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Old 19-May-2016, 12:53 PM   #2
Retired A/V Tech
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,708
I suspect that electrical noise interference has raised the noise floor which will mask your weak signals.

Is the coax grounded with a grounding block connected to the house electrical system ground to reject interference?

You can hunt for electrical interference with a portable radio that will tune the AM broadcast band. Tune to a frequency not in use at the low 550 end or the high 1600 end. You can also use the AM radio in your car or a portable radio that tunes the aircraft band which is AM. An FM portable is not suitable for noise hunting.

Your previous thread:
Preamp vs Distribution amp for outdoor FM antenna
If you can not measure it, you can not improve it.
Lord Kelvin, 1883

Last edited by rabbit73; 19-May-2016 at 1:08 PM.
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