In the remote chance that someone else is tracking down a similar problem, I eventually tracked this issue down to a bad solder joint at R94 (in the transmit buffer circuitry). Thanks to Don, W3FPR, for his (now legendary) assistance! 73,Steve VE3SMA From: Steve Kavanagh <[email protected]> To: "[email protected]" <[email protected]> Sent: Saturday, November 8, 2014 10:42 AM Subject: [K2] Low TX Output on Higher Bands As I proceed with checking the new-to-me (S/N 5133, bare-bones, no options) K2 out, I'm finding that the maximum transmit power output drops markedly as the frequency goes up. If I set the power to maximum, I can get the following approximate powers (on CW):
80m: 15 W 40m: 15 W 30m: 15 W 20m: 7 W 17m: 4 W 15m: 4 W 12m: 1.5 W 10m: 1.5 W I've done a few rudimentary checks which I won't list in detail here for now. All transmit tests were done into a dummy load with a good SWR and power levels shown on the K2 LCD and an external meter agreed as well as might be expected. Do these symptoms sound familiar to any of you, or will I have to start a full troubleshooting process? It might be the same as observed by W6ICM ( http://elecraft.365791.n2.nabble.com/K2-low-output-tt461601.html). Are there any other theories? 73, Steve VE3SMA ______________________________________________________________ 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]
