Cheap yagis without needing to drill booms

It is rather difficult to drill holes exactly in round booms for yagi elements. I have built some more WA5VJB yagis using plastic tube booms and simple ways to attach the elements to the boom. The elements are then very easy to adjust for exact positioning. The photo below shows a 144 MHz 4 element WA5VJB yagi with a plastic tube boom.

Here are many photos showing how this is done. The text is in Swedish, but I think you still can understand the construction.

My earlier blog posts about other WA5VJB yagis I have built:
Cheap 144 and 432 MHz yagis for portable use
Field testing the cheap 144 yagi
Field testing the cheap 432 yagi