Topband: Slightly OT - amplifier noise

[Jim Brown]

On 3/14/2020 3:17 PM, Richard (Rick) Karlquist wrote:
> I am trying to understand what these noise cancelling
> schemes do that couldn't be done with a simple loop
> (rotating the loop until the noise drops into one of
> the null directions).

I can't find the very recent email where this example was cited to quote 
it, but the op had a noise source coming from the same direction as 
desired signals, so he placed a sense antenna very close to the source.

Another good advantage to the electronic schemes is that you don't have 
to go outside to rotate them when the noise that's bothering you is 
coming from a different direction.

73, Jim