This is "pulse noise" generated by ignition sparkplugs, or other arc bursts of energy. It is true that much, or maybe even most, electrical noise has a vertical component. Why must you use a horizontal antenna? This is often done so as to improve "Signal to Noise Ratio". I think that part of the fun is to de-bunk such ideas! It is also fun to learn the perspective of any amount or shred of truth that might be contained in such broad statements! Let's take a look at each one of these and see what might have been meant by any negative aspersion, and lets see if we can benefit from the contrasting truths.
Noted fables that I have heard through the years are:ġ) You must use horizontally polarized antennas!ģ) Vertical omni-directional antennas will not work on 6 Meters for DX!Ĥ) "J" or J-pole antennas are less efficient than Ground Plane antennas! The counterpoint of this is when we run into people who will tell us that this is not important, fun, or that there are only certain ways that WE MUST PROCEED in these endeavors. My point is that it is fun and interesting to exploit these methods of signal propagation, and learn about them. When you can have bands of frequencies where signal propagation can be facilitated by the exhaust gasses of jet aircraft, that's Magic, and of course I don't mean that in a literal sense. These are the physical elements that make the Magic! You see when you have bands of frequencies that can be propagated by ducts of differential air temperature, that's pretty magic. Knife Edge Refraction over mountain tops, not too great for distance, but fun!
#Simulcatst multipatch plus
Tropospheric Ducting, at weather plus maybe E, or F layer events. Meteor Scatter (skip) several times each and every year (at regularly noted meteor showers.Īuroral Skip, at times when major solar events ionize the D-layer of the ionosphere. Now with this next band, 6 Meters, I have lots of experience, about 38 years worth! It is a truly magic band, although I feel the same way about several bands above it! Anyway, 6 Meters will avail itself of all of these below listed forms of distant (DX) communication:į-layer skip every 11 years at or near the Solar peak- along with the HF spectrum.Į-layer skip, regularly at the Spring of every year, and other times also seen on 10 Meters
So I guess some of that magical pixie dust has just sprinkled on down frequency almost one octave! Well 10 Meters, an HF band, often works like a VHF band in terms of its signal propagation. Probably the first wavelength band that I need to address is in reference to my mention of 10 Meters! You see 6 Meters is often referred to as the "Magic Wavelength Band" and this is because it often works like an HF wavelength band, when it is in fact a VHF band.
While this article will primarily address the bands of 10 and 6 Meters, I will add some thoughts on other VHF and UHF wavelengths as we get into the meat of the issue. The Worry and Apprehension of VHF Antenna Polarization These articles will be reprinted to add to the quality of eHam's content and in a show of appreciation to the authors of these articles." " Editor's Note: Due to the popularity of some of eHam's older articles, many of which you may not have read, the team has decided to rerun some of the best articles that we have received since eHam's inception.
0 kommentar(er)
