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Author Topic: New Neumann U87 Capsules: Finally A Turn-Around in Quality?  (Read 7958 times)

klaus

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Re: New Neumann U87 Capsules: Finally A Turn-Around in Quality?
« Reply #30 on: July 15, 2017, 11:18:30 am »

For the answer please read my opening post #1, and update, #23.
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Klaus Heyne
German Masterworks
www.GermanMasterworks.com

FoxFoxFox

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Re: New Neumann U87 Capsules: Finally A Turn-Around in Quality?
« Reply #31 on: July 18, 2017, 03:54:12 am »

thank you for your time! it has ∆4(14?) and 22 on the bottom left of the capsule and the 9 on the bottom right all in blue ink. on the top right it has ∆2, or 12. The Mic was Manufactured in 2012, also on the circuit board there is a small floating tray holding up an island of tiny circuits towards the top (looks really modern) is that bad?. It reads on the bottom of the circuit on top of an amp? "Circuit Board 05." Any info would be appreciated.

edit: Okay I see you do not like this circuit board  ;D the mic sounds really full. fuller than I expected on the other hand! Anyway to get rid of that daughterboard and make it as stock as the ones without the daughterboard... ?
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klaus

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Re: New Neumann U87 Capsules: Finally A Turn-Around in Quality?
« Reply #32 on: July 18, 2017, 11:27:24 am »

As I have said previously: chances are good that your mic predates the period of frequently tight low end in K870 capsules.

In circuit revision # 4 and #5, the 'daughter board' replaced the previous discrete FET circuitry on U87Ai circuits.
It can easily be removed, and a few missing passive components and a new 2N3819 FET (properly biased) installed. Once the FET is properly biased, you would be back to the simpler, better-sounding circuitries # 2 and #6.
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Klaus Heyne
German Masterworks
www.GermanMasterworks.com

FoxFoxFox

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Re: New Neumann U87 Capsules: Finally A Turn-Around in Quality?
« Reply #33 on: July 18, 2017, 11:41:17 am »

Okay which one is mine then because I thought the daughter board was the floating tray, because mine is circuit 5, and it def has that "floating tray" on top of the regular board
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klaus

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Re: New Neumann U87 Capsules: Finally A Turn-Around in Quality?
« Reply #34 on: July 18, 2017, 12:12:00 pm »

Yours has the daughter board. I forgot to include circuit #5 as the other revision that used the daughter board (previous post now corrected).
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Klaus Heyne
German Masterworks
www.GermanMasterworks.com

FoxFoxFox

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Re: New Neumann U87 Capsules: Finally A Turn-Around in Quality?
« Reply #35 on: July 18, 2017, 07:53:05 pm »

Thanks Klaus!! I want to do the mod to get it back to #2 and #6, who do you recommend in NYC? also how much do you think this job typically cost
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klaus

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Re: New Neumann U87 Capsules: Finally A Turn-Around in Quality?
« Reply #36 on: July 18, 2017, 11:53:16 pm »

You can try Tom Onofrio in Connecticut. He used to work at Neumann/Sennheiser in Old Lyme.
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Klaus Heyne
German Masterworks
www.GermanMasterworks.com

soapfoot

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Re: New Neumann U87 Capsules: Finally A Turn-Around in Quality?
« Reply #37 on: July 19, 2017, 08:47:00 am »

Second the recommendation for Tom O.
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FoxFoxFox

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Re: New Neumann U87 Capsules: Finally A Turn-Around in Quality?
« Reply #38 on: July 19, 2017, 10:43:09 pm »

i want to, but its quite expensive
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FoxFoxFox

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Re: New Neumann U87 Capsules: Finally A Turn-Around in Quality?
« Reply #39 on: Today at 09:31:23 am »

does 300-500$ sound a little high for this job?
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klaus

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Re: New Neumann U87 Capsules: Finally A Turn-Around in Quality?
« Reply #40 on: Today at 11:30:03 am »

I am questioning the wide range of the estimate. Unless there are other issues your mic has*, FET conversion should be a well defined, straight job.

*For that reason I avoid giving estimates before I see a mic. But there are rare cases, where the scope of work is clearly defined, because other problems the mic may have can be safely excluded (capsule cleaning, cable manufacturing, etc.)
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Klaus Heyne
German Masterworks
www.GermanMasterworks.com

FoxFoxFox

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Re: New Neumann U87 Capsules: Finally A Turn-Around in Quality?
« Reply #41 on: Today at 11:46:08 am »

I am questioning the wide range of the estimate. Unless there are other issues your mic has*, FET conversion should be a well defined, straight job.

*For that reason I avoid giving estimates before I see a mic. But there are rare cases, where the scope of work is clearly defined, because other problems the mic may have can be safely excluded (capsule cleaning, cable manufacturing, etc.)

Strange, respectfully this is a quote from Tom O. He also doesn't do it either but that was the range he gave me. The mic is rock solid, the signal to noise ratio sounds astonishingly good
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