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Author Topic: Neumann U67- capsule original or not?  (Read 10384 times)

SDVIG

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Neumann U67- capsule original or not?
« on: February 24, 2015, 04:51:59 pm »

Hi, this is my first post.
Here below are some pictures of the capsule.
I think it's not the original capsule.
(It looks very good and does not have numeric marks.)
And the wiring is not like the Neumann.
In mode 8, this does not work.)
Since I do not have a second U 67, I cannot evaluate it sounds good or bad.
Here, with 37 seconds sounds the microphone.
http://www.youtube.com/watch?v=xdaCbw16EgE
Vocal chain: Neve 1073LB-LA2A-Avid HD I/O.
Thanks for the answers.

Excuse Me.
I have to learn English.
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klaus

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Re: Neumann U67- capsule original or not?
« Reply #1 on: February 24, 2015, 06:57:56 pm »

Hello Sergei,
It's not a Neumann capsule, and, if past experience with copy capsules serves me well, this capsule will not sound anything like a Neumann K67.

Considering that you have a very early U67, judging from the head assembly, I would recommend to buy an original Neumann capsule for this mic- either used or new, to restore its sound to its original glory.

Best of luck,
KH
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Klaus Heyne
German Masterworks®
www.GermanMasterworks.com

SDVIG

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Re: Neumann U67- capsule original or not?
« Reply #2 on: February 25, 2015, 04:17:50 pm »

Thank you Klaus.

Considering that you have a very early U67, judging from the head assembly......

Is that good or bad?
I called  to Sennheiser today.
In the near future they will inform me the price of the capsule.
Maybe I'll look it at eBay.
I think I can replace the capsule myself,
because I cannot find a specialist in Moscow.
I will solder two wires as far as possible from the capsule.
Or there are any subtleties?
Сan it be installed on either side?
Thanks again.
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klaus

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Re: Neumann U67- capsule original or not?
« Reply #3 on: February 25, 2015, 07:19:20 pm »

Thank you Klaus.
Is that good or bad?
It's always good to have one of the few rather than one of the many, all else being equal.

Quote
Maybe I'll look it at eBay.
Just make sure that it is a genuine Neumann product you are buying, and not one with aftermarket diaphragms ("reskinned" = no no!) otherwise you end up where you already are.

Quote
I think I can replace the capsule myself,
because I cannot find a specialist in Moscow.
I will solder two wires as far as possible from the capsule.
Or there are any subtleties?
If you are skilled and comfortable repairing small items, and have a calm hand, and a calm mind, I see no problems. The capsule comes with the diaphragm wires already attached. But keep the solder iron's heat away from the diaphragms, and avoid splashing solder flux onto the skins!


Quote
Сan it be installed on either side?
Yes, it can. Use the side on the front that sounds better to your ears.

Good luck!
KH
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Klaus Heyne
German Masterworks®
www.GermanMasterworks.com

SDVIG

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Re: Neumann U67- capsule original or not?
« Reply #4 on: February 26, 2015, 01:41:33 am »

klaus
Thank you so much for your help.
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soapfoot

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Re: Neumann U67- capsule original or not?
« Reply #5 on: February 26, 2015, 09:23:04 am »

I've replaced/installed a few capsules, and one thing I've done for extra insurance is to place a very small plastic bag over the capsule itself when soldering the leads. This is just extra insurance against any errant solder flux splash (though I've never had that problem, it never hurts to err on the side of caution).
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SDVIG

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Re: Neumann U67- capsule original or not?
« Reply #6 on: February 26, 2015, 04:25:42 pm »

soapfoot
Thank you.
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Uwe

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Re: Neumann U67- capsule original or not?
« Reply #7 on: February 26, 2015, 05:07:46 pm »

Sergey, for servicing your Neumann microphone or obtain parts in Russia please contact:

Sennheiser Audio Ltd.
Semenovskaya 1A, 30th Floor
107023 Moscow
Russia
Tel.: +7 (495) 620 49 63
Fax.: +7 (495) 620 49 64
E-mail: info@sennheiseraudio.com
www.sennheiser.ru
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SDVIG

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Re: Neumann U67- capsule original or not?
« Reply #8 on: December 25, 2015, 05:17:51 pm »

Hello.
I replaced the microphone capsule.
I took a capsule of the new working U87AI.
In U87AI capsule works just fine.
But U67 has a low level with a new capsule.
I checked both sides of the capsule.
What is the problem?
The microphone has a 200 ohms.
The power supply NU67 does not have a PAD.
I have done everything that is written here:
http://www.neumann.com/forums/view.php?bn=neumann_archive&key=979411126&v=f

Thanks for the answers.
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klaus

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Re: Neumann U67- capsule original or not?
« Reply #9 on: December 25, 2015, 05:36:48 pm »

You will need to start checking some basics:

1. Is the mic an all-original U67, or, suspecting from did someone do monkey business in the mic amp as was done to the capsule? (please post front and rear views of the mic amp, and please use a decent camera or close-up format when doing so the latest pix are blurry).

2. Assuming the mic is all-original, you need to make some voltage measurements inside the mic: B+ = 210VDC, Heater = 6.3 VDC. If you do not know how to measure, please let someone with high-voltage condenser microphone experience do it for you.

Once you have transmitted the answers to the two points above, maybe we can get a clue.

Best of luck, and Merry Christmas!
KH
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Klaus Heyne
German Masterworks®
www.GermanMasterworks.com

SDVIG

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Re: Neumann U67- capsule original or not?
« Reply #10 on: December 25, 2015, 06:17:24 pm »

klaus
Thank you so much and Merry Christmas!
More photos:
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SDVIG

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Re: Neumann U67- capsule original or not?
« Reply #11 on: December 26, 2015, 10:36:04 am »

klaus
Hello.
Thanks for the answers.
(New photos are in the previous post also.)
More photos:
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klaus

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Re: Neumann U67- capsule original or not?
« Reply #12 on: December 26, 2015, 11:41:02 pm »

Your pictures do not show anything suspicious. Everything looks clean and original, aside of a fine version of an old stock Amperex/Phillips/Mullard EF86 tube.

Next: voltage measurements!
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Klaus Heyne
German Masterworks®
www.GermanMasterworks.com

duskb

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Re: Neumann U67- capsule original or not?
« Reply #13 on: January 07, 2016, 04:26:19 pm »

Hello.
I replaced the microphone capsule.
I took a capsule of the new working U87AI.

Not to be a Monday morning quarterback but that mic will really improve if you are able to obtain a K67 capsule. I don't know if Neumann manufactures them anymore or not but worst case find a damaged original and have Theirsch reskin it. (I had Doug Walker in Canada redo one of mine and it compares very well against an unmolested original capsule).

I've never heard a K87 on a 67 but I cant imagine the mic sounds 'right' with it on.
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soapfoot

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Re: Neumann U67- capsule original or not?
« Reply #14 on: January 07, 2016, 05:23:45 pm »

Dusk,

I'm afraid I must disagree with your advice to go with a re-skinned capsule as a cost saving measure. Re-skinned Neumann capsules represent, to me, a very poor value in comparison to a good Neumann (original) capsule, even if the fully-original Neumann capsule is more expensive. I have never heard a re-skin that sounded "right" or even especially close to it, even by the "best" re-skinners.

To my knowledge (Klaus can confirm), the K870 and K67 are identical, so there's no reason to act rashly.

If it IS a true K87 we're talking about, the difference between the K870/K67 is that the backplates on the K87 are electrically insulated from one another. I'm not sure the difference that would make in a U67, but I bet Klaus knows.
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