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Surprisingly, I am unable to find much info comparing these two antennas. Essentially, they are the same except the one is shorter and top loaded with one wire. Does anyone...
Asked on 09/27/2021 by Synaps3
2 answerI'm just trying to make sure I understand the theory correctly. I have some triband VHF/UHF/800MHz antennas, I need to mount on a tower so I plan on using a...
Asked on 09/27/2021
3 answerIt seems common knowledge that a choke at the antenna feedpoint stops the outside of the coax shield from radiating when transmitting into the antenna. But what about stopping...
Asked on 09/27/2021
5 answerFor a $N$-element planar phased array, all the elements are same isotropic antennas. Then, what is the effective area of this array? Is it$$A_e=frac{lambda^2}{4pi}GN$$where $G$...
Asked on 09/27/2021
1 answerI am beginner in designing GNSS receiver design and facing concern while testing the high precision GNSS survey.I am using GNSS survey grade antenna for my GNSS receiver application testing,...
Asked on 09/27/2021 by BalkisMM
1 answer43' vertical monopoles sometimes are used with an auto-tuner at their input as radiators in the ham bands from 40m through 10m, but are any performance compromises required to do...
Asked on 09/27/2021
1 answerhttp://www.hamqsl.com/solar.html Why is 40m shown as "fair" while 20m is "poor" during the day. Shouldn't 7 MHz be getting absorbed by the D-layer more than 14 MHz?...
Asked on 09/27/2021 by Macuser
2 answerfriends! Finally found my next antenna project..a collinear dipole array for the 70cm US ham band. The general idea: (image...
Asked on 09/27/2021 by user14945
1 answerI don't "get" CW. I can't understand the chatter on an FM radio broadcast when my radio is set to AM. This makes sense, the signal is modulated using frequency...
Asked on 09/27/2021 by Cimm
3 answerA quartz crystal is often represented by this equivalent schematic: simulate this circuit – Schematic created using CircuitLab How to measure quartz...
Asked on 09/27/2021 by Phil Frost - W8II
2 answerGet help from others!
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