[Elecraft] Power output question

[Tom Hammond]

Hi David:

>I've noticed something with my K2/100 and wonder whether this is normal
>behaviour or not ??
>
>When I switch to a new band and send CW using full power, I don't seem to 
>get full output power on the first couple of dits (or dahs), according to 
>the bargraph power meter. After the first couple of dits the meter reads 
>full scale, and continues to do so whilst I remain on that band.
>
>I also get the same thing when the turn the power back to 10 watts.. I 
>only get the first 1 or 2 LEDS lit with the first couple of dits, but then 
>full scale on the rest.

This is normal operation. The K2 incorporates a digital (rather than 
analog) ALC circuit. As such, it must sample the output power level in 
order to be able to determine how much drive to apply. This takes 
several  output cycles to accomplish and that's why you must apply a bit of 
RF in order for the ALC to find itself and do what it needs to adjust for 
proper output level.

Cheers,

Tom Hammond    N0SS