I have been playing around with FT8 on my K3, and it has been working fine on all the bands where I have transmitted, 17,20 and 40M. However, on 80M, instead of the pure tone as on the other bands I am getting the tone but also a hum/buzz unless I dial the power down to 20W. On all the other bands I hear the pure transmit tone regardless of the power setting from 50-700W with no problems.
Any ideas what is up with 80?
tnx es 73