I'm a little unsure about what the ARRL is saying in their
evaluation of the K3's transmit IMD. Here's what I THINK
they are saying:
ARRL's K3/10 measured -23dB worst case. They contacted
Elecraft about this low reading, and Elecraft told them it
should be "significantly better" than that, and Elecraft is
working with ARRL to see why their K3/10 had such a low
reading.
Elecraft also seems to have made a general recommendation
for ALL K3's that until the IMD problem is resolved, the low
power amp should be run at no more than 8 watts on 17 meters
and higher. ARRL then got ahold of a K3/100 and measured IMD
at the output of the low power amp, with that amp running 8
watts, and measured IMD at -27dB.
Am I reading that correctly? So for best IMD, until the
issue is resolved, the K3 needs to be throttled back on 17
meters and above? Is that like 80 watts or so on a K3/100?
Thanks.
Dave Hachadorian, K6LL
Yuma, AZ
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