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I think there are some concepts here that are out of reason about 'noise'. Antennas are terrible noise 'filters', they just can't/don't do that without reducing their efficiency. (Another aspect of that 'reduced efficiency' is usable signal bandwidth which is indirectly proportional to efficiency. The 'wider' the band width the less efficient the antenna, which also seems to be what's happening in the examples given here, right?)
Atmospheric noise doesn't affect a transmitted signal. It certainly does affect how that transmitted signal is received. So that 'distinction' is invalid to start with.
I think it's fine to question things, but there are limits to what's validly questioned.
- 'Doc

[QUOTE="W5LZ, post: 418664, member: 129"] I think there are some concepts here that are out of reason about 'noise'. Antennas are terrible noise 'filters', they just can't/don't do that without reducing their efficiency. (Another aspect of that 'reduced efficiency' is usable signal bandwidth which is indirectly proportional to efficiency. The 'wider' the band width the less efficient the antenna, which also seems to be what's happening in the examples given here, right?) Atmospheric noise doesn't affect a transmitted signal. It certainly does affect how that transmitted signal is received. So that 'distinction' is invalid to start with. I think it's fine to question things, but there are limits to what's validly questioned. - 'Doc [/QUOTE]

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