TV signals:
http://www.tvfool.com/?option=com_wr...e2cb66d645b7e9
Strongest TV signal is WUNI at -62.4 dBm = -13.6 dBmV
max input of 7777 = 15 dBmV
-13.6 dBmV + ant gain 13.7 dBd = 0.1 dBmV, no preamp overload from WUNI
-62.4 dBm + ant gain 13.7 dBd + preamp gain 30 dB = -18.7 dBm, no tuner overload
FM signals:
http://www.fmfool.com/modeling/tmp/7...5/Radar-FM.png
strongest FM signal WORC = -26.7 dBm
-26.7 dBm + ant gain ~6 dB = -20.7 dBm = 28.1 dBmV, preamp overload
turn on 7777 FM filter
28.1 dBmV - 15 dB = 13.1 dBmV, preamp probably OK, no guarantee
WORC freq 98.9 MHz
External FM filters getting hard to find; no more Radio Shack, or MCM, except maybe on Amazon or Ebay
Antennas Direct has a few left; when they are gone, no replacement
https://www.antennasdirect.com/store...on_filter.html
Insertion loss for TV signals probably about 1 dB.
A HLSJ can also be used as an FM filter:
