I recently decided to give my K2 (#3490) a tune-up. I hadn't done any alignment on it since I built it in June of 2003. Realigning the bandpass filters produced a noticeable improvement in receive performance. I have the KAT2 antenna tuner option in it, so I re-did the bridge null and power calibration adjustments.
However, now I notice that the power output as indicated in the forward reading in "ATU Pout" mode is sometimes quite far off of the power set with the POWER control. For example: POWER Pout 0.1 0.1 0.2 0.5 0.3 0.8 0.5 0.5 1.0 1.9 2.0 1.9 3.0 4.0 4.0 3.4 5.0 6.6 7.0 8.6 10.0 10.7 12.0 12.2 These are all into a known good 50-ohm dummy load. I'm particularly concerned that requesting 0.3 W with the POWER control puts out more power than when I request 0.5 W. Same between 3.0 W and 4.0 W. I don't remember noticing this 6 years ago when I first built the rig (and I didn't make any notes to that effect in my log), but then I don't remember if I compared requested vs. measured power output back then. I've checked continuity of the control cable between the KAT2 and the control board and all conductors are OK. Before I dig deeper, I wanted to ask if these reading might indicate a problem, or is this just the nature of the beast? 73 -- Joe KB8AP ______________________________________________________________ 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
