I have a K3, P3 and KPA500. Last night I was encountering some high SWR. The K3 has the KAT3 internal 100 watt antenna tuner. I do not have the KAT500 tuner. If the SWR was too high, the KPA500 indicated a fault and I went back to 100 watts with the K3. I tried bypassing the KAT3 to see how the SWR looked. The K3 started producing extremely distorted audio when I transmitted (I was listening with my headphones). The audio sounds like a loud roar. This only occurred on 20 and 30 meters at about 50-100 watts output using upper sideband (yes, I know we can't legally use USB on 30 meters, I just briefly keyed the PTT). The other bands were fine. Today I found the problem does not happen when I use a dummy load. The K3 schematic shows`there is a low-pass filter for 20/30 meters. I am just trying to figure out if the high SWR caused damage.
73, Dave W0RU -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Distorted-Audio-On-Transmit-tp7584901.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
