An owner of a K2/100 (S/N < 2000) showed me the follwing problem: it looks as if the mic drive were not enough for driving 100 watts USB on 17m band. A whistle test could only reach abt 20 watts.
However, on LSB the same whistle test produces full power output. Playing with CAL FIL, I moved BFO frequency to the wrong side of bandbass, effectively making LSB instead of USB. It is definitely useless on the air, but full power output was reached in this test. How do you think, where can this kind of difference between "right" (USB) and "wrong" (LSB) sideband reside? Up to now, I can only think about L34 on RF board, but isn't the Q there too low to make such a difference between sidebands? Builder Alert #22a is the closest thing I found on the web, but, again, that would influence both sidebands. -- View this message in context: http://n2.nabble.com/K2-KPA100-above-20m-not-enough-drive-on-USB-LSB-fine-tp4780388p4780388.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
