A DA is appropriate when splitting many ways. A preamp is appropriate when dealing with low NM at the antenna and/or splitting many ways.
A NM of 37 dB is not a low figure... Is your antenna aimed directly at that station? Are you using a single antenna? Your previous posts indicate a CM-3016.
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If the well is dry and you don't see rain on the horizon, you'll need to dig the hole deeper. (If the antenna can't get the job done, an amp won't fix it.)
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Last edited by GroundUrMast; 19-Oct-2011 at 5:44 PM.
Reason: Clarity
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