All, I have what I think is an output issue with my K3 s/n 281. When set at 100W output, I am getting the following approximate output values:
10m ~55w 12m ~40w 15m ~50w 17m ~60w 20m ~60w 40m ~70w 80m ~70w 160m ~70w My testing methodology involved connecting the short (~12") coax out of ANT1 to an HF power meter's input. I then connected the power meter's output to a 300w dummy load. I then tuned to the band to test, put the rig in CW mode, and keyed down for a few seconds. The power meter is set to read peak output, not average output. As a self-check, I would randomly run the test using AFSK-A RTTY, just as a double-check to ensure I was getting 100% duty cycle. The results are the same. After discovering these power output values, I ran the TX Gain Calibration via the K3 utility. It ran through the 5w and 50w calibration tests successfully. After running the TX Gain Calibration, my output power readings didn't change significantly. My readings then are: 10m ~50w 12m ~60w 15m ~50w 17m ~60w 20m ~60w 40m ~70w 80m ~70w 160m ~70w Is there something else I should check before I plan a call back to the Elecraft mother ship next week? If it needs to go home for repair and testing, it will have to wait until after the Georgia QSO Party the second weekend in April. I'm getting good signal reports when I'm on the air, but it seems odd to me that, with the rig set for 100w out, and in a full duty cycle mode, I'm only getting 50%-70% of my rated power. Thank and 73, --Ian Ian Kahn, KM4IK Roswell, GA EM74ua km4ik....@gmail.com 10-10 #74624 North Georgia Chapter #2038 PODXS 070 #1962 K3 #281, P3 #688 KAT500 #860, KPA500 #1468 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
