[Elecraft] K3: Upgrade of KAT3 possible?

[Carey Magee]

Hi. I have a couple of antennas I use that require no antenna tuner. I have
the KAT3 bypassed for those.

Is there an upgrade kit for the kat3, or do I need to buy the kat3a if I
want to take advantage of completely bypassing the tuner.

Many thanks.

73,
Carey