The infamous "firecracker" antenna. Needs a really good ground plane (ie the top of a locomotive). Pretty heavy duty; not sure I'd put it on top of a hi-rail vehicle (or a building mast, for that matter).Does it look anything like this:
So what your saying is: It is an awesome super expensive plastic case for a coil of cheap wire. Sounds like a lot of products in use.Also the firecracker isn’t what people think it is. It’s pretty much just a housing for a very flimsy element inside - not as awesome or super as people think they are/were - and why the Sinclair gained popularity.
if you crack one open you’ll see it’s just some wire. One of the reasons why Motorola incorporated a SWR sensor into their radios (will display “bad antenna” on the display in a high SWR/short condition).