sogs wrote:
What's the difference between an amplified multicoupler and an
amplifier?


The amplified Multicoupler only has a 4 dB amp, just enought to overcome
the looses of the multicoulper itself. You can buy an un-amplified
multicoupler however each scanner connected would experience a 3dB loose
in signal.

A pre-amp is an amplified designed to actually increase signal, usually
10 dB - 30 dB.

George
http://www.MilAircomms.com