I built the K2 with internal battery and all accessories for a compact
stand alone QRP rig and the KPA100/ KAT100 in a separate EC2 enclosure
for QRO base operation.
Enjoyed assembling the kits, lots of toroid winding and soldering.
I find that I use the K2 QRP the most when spending time outdoors. CW and
SSB
Have other rigs for the base operation including a Icom 701, Icom 706,
mil spec Sunair GSB-900 with auto antenna tuner (good for SSB) so have
not used the KPA100/KAT100 that often
Am not into contesting so do not see a need for an upgrade at this time.
With all of the recent talk about the importance of Roofing filters, a
very good crystal filter right after the mixer is inherent in the K2
design.
73,
Bob Johansen WB2SRF
K2 S/N 5622
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