strange tone using FT8 on 80M


todd ruby
 

Hi all,
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

todd 
WB2ZAB
SN#339

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