"Scott Dorsey" wrote in message
...
Jean Marie MATHIEU wrote:
This is very interesting

http://www.gefell-mics.com/capsules.htm

Who, except Gefell, make non mylar gold sputtering capsules ?

Nobody else. PVC has poor long-term stability, which is why Neumann gave
up on it years ago. But, there are folks who still like the sound and can
live with the inconsistency and maintenance headaches.

Most U47s today have been reskinned with mylar, because the original PVC
failed. This changes the sound (and many folks love the sound of the
U47 with the brittle PVC diaphragm that is about to fail, too).

What is the technologie of the Schoeps, Neumann, Josephson etc. and why ?

Almost everyone today is using mylar diaphragms with some sort of metal
sputtering. Mylar is light, consistent, and stable.

Gefell, and some of the measurement microphone people, make a few capsules
using very thin nickel foils, with no plastic backing.

Ty was telling me, when we had a nice chat on the phone awhile back, about a
Gefell omni mic that had a nickel diaphragm... can't remember the model, but
I remember him being quite impressed with it. I don't believe I've
personally ever heard any mics with nickel capsules - anyone have any
opinions on what type of colorations one can expect from nickel? Or is it
more dependant on the nickel, plus the electronics/overall design of the
mic?

Neil Henderson