"yes"
An amplifier can only amplify what it's fed, both signal and noise, and adds a little noise of its own. If it's positioned at the antenna it will work a lot better than if it's at the other end of the feed line at the radio. You want to amplify the signal before the noise induced by the coax can get in there.
Greg KO6TH
Albert Ozias via AMSAT-BB wrote:
Do preamps improve the signal to noise ratio or simply amplify signal and noise? _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb