VarAC - HF discussion forum

Hello, and Thanks in advance. I have a registered version of VARA HF for my Call Sign and have no issues with my registered version of VARA HF using Winlink. Now, I am also a SHARES operator. When I set up the SHARES Callsign in Winlink I get the message that I can not use an unregistered version. How can I obtain the registration key for the NCSxxx SHARES Call sign? I appreciate you..