Thanks for the exact location report; the signals are slightly stronger.
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The antenna I made is this one:
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That antenna isn't an optimum design, but with signals that strong it has more than enough gain. Did you add a reflector to make it directional? A reflector can eliminate multipath reflections which can be a problem for an indoor or attic antenna.
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Would fm interference cause the drop outs as well?
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Yes; you can add an FM filter. Antennas Direct has an FM filter; you might need 2 in series.
https://www.antennasdirect.com/store...on_filter.html
I redid your FM report to match your new TV report; the signals are still very strong:
http://www.fmfool.com/modeling/tmp/4...e/Radar-FM.png
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I have a CM 7777 at home with a switch that says FM trap that I leave in (on).
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Yes, some preamps have an FM filter, but as rickbb said
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Don't use the pre amp, you're already getting too much signal now.
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Do they accomplish the same thing?
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An FM filter makes the FM band signals weaker; an attenuator makes all signals weaker.
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I take it there are no good indoor "rabbit ears" for a situation even this close to the transmitters?
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Many people have had good results indoors with the Antennas Direct C2V. If you buy the BestBuy C2-V-CJM version, I think it comes with an indoor base.
https://www.antennasdirect.com/cmss_...ickStart_f.pdf
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Rabbit, can you give me a link to an example of an anttenuator?
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A splitter can be used as an attenuator. A 2-way splitter gives 3.5 dB attenuation; a 4-way, 7 dB. But you might need more than that. Antennas Direct makes a variable one:
https://www.antennasdirect.com/store...ttenuator.html
There are inexpensive fixed value attenuators:
http://www.3starinc.com/drop_in-line_attenuator.html
http://mjsales.net/collections/atten...ant=1083705673
Attenuation values 1, 3, 6, 8, 10, 12, 16, 20dB (FAM)
click on 1 dB for other values; the up and down arrows are faint
The attenuator will make the TV and FM signals weaker.