[TenTec] IMD Measurements - Yaesu/Inrad vs Orion

[Ken Brown]

>>I can hear no clicks at all into my sidetone when using my G4ZPY straight
>>key !
>>    
>>
>
>Listen on another RX, not sidetone.
>  
>
Yes. In many (perhaps most) rigs the side tone has very little relation 
to the actual transmitted CW signal. It is only an audio oscillator (or 
tone generation routine in a microprocessor) that gets keyed nearly 
simultaneously with the real TX output. In many cases it will follow 
high speed keying input very accurately even when the real RF output 
dits and dahs are chopped short.

DE N6KB