WebWe're both fans of loop antennas so we decided to take a look at a vertically mounted 1/8 wavelength 40 meter rectangular loop antenna fed at the bottom with 300 ohm twin-lead. We "fired up" EZNEC+ v.5 and cranked in the numbers using 16.5' for the sides and 20' for the height. EZNEC predicted an unacceptable SWR curve over the 40 meter band. Web1,643 Likes, 9 Comments - Shashank Gururaj Kashyap (@incredible_indian_railways) on Instagram: "The Raging Long Hood EMD Monster + Dust Storm South Western Railways ...
Manual 1:2 BalUn 600 Watts for Delta-loop & Quad-loop antennas
WebApr 29, 2024 · As it turns out, I had only an SWR meter and a 40 channel radio. The tube was 1-1/4" diameter, and the length was 8'-3" per side. "My swr is 1:2:1 @ channel 40 and 1:0:1 @ channel one." Had I trimmed off a little more from each end I likely would have seen the SWR curve shift a bit more centered. WebMay 27, 2024 · The above data from K1RF shows that the SWR for 20 meters (my dark red markings - SWR scales differ in each graph) is about the same with or without a capacitor in the transformer primary.The effect of the capacitor is very apparent for 17 meters and above, flattening and lowering the SWR curve through 10 meters. dj naija mix 2022
Smith Chart Tutorial - Load Transformation - Antenna Theory
WebThe SWR plot now shows five SWR dips in the 1-30 MHz range, none in an amateur radio band. Of course, ... These dips are not as deep as without the terminating resistor, but the SWR curve as a whole has come down a bit: SWR plot of my Terminated Folded Dipole with a 450 Ω resistor - without balun at the feedpoint. WebSWR is read directly from nine red SWR curves that range from 1:1 to infinity. SWR is measured by observing the point where forward and reflected meter pointers cross. The … WebSWR Curves So far, we have restricted ourselves to a specific design frequency, 28.5 MHz. However, in the examples, I was interested not in one frequency, but in the entire first MHz … dj nails miramar services