I've observed metering fluctuations as well. Equipment: K-line. ALC off Operating mode: Amplifier output direct to dummy load or antenna -- same observed behavior with either load. Constant power, e.g. CW All cable verified as good.
1. KPA500 LED Power Indication -- In standby or operate, the last power LED flickers. In Standby, at any drive power, the last power LED flickers. In Operate, at any drive power, the last power LED always flickers. 2. KPA500 SWR metering -- always stable 3. KPA LCD Analog power metering -- In standby, the meter is stable; i.e., with 100 watts drive -- indicates 100 watts. In operate, at any power level, the analog meter fluctuates. The amount of the fluctuation is difficult to discern since it varies rapidly. 4. Peak Hold -- when in Peak Hold mode, the last power LED's are stable, but occasionally in Operate, the next to last LED flickers. K3 metering stable. When monitoring the K3 or KPA power output on Elecraft W2, the power indication is stable. Question: Is this a KPA500 metering anomaly? Or is this an indication of a power supply noise problem, e.g., power supply hum? No one has complained of hum. I did get one and only one comment from a discerning individual that there was audio break-up at peak modulation. I've not yet rigged up a scope on the PS, pending comment from others. Dan AC6DM -- View this message in context: http://elecraft.365791.n2.nabble.com/KPA500-power-fluctuations-tp7590332p7590951.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ 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 Message delivered to [email protected]
