includes phantom power supply.
http://www.tangible-technology.com/tubes/altec.html
This project is a miniature, VHF FM (wideband) Wireless Microphone transmitter of the type that are commonly refered to as BUG's.
http://w1.859.telia.com/~u85920178/tx/bug.htm
Switches automatically from sound source to microphone when enough sound comes in from microphone.
http://www.zen22142.zen.co.uk/Circuits/Audio/v_over.htm
uses special amplifier module from Op-Amp Labs.
http://www.opamplabs.com/2wrmic.htm
simple one transistor circuit
http://www.tkk.fi/Misc/Electronics/circuits/micamp.html
Modifications.
http://www.gweep.net/~rocko/PZM/
and Artificial Earth
http://sound.westhost.com/project32.htm
http://www.uoguelph.ca/~antoon/circ/amp2.htm