I just noticed that one of my K3s seems to have a power out issue. Specifically, when keying for the first time, the output power seems to be overshooting what it is set at. If I continue to send CW at the same power it is fine. If I decrease or increase the power the output overshoots what it is set at and them comes back down. If I change bands, even without changing the power level, the power overshoots the power selected for the first few dahs.
How do I know this? Well, the configuration is a K3/100 and an Acom 2000A. The Acom forward power LEDs overshoot the 1500 watt limit and then come back down. It should take roughly 50w to drive the Acom to legal limit. However, if I set the power on the K3 to 45 the Acom reads 1600 and then drops to 1400 on the third dah. If I set the K3 to 50 watts the Acom reads 1800 and then drops to 1500 on the third dah. This suspect K3 used to have an Ameritron AL1500 connected to it so this issue could have been occurring for some time and I would not have known it. So you say why do I suspect the K3? Well, I have (2) K3/100s and (2) Acom 2000As and the ONLY time this happens is if either Acom is connected to the suspect K3. The other K3 when connected to either Acom is just fine. The power reading on the Acom connected to the good K3 is as it should be constant. Additionally, the power output reading on the K3 RF power scale overshoots the selected power and then comes back down to the power selected. It is just not as noticeable as the Acom RED Leds. I went through all the memory settings on both K3s and they are identical. I did calibrations on both K3s at 5w and 50w and the problem stays with the suspect K3. Both K3s are at the following uCode levels: 4.60 / d1 = 2.8 / d2 = 2.8 / FL 1.15 Ø Yes, I did a u-code reload Both K3s have all the same updates installed The suspect K3 is serial number: 1193 The working K3 is serial number: 1062 Anyone have any suggestions? Thanks and 73, Bruce N1LN ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
