mstrong82 wrote:
Everyone has good points
3 pad with FET sounds popular
I'm also finding out that with FET's when I go to a 9.7mm capsule there is =
room
to use an FET tthat gets me 65 insttead of tthe typical 58 from the fet tha=
t fits
6mm
Yummy.
So I'm thinkinng why not take the bigger fet and tack it onto the back of a=
6mm
instead of inside where it wont fit,
The only thing I can think of is that putting it on the back
could give less shielding but I have no idea how signifigant
that is.
or is the 3 wire linkwitz mod getting us there
anyway ???
That has no (little) effect on self noise.
What exactly is the linkwitz mod doing?
It changes the topology of the FET amplifier from common
source to source follower. This has the advantage of
putting the gate into a feedback loop which linearizes the
amplifier (lowers the high SPL distortion) and makes the
sensitivity of the mic less dependant on the
transconductance of the FET. Sensitivity in source follower
mode will be almost entirely determined by the dimensions
and spacing of the diaphragm and not sensitive to the fairly
wide transconductance spread of FETs.
Bob
--
"Things should be described as simply as possible, but no
simpler."
A. Einstein
