[Elecraft] K3: New/ Old QSK

[Paul Christensen]

> Go to CONFIG and select CW WEIGHT. Then press the "3" key on the numeric 
> keypad to toggle it.
> It doesn't seem to make much of a difference for me.
> 73,
> Vic, K2VCO

Using the most current K3 F/W, I compared the New versus Old QSK 
configuration using a dual-trace scope and an external keyer modified with a 
buffered output for scope triggering.

Under the "Old" QSK setting, the CW envelope rises ~ 15 ms after contact 
closure versus ~ 19 ms for "New."  Under "Old," the keyed RF envelope more 
closely matches the external contact closure duration.

Listening in the headphones, I detect little difference in weighting and T/R 
recovery time.  I haven't had time to compare the two modes under varying 
AGC and band conditions, but unless I detect some anomaly, I am leaving my 
K3 set for "Old. QSK."

Paul, W9AC