Palomar SL41 microphone

Between the two, there is a difference of eight components (outside the element) and these can be really small.

Take the power conditioning/current limiting components out of the schematic of the SL, it looks like a band pass filter is all you have.

By the way I am wonder if that schematic you got from Eric is actually the right one, because it looks like the element is a three connection element, not a two connection element like this schematic is.

 

How big is the case, 2x2?

 

You've got a lot of room.

 

Naw, You can put a whole radio on that space.

 

Guess ill keep the sl41 i bought a cpl months ago then..

 

A few months ago I was experimenting with mic designs using the electret element. I chose 1k ohm element from digi-key, p/n 102-1722-ND. The first pic is basically an astatic d104m6b modified using the electret element. It still has a nice mellow sound to it, kind of like fidelity.
The second picture is just a basic board using a 2n2222A transistor. Both mics have a nice clear sound thanks to the electret element. I had a pair of old ear phone foam covers that i used on the mic elements to act as a wind screen.