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 on: March 10, 2019, 02:44:53 pm 
Started by Tim Campbell - Last post by klaus
Proof will be in the pudding.
One comment:
made it (CK12 capsule) ready for the 21s century

What does that mean, factually and technically? You start messing with something ingeniously good, you can slide off the hill really fast.
Other capsule manufacturers' approach to reinventing legacy capsules should be a warning in this regard.

 on: March 10, 2019, 05:25:33 am 
Started by Tim Campbell - Last post by Frankenheimer
after several years of abstinence and hard working, my addon.

Austrian audio showed their new microphones at the NAMM etc.
(...)  removed. Too much straight advertising. K.H.
And they "reinvented" the original CK12 and made it ready for the 21s century.
There will be an updated website with listed worldwide distributors.

IMHO they are not hedge funded and the concentraded knowgledge has been presevered.
Also the woman who handcrafted the original CK12 capusle is on board.
There are plenty of pics on their facebook site !

Also there will be new headphones out really soon.

Even in the digital era, good mics are essential to every production !


The old AKG service team is also around repairing the vintage microhones. Had all my 414 etc. repaired and they do it very well.

Hope, that will clear things up.

Best regards

 on: March 09, 2019, 03:21:55 am 
Started by Nob Turner - Last post by klaus
I had stated that the capsule is original Neumann, bu this would be the first time I've seen a lead out wire much smaller in diameter than the eyelet's cup, and of a different color customary for Neumann (which so far has either been yellow or red).

 on: March 08, 2019, 11:02:08 pm 
Started by Nob Turner - Last post by uwe ret
Klaus, I hate to contradict in this case, but other than the terminal lug being bent just below the crimp, this looks very much like an original Neumann capsule. Also, as you know very well, only highly expert attempts at tampering with the center terminal will NOT leave wrinkles in the diaphragm. Also, the screw head looks pristine.

 on: March 07, 2019, 12:30:33 pm 
Started by Nob Turner - Last post by klaus
Would that imply, to you, a re-diaphragmed capsule? Or would someone have a reason to change only the lead-out wire?

No, it does not imply a rediaphragming took place, and on this specific example, it does not look like anything else but changing out the lead out wire was done.

 on: March 07, 2019, 11:32:44 am 
Started by Nob Turner - Last post by David Satz
I just wanted to point out that the TLM 49 is a single-pattern cardioid microphone, like the M 147 Tube and the U 47 fet. In those models the back half of the capsule has a purely acoustical function, and no electrical connection is required.

From a practical perspective, a dual-diaphragm capsule for a single-pattern cardioid microphone doesn't need to meet any very high standard for front/back response symmetry. It's mainly in the figure-8 setting that this matters (since any difference in front/back sensitivity causes the null to deviate from 90 degrees, thus making the microphone unsuitable for M/S or Blumlein stereo recording).

I don't know Neumann's current practices--they've gone through several twists and turns--but for some years at least, K 47/49-type capsules for single-pattern microphones were finished, QC'ed and stocked separately from the capsules for their switchable-pattern models. Unfortunately, the naming conventions have also varied over the years. As a result, the name printed on the box doesn't necessarily tell you everything that you need to know. It could take some extra effort to find out for certain what a given capsule actually is.

--best regards

 on: March 07, 2019, 08:24:34 am 
Started by Nob Turner - Last post by soapfoot
Looks genuine, but the lead-out is not.

Would that imply, to you, a re-diaphragmed capsule? Or would someone have a reason to change only the lead-out wire?

 on: March 06, 2019, 12:36:37 pm 
Started by Nob Turner - Last post by klaus
Looks genuine, but the lead-out is not.

 on: March 05, 2019, 10:11:06 pm 
Started by Nob Turner - Last post by Nob Turner
There's a seller on eBay selling what they say are Neumann capsules. Is this a genuine Neumann K47 (they say it comes from a TLM49).


 on: February 23, 2019, 03:43:17 pm 
Started by karlengel - Last post by uwe ret
The major advantage of the RF-principle is the low impedance of the capsule. For example, a typical condenser microphone capsule with a capacitance of 50 pF has an impedance varying between 160 MΩ at 20 Hz and 160 kΩ at 20 kHz. The same capsule in a 8 MHz RF-bias environment has an impedance of less than 400 Ω!
This makes the transducer far less sensitive to interference, moisture and other contamination, and easier to interface with solid state circuit topologies. Since the frequency deviations caused by the sound induced capacitance changes are relatively small, any potential artifacts are negligible and far lower than possible with conventionally DC-biased alternatives. Even without exotic design the self noise of RF-biased microphones is less than what can be achieved with equivalent traditional DC-biased circuits.
Furthermore, RF-bias enables push-pull microphone designs, completely symmetrical and balanced from capsule to output, which nicely does cancel all nonlinear capsule distortions. 
A Sennheiser white paper written by their lead professional microphones development engineer and researcher Manfred Hibbing on the subject of RF-condenser microphones is available in PDF-format, but restrictions on this forum do not allow attachments in that format. Contact me for a copy at uwe5758@att.net

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