Note that "No Tune" means, simply, "Fixed Tuned", set for a 50 ohm non-reactive load on each band. If we don't have an antenna reasonably flat across the whole band we add an "Antenna Tuner" to the output which is simply moving the tuning we used to do on the xmtr output to an outboard box!
For example, when you add a KAT3 to the K3 it's all in one box, so we operate just like we did decades ago, tuning our rigs for the band/frequency in use. Only now the tuning is done automatically under digital control, so we don't need to look at meters except to confirm the automated circuits did their job correctly. It's the speed of the logic controlling the "tuner" that makes modern rigs so fast on the QSY, not any lack of need to "tune" them for a given load. There is a hidden advantage to all of this. The output filters are far more exotic than the simple Pi and Pi-L networks rigs used in the days when one "dipped the finals and adjusted the loading". Those networks provide for superior rejection of spurious products. 73, Ron AC7AC -----Original Message----- RE: memo below. Excuse me, but there were (are?) lots of "no tune" rigs that use tubes. I used one (an Alpha 78) over 25 years ago. Of course, since then, I've been a QRPer, so moot point for me. de Doug KR2Q >Yes, it *has* to be solid state. It would be complete insanity for Elecraft Agreed - a new tube design would be moving in the opposite direction on the technological timeline. I operated the ARRL DX contest with K3/AL80BQ (QSK). Bandhopping was slowed by the need to tune the amp each time ______________________________________________________________ ______________________________________________________________ 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
