I constructed a new Eggbeater antenna using an article written by Jerry, K5OE about 19 years ago. Here is the URL for your reference.
I am testing it in parallel with a commercially built Eggbeater manufactured by M2 Antenna Systems.
All it took was 15 feet of #8 copper wire, 8 feet of 1/4" aluminum rod, a 10 foot section of 1" PVC pipe and a few common bits of hardware. I believe the material costs (excluding the coax cable) were less than $20. The only hard to find component is a short (< 2 feet) piece of RG-62 coax used to create the phasing line between the two antenna loops. This is a 93 ohm impedance coax and isn’t commonly available. As it happens I have a bunch of it I picked up 30 years ago that I have been salvaging the braded copper shield from for grounding straps.
Construction was easy and took about half a day. Drilling nice square and correctly aligned holes through a round plastic pipe can be a pain so I designed and printed a simple plastic drilling guide to make this easy. If there is any interest, I can probably write up a construction article and provide the STL file for my drill guide.
I cut the antenna elements for 137.1 MHz and so far the test performance has been very good.