On Sun, 5 Oct 2014 09:40:05 EDT, Jeff Liebermann
wrote:

Also, extra class licensees can get call signs in the form of 1x2
(N6AA), 2x1 (NA6A) and 2x2 (AA6AA). Advanced class can get only 2x2.
When I upgraded from Tech to Extra, I took advantage of this to trade
in my old call sign for an improved version.

As did I in 1978. 20 years later I paid the "tribute" (i.e. "vanity
fee") to get my original 1x3 call sign back before someone else got
it.

73 de K2ASP - Phil Kane

From a Clearing in the Silicon Forest
Beaverton (Washington County) Oregon