> The only thing to remember is that you can not have gain in an antenna
> unless you have directivity. Gain in a particular direction comes from
> reducing it in other directions.
It depends on what the reference antenna is.
An isotropic radiator has several dB gain over a GAP vertical on 80
meters, even though it is less directional.
Gain is a function of efficiency and directivity, while for receiving
efficiency can be pretty much left out...at least within reasonable
limits.
The only reason I brought this up is people commonly think
anything they do to increase gain by lowering feedline or antenna
loss helps on receiving a similar amount...yet clearly that is not
true.
73, Tom W8JI
W8JI@contesting.com
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