[Elecraft] S-Meter Sensitivity

[k6se@juno.com]

Hi, Don,

You wrote:

"I just checked four K2 radios I have in my lab and the CAL S HI needs to
be reduced to around 10 to 12 to get a reading of S9 with the corrected
setup above. This means the S-meter does read a little low on these
radios with the manual calibration."
==========
Reducing CAL S HI by a count of 10 to 12 sounds like quite a bit.

If those four K2s had their S-meters calibrated to S9 as per the
procedure in the manual, how many uV would it take for them to read S9? 
This would give us all a pretty good idea of the S-meter sensitivity of
the average K2.

I'm curious to know, with your S-meter calibrated as above, how many uV
does it take for the your S-meter to read S5,  20 over 9, and 40 over 9
(the other front panel markings for the S-meter)?  Does it retain
reasonable accuracy (where S5 is approx 4 uV, 20 over 9 = 500 uV and 40
over 9 = 5000 uV)?  For S5 I'm assuming that each S-unit is 6 dB (which
means a reading of S1 would require a signal 48 dB below 50 uV).

73, de Earl, K6SE
67 countries with K2 #2622 and counting.....