This is the original version of Larsen's yagi antenna for the analog cellular band. I don't remember the full specs (and don't want to quote the ones for their new improved version), but basically it's a great way to reach a distant MTSO... or otherwise get a decent beam up for the 900 MHz band. The connector is a female TNC, overall length is 32 inches, and it easily separates into two pieces for portable use.
I got this back in 1988, and used it to extend the range of my 3-watt Oki 491 cellular phone aboard the Winnebiko II. (That was such an oddity that it even made the Cellular Business trade journal.) One day in Anacortes, I made a local call in Seattle, then another in Vancouver, just by rotating this beam atop the bike's antenna mast.
Anyway, I haven't used it in years, and it's not really suited for salt-water duty (aluminum with black paint, scuffed bare in places)... so it is looking for a new home.
This product was added to our catalog on Wednesday 18 February, 2009.