Tape measure style Yagi using PVC and Ladder line.


Mike Hoblinski
 

I ran across this hams Version of the Tape measure Yagi antenna using PVC 
pipe as the skeleton and Ladder line  for the elements. Its probably a bit heavier
than the tape measure Yagi but wont flop around when twisted. His version is
constructed for a pole mount but could be reworked as a hand held or tri-pod
mount. He uses a PVC C style clamp that the antenna the ability to rotate the
boom between horizontal and vertical.

Plans  https://kb9rlw.blogspot.com/2020/12/a-durable-2-meter-3-element-yagi.html
Video  https://www.youtube.com/watch?v=hh9beU335s4

Mike
N6IMF


Siegfried Jackstien
 

i would not use a haipin match but a halfwave transformer

impedance of a folded dipole with parasitic elements is in the 200 ohms
area .. so a halfwave transformer is the right choice

the text in the homepage where you found the design has a fault ... a
folded dipole does not have 450 ohm ... also not when using the 450 ohms
window line (that in real is more 390 ohms or so) ...

hairpin match does not provide balancing and is lossy compared to the
halfwave line

greetz sigi dg9bfc