[Elecraft] TX Gain Calibration Fails on 6 meters

Bob McGraw K4TAX rmcgraw at blomand.net
Wed Mar 13 21:11:20 EDT 2019


My K3S s/n 10163 I find my results are the same as yours as below.

"On 6 meters the relay switches from LP to HP amplifier when the power is adjusted from 8 to 9W."

"On 160-10 meters I hear the relay switch from LP to HP amplifier when the power adjustment is increased from 12 to 13W as described."


Also noted with TUNE power set to 20 watts, all bands 160M - 10M operate 
normally at 20 watts displayed and measured. However on 6M when TUNE is 
activated the displayed power is 16 watts and the measured power is 16 
watts. When PWR is set to 20 watts, the measured output is 16 watts. 
However, If I set the PWR to 100 watts the measured power is 100 watts. 
On 6M if I set TUNE Pwr to 25 watts, when Tune is activated it displays 
21 watts and output is 21 watts. Clearly there seems to be an issue in 
firmware for 6M only. I recall sending the concern to Elecraft. At the 
same time, I don't consider it to be a major issue. 73 Bob, K4TAX




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