Two lengths pop out with low SWR for all bands: 38m and 16.2m. Wire Length 1.8 MHz 3.7 MHz 5.3 MHz 7.1 MHz 10.1 MHz 14.2 MHz 18.1 MHz 21.2 MHz 24.9 MHz 28.5 MHz 50.1 MHz 53.3m 1.2 1.6 1.1 1.1 1.1 1.8 1.3 1.6 1.7 1.2 1.5 51.5m 1.4 1.2 1.2 1.2 1.2 2.1 1.4 1.4 1.5 1.2 1.1 49.4m 1.4 1.5 1.7 1.3 1.6 1.8 1.9 1.1 1.

I’m borrowing this interesting device from a friend hoping to find what ever information about it I can. The website is long gone and the little french material I could find at archive.org was didn’t seem to mention this device.

It has an SO239 at the bottom and a single screw terminal at the top.