In article ,
Tester wrote:

In xomd cases when TV and radio stations have split ownership, and
there sas a three letter call, one of the stations added an additional
W or K. (WWOR near NYC, KKOB in Albuquerque/

As I remember the reasons, the three letter calls are reserved for
maritime shore stations. So the only Medium Wave broadcasters that keep
them are "grandfathered" stations that don't change their call letters.

Mark Zenier
Googleproofaddress(account:mzenier provider:eskimo domain:com)