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TRANSCEIVERS HAVE A LOW VOLTAGE AVAILABLE ON THE MICROPHONE INPUT TO POWER
THE MICROPHONE.  THE CONDENSER MICROPHONE ALSO HAS EXTREMELY GOOD TRANSIENT
RESPONSE.  THIS IS THE INSTANTANEOUS RESPONSE OF THE MICROPHONES DIAPHRAGM
TO THE AUDIO WAVE THATS MOVING IT.  IT IS THE MOST FAITHFUL OF ALL THE
MICROPHONES BECAUSE THE MOVEMENT OF THE DIAPHRAGM IS EXTREMELY SMALL, AND
THE DIAPHRAGM ITSELF IS EXTREMELY THIN, WHICH AFFORDS A VERY FAST AND
FAITHFUL RESPONSE TO THE AUDIO WAVEFORM THAT EXCITES IT.  THIS IS GOOD IN A
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QUIET ENVIRONMENT SUCH AS A RECORDING OR BROADCAST STUDIO OR QUIET HAM
SHACK, BUT IT CAN BE PROBLEMATIC IN A HAM SHACK WITH NOISY FANS BECAUSE
ITLL PICK UP EVERY SOUND WITHIN ITS ENVIRONMENT.  RIBBON AND CERAMIC RIBBON
MICROPHONES, SUCH AS THE ALTEC 639, WERE POPULAR IN THE GOLDEN AGE OF RADIO
AND HAVE GOOD FREQUENCY RESPONSE BUT A RELATIVELY LOW OUTPUT, AND ARE HEAVY
AND EXPENSIVE.  CERAMIC OR CRYSTAL MICROPHONES, SUCH AS THE ASTATIC D104,
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