Posted by KK7P on URL: http://elecraft.85.s1.nabble.com/K3-Mic-up-down-buttons-tp2891198p2905358.html
>>I must be missing something here. For the life of my I can't figure why
>> you would want to be changing frequency while transmitting CW (or any
>> other mode)
It is a requirement for using most Amateur satellites as you correct for
Doppler shift on the uplink.