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TECHNICAL INFORMATION:

Electret Capsules and Circuit schematic: I can fit most any capsule you want to any of my microphones for a nominal extra fee.

Here's a link to pick one out, cardoid patterns also available. Digi-Key Electret Capsules

I have two different styles of omnidirectional microphone capsules readily available .

 CMA-4544PF-W

WM61-A

 

 

Displayed is the schematic of the Schoeps electret transformer circuit used for the Soundcatcher.

  With matched 2N5087 transistors.

  I have also added 22pf capacitors parallel to he 100K resistors, for maximum low noise performance.

 

Condenser Microphone info

Specifications
Type Pressure gradient condenser microphone
Diaphragm 6 micron gold-sputtered
Capsule Size 0.87" (22 mm)
XLR Connector Gold Plated
Frequency Response 30Hz - 20KHz
Polar Pattern choice of Cardioid or Omnidirectional
Sensitivity 10mV/Pa
Output Impedance 200 ohms
Equivalent Noise 18 dB (A-weighted IEC 268-4)
S/N Ratio 80 dB (Ref. 1 Pa A-weighted)
Max SPL for .5% THD 134 dB
Power Requirements +48V phantom power (+/-4V)

Various Condenser Microphone Scematic variants

Passive DI Scematic

Great Article on Electret Microphone Circuits by Scott Dorsey

 

Wired Soundcatcher Scematic

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