Julian, G4ILO wrote:
>
> Actually, as I said, it's quite acceptable at 100W peak, which I have run
> on several occasions inadvertently due to setting the power control to 40W
> and believing that's what I was getting.
>
I must apologize and correct the above statement since I was thinking about
what happens when you use the QRP version of the K3. Although the QRP K3
radiates a signal that falls within the range KK7UQ defines as "good" ( <
-23dB) at full power (10W), the IMD is unacceptable if the K3/100 is driven
at full power (100W.) Apologies for the misinformation.
For what it's worth, this is the table of power output vs IMD measured by me
on 10MHz (NB: Powers quoted are peak power. Average power during a modulated
"idle" signal is about one third of this.)
2W -30dB
4W -30dB
6W -29dB
8W -27dB
10W -24dB
12W -22dB
above this point the PA kicks in:
20W -28dB
40W -26dB
above 40W the IMD cannot be regarded as "good":
50W -23dB
60W -22dB
80W -21dB
100W -18dB
-----
Julian, G4ILO. K2 #392 K3 #222.
http://www.g4ilo.com/ G4ILO's Shack http://www.ham-directory.com/ Ham
Directory http://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3
--
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