[Elecraft] Sensitivity - Was K4 Observations

[Jim Brown]

On 5/19/2019 6:28 AM, Joe Subich, W4TV wrote:
> if the "effective" bandwidth
> for CW is on the order of 100 Hz a CW signal right at the noise
> in the 100 Hz "ear/brain filter" would be -14 dB in a 2500 Hz
> wide SSB filter. 

This estimate correlates well with my own that FT8 can work about 10 dB 
deeper into the noise than CW with good radios and very good operators 
on both ends. I've worked a lot of both modes.

On 5/19/2019 6:50 AM, Wes wrote:
> FT8 reports negative SNRs number but we both know those are bogus.

Not if you read the definitions within the WSJT-X docs. Joe has done 
that, and correctly interprets the numbers.

73, Jim K9YC