"Rollie" wrote in message
...
www.qsl.net/k5lxp/projects/SMeter/SMeter.html

Check the chart to see actual input readings. I've always used the (6db
per
S unit) as a general rule-of-thumb.



The chart is interesting. Where the "S-Meter Standard" numbers come from,
in blue on the left? If I were to create such an "S-Meter Standard" chart
myself without source or authentication, I might be inclined to set S-9
equal to -73 dBm/50 uV and extend the S-values down from there at the
popular rate of 6 dB per S-unit.

Chart values do decrease at 6 dB per S-unit but the chart sets -72 dBm/56.8
uV as S-9, vice 73 dBm, 50 uV. 1 dB isn't much to quibble about, but it
does make me inquire about the source of the data.

Can anyone elaborate? TKS

BTW, http://en.wikipedia.org/wiki/S_meter provides a similar chart based
around 73 dBm as S-9. It sources IARU Region 1 Technical Recommendation
R.1. I looked for it; no luck.

Sal