Giulio, The load impedance was probably extremely low, and at full power on this particular band, the power-handling capacity of the 8.2-MHz IF trap was exceeded. It's possible that the trap was mistuned (too close to 40 or 30 m). Note that L10's winding is adjusted at the factory and should not be moved.
If you contact support, replacement components (L10 and the associated capacitor) will be sent out immediately. Support can also explain how to adjust the trap to 8.2 MHz (or the parts may be pre-calibrated as a pair -- they'll let you know). As a precaution, I will also be modifying the ATU matching algorithm so that it catches this case, preventing excessive reflected power that could damage the trap. I'm guessing that the load SWR was in excess of 10:1 or 15:1 at the time -- the KAT3 has a *very* wide matching range, and probably presented something close to 1:1 to the transmitter. 73, Wayne N6KR ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
