G
Guest
Guest
Hi All,
I had interesting project for christmas time: to DIY Schoeps
type omnidirectional high-frequency mic. (working at some 8MHz)
I decided to Schoeps topology (two resosnant circuits in
one oscillator, where one is tuned by capsule and one by capacitor
trimmer) because of simplicity and minimum components.
Firstly I set up capsule, original capsule was Mylar, cardioid,
I modified to Al diaphragm ( motion controlled by backplate structure/air compliancy) omni.
Capsule porn:
http://www.rudolfinea.cz/capsorig.jpg
Epoxy filling:
http://www.rudolfinea.cz/epoxy.jpg
Al diaphragm pretension (micron thick, pure Al, I use it for ribbons )) )
http://www.rudolfinea.cz/aldiaph.jpg
After I mod capsule, I mod the mic:
http://www.rudolfinea.cz/vfmictop.jpg
http://www.rudolfinea.cz/vfmicbot.jpg
And it is result :-((((((.....((((
40 dB dynamic range. BAAAAAD.
http://www.rudolfinea.cz/mic1.wav
Can someone help me???, PLEASE...
xvlk
I had interesting project for christmas time: to DIY Schoeps
type omnidirectional high-frequency mic. (working at some 8MHz)
I decided to Schoeps topology (two resosnant circuits in
one oscillator, where one is tuned by capsule and one by capacitor
trimmer) because of simplicity and minimum components.
Firstly I set up capsule, original capsule was Mylar, cardioid,
I modified to Al diaphragm ( motion controlled by backplate structure/air compliancy) omni.
Capsule porn:
http://www.rudolfinea.cz/capsorig.jpg
Epoxy filling:
http://www.rudolfinea.cz/epoxy.jpg
Al diaphragm pretension (micron thick, pure Al, I use it for ribbons )) )
http://www.rudolfinea.cz/aldiaph.jpg
After I mod capsule, I mod the mic:
http://www.rudolfinea.cz/vfmictop.jpg
http://www.rudolfinea.cz/vfmicbot.jpg
And it is result :-((((((.....((((
40 dB dynamic range. BAAAAAD.
http://www.rudolfinea.cz/mic1.wav
Can someone help me???, PLEASE...
xvlk