Hi Martin, unfortunately you can't test at 10ft and tune the driven element only. Neither adjusting SWR is the proper way to obtain reasonable F/B, BW and gain. Even tilting upward the antenna isn't
You forgot the only real advantage of a 2 elements quad over a 2 elements yagi, a better F/B. All the rest about gain, efficiency and take off angle is a pure mith, just like when an antenna manufact
Comparing apples with oranges may lead that a banana is longer. Differrent modeling software converge that gain of a 2 elements optimized quad is not significatively different than gain of a two elem
This is a correct point, but not the only reason to have a choke near the element. The piece of line that runs between the feed element and the coil is infact a part of the antenna, another antenna.
If you don't mind a single band device, then put two quarterwave 75 ohm lines, each one in series with each antenna line at the before the T; if SWR is good, then also the power is spliting reasonabl
Hi Dan, I've no experience with boom loaded dipoles, but with self supporting loaded dipoles on low bands yes. I think a 140 ft high dipole on 80m will be an efficient transmitting antenna meanwhile
I do not understand your answer. Do You mean that a parallel resonant circuit used as a trap is not reversible ? Why ? ones I must disagree, its a compromise. No one would use other than vacuum, air
A dual trace oscilloscope is a good instrument to check the phase (and balance) of KLM baluns. The balun on the installed antenna should be temporary removed and checked. In any case the coax to the
Rr has NOT to be confused with the resistive part of the complex impedance, in the series form, that one you're actually reading. In other words, if the resistive part of the complex impedance would
Many English words, especially in biology, medicine, and law, have been adopted from Latin or Greek. Although most English words form their plurals simply by adding the letter 's', this is not true o
Guy, things are different than you reported above (in Latin), and anywai I don't see why to be so excited for well known things. Subjective Antenna pl. Antennae Genitive Antennis Antennarum Dative A
The gap with vertical polarization over an average ground is in the poor energy radiated below the pseudo brewster angle and also the missing of signal enforcement (up to 6 dB) by ground reflections.
When one uses a very short vertical radiator, rarely it happens that a good and extensive RF ground system is instead available. All considerations about nearly good grounds and antenna loading are m
rrent This is correct if the antenna current distribution is or remains almost linear, in other words if the antenna is full size or only slightly loaded. Hence ve When an antenna is very short one
Transmitting is not everything and a dipole has a low rejection of unwanted signals from high angles, it's F/S is quite objectionable to be considered directivity at medium high elevations. If this w
Unless during flares, the 40m ground floor is definitely higher than average man made urban noise, at least here. In any case, after than having seen this concept "reprinted" for decades on books, i
An efficient dipole, placed at a minimum of 1/2 Wl from ground can have some transmitting gain on 40m when compared to a single element efficient vertical, may be... The calssical inverted V dipole o