The "antenna tuner" is part of the antenna more than it is the rig, even if it is inside the box!
I have a L-net tuner (a circuit like in the Elecraft ATUs) consisting of a large ceramic roller inductor and a "transmitting" type variable (0.3" plate spacing) that I use with my Inverted L. It works beautifully on all bands, even where the impedance is so high a neon bulb on the shelf near the tuner flashes when I transmit. Compressing a tuner enough to fit inside of an amp or a K3 means compromising on what sort of voltages can be tolerated. That is why you can't get too close to 1/2 wavelength, even though 1/2 wavelength is where the antenna will be the most efficient. Engineering is always a tradeoff. 73 Ron AC7AC -----Original Message----- From: Elecraft [mailto:[email protected]] On Behalf Of Lynn W. Taylor, WB6UUT Sent: Sunday, January 29, 2017 1:02 PM To: [email protected] Subject: Re: [Elecraft] Random wire lengths for antennas Not an alternate definition, but we have to recognize that just any old random length won't work. If the wire is near 1/2 wavelength on a band, the impedance at the end will be very high, and the tuner may not be able to match it. In truth, we're really talking about non-resonant antennas, so numbers like 53' keep coming up. It was easier before 60m and 30m and 17m and 12m because all of the ham bands were harmonically related, and the math was simpler. 73 -- Lynn On 1/29/2017 7:55 AM, Tom McCulloch wrote: > I guess we need an alternate definition of "random" ;-) > > Tom > > wb2qdg ______________________________________________________________ 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]
