Originally Posted by ProjectSHO89
I found your suggestion to install FM traps to be quite interesting.
Have you any test data that indicates how much improvement in C/N ratio a typical viewer in your area might achieve with that simple step?
FWIW, yours is (so far) the only suggestion to install one of these that I've seen so far in discussing high-VHF reception issues on this forum.
We have no scientific data. We just found that in many cases they work.
We bought 100 of them and the receptionist hands they out like candy mints.
Where is really makes a difference is when a cheap pre-amp is in use. The good pre-amps have a built-in FM trap.
A strong FM signal can over drive the pre-amp and generate strange mixing products, particularly the 2nd harmonic. Channel 10 is 192-198 Mhz. A powerful nearby FM station at 96-99 Mhz can really screw things up.
Some set-top antennas have built in amplifers. If they have no FM trap and no way to bypass or disable the pre-amp they are useless in many cases.
We only recommend Channel-Master or Winegard pre-amps.