On 8/13/2017 9:09 AM, Walter Underwood wrote:
The 16 foot wire on the ground is a radial “system”. One radial is a lot better than none, but you could use more. The length isn’t especially important
Right.
because it is capacitively coupled to the ground.
It's also inductively coupled. BUT -- that's NOT how or why radials work. AND a connection or coupling to earth does NOT make a transmitting antenna work better. That's because the earth is a big resistor, so it burns any power fed into it, whether with a direct connection or by capacitive or inductive coupling. In other words, it WASTES transmitter power.
Ground resistance swamps any resonance.
Yes, but as noted above, not in a good way. :) There's a folded dipole antenna made with a big resistor in the middle of it, the effect of which is to "broadband" it by "swamping" the resonance, AND to burn half of the transmitter power. In other words, the transmitter puts power into the antenna, but half of it is wasted in that resistor.
73, Jim K9YC ______________________________________________________________ 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]
