[Elecraft] When do I need atten or preamp?

[Bill Frantz]

This statement may not be true if you are using the weak signal 
modes which allow reception to as much as 20 dB below the noise 
floor. With these modes, you will still need to receive the signal.

(These modes work because the signal isn't random but the noise 
is. By averaging the signal and noise, the noise tends to cancel 
out while the signal comes through.)

73 Bill AE6JV

On 4/10/16 at 8:08 PM, alorona at sbcglobal.net (Al Lorona) wrote:

>Since it's not possible to hear signals below the external 
>noise floor, it doesn't buy you anything to have more 
>sensitivity than the noise floor.
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Bill Frantz        | Since the IBM Selectric, keyboards have gotten
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