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Phil Allison[_4_] Phil Allison[_4_] is offline
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Default Schoeps Blue Dot Sensitivity CMC5

Scott Dorsey wrote:


Sean B

How is the +5dB gain increase produced inside the Schoeps CMC5 body?


With transistors.

Literally, there is a small amount of voltage gain and a massive amount
of current gain from the front end FET.

The output stage is just dual cathode followers, producing only current
gain with no voltage gain.


** This U-Tube shows how the adjustment can be done:

https://www.youtube.com/watch?v=xtcnoC620Fc


( Scott mean to say " emitter followers", not cathode )


The current gain is enormous throughout the thing... input Z is several
megohms and output Z is tens of ohms. The voltage gain is minimal.



** The front end FET stage would have an input resistance about 1 Gigaohm - hence the warnings about handling that area.



..... Phil