On 3/9/2021 10:56 AM, Preston Smith wrote: > RTTY, > Pactor, Amtor etc) the operator or machine must actually copy > the call sign of the station being worked. Are you telling us that you can copy RTTY, Pactor, Amtor with your own ear/brain? WOW! I do a lot of RTTY in contests and I've never developed that skill. 73, Jim K9YC