I can’t help but think we’re over-thinking this. I think the original post was regarding ‘portable' operation. When I go portable I don’t carry a large antenna with lots of wire or weight. I usually carry a 41’ (non-resonant) wire with a 9:1 unun rated at 300w watts, and a throwing line and weight to get the far end of the wire up in a tree. I have a large OCFD and a 40’ fiberglass’s mast to get it up, but frankly, for quickie portable, getting the center pole staked and up and guyed is more trouble than its worth. If it was for a weekend or a week, maybe. But I’d rather spend the time operating. I’ve used the simple wire with both a K3 and KX3 with internal ATUs. Works fine. Nothing has ever cooked. The internal ATUs typically get SWR to 1.2:1 or better. Feedline is 25 feet of RG-58 choked off a foot before the radio termination.
Sure, some power is getting lost in the tuner, the balun, the feedline, the connectors, human absorption, whatever. But … Grant NQ5T > On Dec 13, 2020, at 2:19 PM, donov...@erols.com wrote: > > Examining the KAT3A circuit board, I doubt it can handle more than > 1000 volts that a worst case random wire -- or a fault -- could cause > at the output of the KAT3A tuner when the K3 is producing full rated > output. But its unlikely that the KAT3A can produce full rated K3 > output because of inevitable low tuner efficiency at high VSWRs. > > ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
