We know that limiting the noise pick up from more directions of an antenna we
can usually hear better. We also know if we limit the noise from a receiver IF
we can hear less noise, and better yet, if we
have a roofing filter earlier in the receiver we can eliminate even more noise
in relationship to the wanted signals.
What if we take it a step further, could we limit the band-with of the antenna
signal with a crystal lattice for 160 meters before the receiver.
Years ago I played around with a single crystal at the input of an old tube
type receiver. It was remarkable what I could hear on 40 meters, on what seemed
to be one frequency.
73
Bruce-k1fz
http://www.qsl.net/k1fz/beverage_antenna.html
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