[Elecraft] K3 - RTTY FSK-D power

[Joe Subich, W4TV]

The K3 power calibration is done at CW (key down) but FSK includes a
bit of shaping to reduce key clicks.  That adds just a bit of peak
to average power difference and would account for a small difference 
between CW and FSK.  I measure just under 1 watt difference at 80 W 
between CW and FSK conditions - about 0.6 dB.

73,

    ... Joe, W4TV


On 7/21/2013 10:31 AM, iw1ayd - Salvatore Irato wrote:
>
> Hi Hank and all.
> It's almost the same as I see it here on the KPA500 PWR diplay. Diddling
> RTTY FSK signal make the K3 Pout bubbling a bit. When at a steady 80W
> Pout without of FSK without diddle I add the diddle the KPA500 move very
> fast around 80W. I couldn't appreciate the real numbers as they move too
> fast and the KPA500 is also fast changing. The same at 40W at at the
> 100W Pout level. The same effect is well seen also on some PS
> instruments. When the K3 is diddling in RTTY the current shows some
> diddling also.
>
> That's almost empirically, but it is.
>
> The same effect was seen on the last FW release and also on the one before.
>
>                      73 de iw1ayd Salvo
>
>
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