Light, a mirror and magnifying glass; driven element, reflector and director element(s). Genius. Magnificent explanation from one of, if not the best communicator in amateur radio. Congratulations Jim - you’ve done it again!
Again, a very nice visual demonstration of how one of these antennas work. Well done! Love the lightbulb/magnifying glass illustration. Very well done.
Two phased 20m antennas, that sounds amazing. Thank you for presenting this information. You made it easy to visualize that which is normally printed in a book.
Nice explanation, did not know much about the Yagi. Living in a condo looks like i'll have to stick with my G5RV and End Fed. Great informative video! Thanks Jim!
Funny this big lego mockup. Or are sometimes really these big tubes used for the actual antenna? Maybe for another video, whats the use of two yaggis? I just guess, double power, maybe more directionality for a twin setup?? by having phase control it also works out somewhat when they are rotated??
I always enjoy your videos, great information for helping out all other operators! That's why I do it and that's what this hobby is all about.. Ke0mje 73
Hi Jim, Nice concise video. Great job. I have the T2X rotator and seven element triband yagi that uses full length dipoles as the radiators on a 24 ft. boom. 73 WB3BJU
A helical element is not going to be as efficient. How much less, I don't know. I bought two long coils and will try something soon. My seat of the pants guess is that if the helical element is, let's say, 50% shorter that the efficiency is much better than 50%....maybe 75% depending on construction, Q, placement, etc. 73, Jim
Thanks Jim for a simple, easy to remember the workings of a yagi. Also, thanks for the Hexbeam comparison. I have the K4KIO and I do see a marked difference from the Cushcraft Tribander I use to have. Love my Hex! Now, only if you could give a simple explanation as to what makes a Triband yagi, a 3 band antenna, if we stay with the fact that the driven dipole element is cut a specific frequency. 73 Bob ka9bhd
Perhaps it is like two magnifying glasses. You can focus them to a really narrow point by positioning. Keep in mind, a boom can be too long and the gain & f/bsuffers. 73, JIm
Interesting video Jim and thanks for the breakdown of the simple simplicity of the famed Yagi. May its use in amateur radio continue to be demystified. I'm very curious, could you please explain, how you go about using 2 separate in concert with each other. Please go into detail about the wiring. Does each Yagi have its own individual run back to your radio room? Thanks Jim for what you do, de KE0RfZ
