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Condenser Mic Question

S

Spin

Jan 1, 1970
0
have a broken Marshall MXL USB mic which isn't worth getting repaired. The
mic element is 32mm in diameter. Is it feasable to remove the condenser
element & connect it directly into the mic input of my computer sound card?
 
P

Phil Allison

Jan 1, 1970
0
"Spin"
have a broken Marshall MXL USB mic which isn't worth getting repaired. The
mic element is 32mm in diameter. Is it feasable to remove the condenser
element & connect it directly into the mic input of my computer sound
card?


** Told you before - no.

A condenser mic capsule is nothing more than a 20 to 100pF capacitor with
one fixed and one flexible side.

It needs DC polarising with 30 to 100 volts and a sensitive pre-amp with
around a 1Gohm input impedance.



....... Phil
 
G

GregS

Jan 1, 1970
0
"Spin"



** Told you before - no.

A condenser mic capsule is nothing more than a 20 to 100pF capacitor with
one fixed and one flexible side.

It needs DC polarising with 30 to 100 volts and a sensitive pre-amp with
around a 1Gohm input impedance.



....... Phil

And in this case uses a fet near the element to get some juice
going. I was starting to write capsule, and this certainly isn't a capsule.
All the stuff should be allready be there minus the USB.

greg
 
E

Eeyore

Jan 1, 1970
0
GregS said:
And in this case uses a fet near the element to get some juice
going.

The fet has NOTHING to so with 'getting the juice going'. It's simply a very high input impedance
buffer stage.

I was starting to write capsule, and this certainly isn't a capsule.

Yes it is. A capsule is the precisely the correct name for it.

The electret type you may be confusing it with is strictly speaking NOT a capsule becasue it also
contains some electronics (like the aforementioned fet).

Graham
 
P

Phil Allison

Jan 1, 1970
0
"GregS"
"Phil Allison"
"Spin"


And in this case uses a fet near the element to get some juice
going.


** The FET is no use without the polarising voltage or a DC supply.

I was starting to write capsule, and this certainly isn't a capsule.


** The term " capsule" is commonly used for such things.

Just distinguishes the transducer of a mic from the case / handle, matching
transformer and/or internal pre-amp circuitry.

All the stuff should be allready be there minus the USB.


** Shame how power from the USB is used to operate the mic.



........ Phil
 
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