Withcareful construction and detailed instructions, it is certainly feasible to build no-tune Yagis up to 432 MHz, but I have my doubts about 903 Yagis made out of aluminum rods and tubing. This is especially true if you factor in misinterpretations made when copying someone else's design. Photo 1--Driven element of the Yagi.
Thisvideo is about 10 meters three elements Yagi Antenna from Buddipole parts.Frequency 28.400.000light speed 299.792.458Wave length 10,55607246Metal Loss 5

TheYagi antenna is a narrow-band antenna designed to work only on FM channel. It has the best gain for its sizes and a correspondingly narrow main lobe (beam). Get flat 2 core ribbon cable about 10 meters or more depending (Generally used for TV antenna, in early days) to be used as feeder wire from the transmitter circuit to the antenna.

MattHeere 35.7K subscribers 75K views 6 years ago Challenged myself to build a usable Yagi style antenna for the 2 Meter (2M - 144MHz) amateur radio band. The challenge part is that I Buildingthe 2 Meter Yagi Antenna. Antenna Unboxed. The antenna comes in a small box with many of the parts pre-assembled. Beginning the Assembly. I twisted the elements of one section into position and tightened the wing nuts to hold them in place. Theattached instruction sheet is courtesy of WA5VJB who designed these antennas. It outlines how to build yagis for 144Mhz, 220Mhz, several different 440 band frequencies, 900 Mhz, and 1.2 Ghz. For some of the broader bands (like 2m & 440) you may need to tweak the elemnt lengths slightly, but if you follow the dimensions you'll have very good
Thearticles present designs and construction techniques for inexpensive and easy to build antennas that will make perfect first projects. All articles are in Adobe PDF format. CheapYagi for 70cm - This article is intended to enable non-satellite hams to painlessly acquire the 440 MHz downlink antenna needed to actually hear and work a satellite.
Homebrew2 meter Yagi construction. • 2 1/4 inch x 48 inch Steel rods (I know they'll rust, it's just temporary to get it to work, I'll get aluminum later) I don't have any coaxial cable (don't know the best type to get) and don't know how to match the impedance of the cable to the antenna. BSg9YX.
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    • how to build a 2 meter yagi antenna