You can always use impedance transformers to bring your match back within the "impedance range" of your tuner. These cost far less per unit price than the components required to beef up an internal tuner to handle impedance's of 500-800 ohms or more (or the conjugate) with a solid state amp.
A simple 3:1 impedance transformation is not expensive in terms of components and allows you to flatten out the band edges of a dipole or beam. Out side of this your amplifier is asking you to pay attention. For those wanting to use antenna with high impedance (or very low impedance) feed point there are tuners already that will suit your purpose. Thinking about that it would be nice if the KAT1500 could have some form of tuner interface (like the Icom and Kenwoods) where an external tuner can be activated, RF applied and held until the tuner releases the tune line. In the real world as you put it capacitors look like door knobs and inductors are large enough to stand in and everything is silver plated. There's that pesky issue with the voltage being the square of the current for a fixed impedance, it does take long for things to get nasty as you increase the current by 1 or 2 amps at a time. 73 Matthew VK5ZM On 29 March 2017 at 10:00, brian <[email protected]> wrote: > KAT500 handles a much wider SWR range (like to about 10:1). > > Why do you assume people are lucky enough to have antennas with no more > than a 3:1 SWR across the ham bands? > > Yes, higher SWR's require beefed up components but welcome to the real > world. > > 73 de Brian/K3KO > > > On 3/28/2017 23:00 PM, Paul Van Dyke wrote: > >> Ralph Parker said my list..... >> >> 1500w output, 160 - 6m. >> 2 inputs. >> 4 outputs (Manual switching is OK). >> Built-in antenna tuner (good for 3:1 SWR). >> Reasonably quiet fans. >> Separate p/s, or remote control head (space considerations. :-) >> >> Paul. KB9AVO >> >> On Mar 28, 2017 4:40 PM, "Ralph Parker" <[email protected]> wrote: >> >> I better post this before I'm too late. >>> >>> I'd like: >>> All the features of my KPA500, plus >>> 1500w output, 160 - 6m. >>> 2 inputs. >>> 2 outputs (or more. Manual switching is OK). >>> Built-in antenna tuner (good for 3:1 SWR). >>> Reasonably quiet fans. >>> Separate p/s, or remote control head (space considerations). >>> (I understand the difficulty of getting high power from the p/s to >>> the >>> PA.) >>> I don't expect to carry it around, so weight is not a problem for me. >>> Expeditions can use the KPA500 :-) >>> >>> When this amp is available, I'll sell amplifiers Ac and Am and buy one. >>> I'm keeping my KPA-500! >>> >>> Ralph, VE7XF >>> >>> ______________________________________________________________ >>> 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] >>> >>> ______________________________________________________________ >> 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] >> >> ______________________________________________________________ > 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] > ______________________________________________________________ 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]
