K2's ATU

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K2's ATU

Steve L.-3
I got my K2 for this year's FD, ended up using my
homebrew 3KW transmatch for the balanced-line
antennas.

Felt kinda dumb, this tiny radio on a battery and a
HUGE transmatch, external VSWR bridge, cables..

So, I rushed to build the ATU for the K2 just in time
for the Flight of the Bumblebees contest. Tacked a
small 1:1 current balun on the output, started hooking
it up to my home antennas for test.

Dang, this thing can really tune! I'm amazed, I gave
it antenna/band combinations I know are hard to tune
from doing it manually with my QRO gear, only had to
switch to 'alt' mode ONCE. It has tuned below 1.3:1
every single antenna/feedline/band combo I've thrown
at it, I'm impressed.

I also really like the SW options of just using it to
measure VSWR on an existing antenna and having two
antenna jacks is very nice to reduce external
switching.

Good job, it's a great compliment to the radio,
especially for field use.

73, Steve N4SL
(this seems to be where everyone lists their radio's
SN, so... K2 #4272


               
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