[Elecraft] K3S DSP Filter Plots

[Bob McGraw - K4TAX]

The original S meter development for HF radios was done by Art Collins.  
At that time the number used was 100 uV for S-9 to coincide with the RST 
system.  Later the value was revised to 50 uV for S-9.  Values above S - 
9 are stated usually in dB although I've seen some in microvolts.  If 
one ventures into the VHF spectrum then the value changes.  {I forget to 
what value}

73
Bob, K4TAX

On 11/18/2015 3:31 PM, Fred Jensen wrote:
> I believe there's more than one correct answer.  In earlier times, the 
> "Collins Standard" was 6 dB/S-unit and 50 uv = S9.  My 75S3 came in at 
> 53 uv for S9, and pretty much held to the 6 dB/S-unit below that.  Not 
> so much above S9