[Elecraft] KX3-2M, high speed CW sounds strange

[paul hippenmeyer]

KX3-2M: high speed CW (e.g. 35 wpm) with external keying sounds strange 
in sidetone on 2m. I have no RX to monitor RF. With the internal keyer 
it works perfect.
On HF bands CW sounds perfect!

MCU 2.19
DSP 1.30

73, paul
hb9axl