Re: K3 utility and calibrate RF gain

Posted by ab2tc on Aug 12, 2009; 11:04pm
URL: http://elecraft.85.s1.nabble.com/K3-utility-and-calibrate-RF-gain-tp3434334p3434500.html

Hi,

I have just installed this and run the "Calibrate RF gain" and I am impressed with the improvement. My S-meter was accurate at S3 and S9 but grossly exaggerated beyond S9+10. After calibration it remains accurate at S3 and S9 (needed no further S meter calibration) and now is much better at high signal levels. Unfortunately my modified XG1 (normal XG1 + 40dB) had been left on and run down the battery so I have only been able to test the higher levels by comparing K3 and LP-Pan/PowerSDR readings on strong 40m AM stations, but they are quite close. This also much improves the S-meter when backing off on the RF gain. Very useful improvent and the first one in months that prompted me to upgrade.

AB2TC - Knut

Dave G4AON wrote

I've just tried this with the new utility (and f/w 3.25). After running
the gain calibration and then calibrating SMTR OF and SMTR SC, the K3
S-meter did give remarkably accurate readings.