[Elecraft] KX3 XG3

[Mark via Elecraft]

Jeff,




Re:  when I cable the xg3 to the kx3, and set the mode to cw, normalize the
filters, and set the xg3 to -73 dbm....I read a S-5 reading the S-meter…I would expect a S9 reading.




Having a family get-together here, so haven't have a lot of time, but I sneaked away for a few minutes to see what mine read since I noted anomalies when I received my XG3 a couple of months ago.  Here is what I found today with my KX3:




Initially, with a -73dbm signal from my XG3, my KX3 read one segment (5db) over S9  (40m).  Not too bad.  Then I increased the XG3 output to -33 dbm, and the S-meter read 25db over S9.  Returning the XG3 to -73 dbm gave an S-meter reading of S7 instead of the previous 5 over S9.  I have seen this behavior in the past, but…




I turned the radio and XG3 off for an hour and went back to it and checked the -73 dbm setting again and now I get S7 consistently.  That surprised me, as I expected it to match the 5 over S9 I got the very first time I tried it.  I cannot explain why I got 5db over S9 initially.




I just tried the same thing on 80m and could not duplicate it there.   No matter what I did there, I always got S9 with a -73dbm input.  I will probably play with this some more when I get some time, but it is just a curiosity for me since I don’t use the s-meter all that often, and then only for relative readings to get a feel for what the band is doing, or for tuning signals.  I don’t often care what the actual number is.




Mark

KE6BB
So many variables between the transmitter and the S-meter, so little time.










From: Jeff Herr
Sent: ‎Sunday‎, ‎August‎ ‎24‎, ‎2014 ‎07‎:‎58‎ ‎AM
To: elecraft at mailman.qth.net





when I cable the xg3 to the kx3, and set the mode to cw,normalize the
filters,and set the xg3 to -73 dbm....

I read a S-5 reading the S-meter.

all per-band preamp settings are 20db - default (6m is 30db - default)

I would expect a S9 reading.

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