Vertical 433 Mhz Antenna
thingiverse
UHF antenna design. Initial Antenna Length = Frequency * 0.95. 1/4 length counterweight. Material: aluminum pipe fi 8 mm. M6 stainless steel adjusting screw. Check the antenna with a vector analyzer such as NanoVNA. For me, it had to be shortened. Items such as socket head screws, adjusting screw affect the SWR. For me, the antenna has been tuned SWR 1.0 at 433.500 MHz. VY73 de SP9MX
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