed exactly the same way on both connectors.

And, please report back on how you like the sound of that cable!

I am passing along your suggestion and will keep you posted on how it sounds,
And a big thank you again Klaus :-))))
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Mannix

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Re: Neumann U67 Reissue: Complete Tear Down and Analysis
« Reply #73 on: April 22, 2020, 06:34:51 PM »

Just a note of caution: Older Belden 8404 cable looks the same as the Belden 3344.  (Gray Exterior with corkscrew outer appearance.) That being said, I don't know if it is similar or not.
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Derek Samuel Reese

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Re: Neumann U67 Reissue: Complete Tear Down and Analysis
« Reply #74 on: April 22, 2020, 07:05:48 PM »

Just a note of caution: Older Belden 8404 cable looks the same as the Belden 3344.  (Gray Exterior with corkscrew outer appearance.) That being said, I don't know if it is similar or not.

Interesting, if it’s the 8404 or the 3344 I’m sure it will be great 👍🏼
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