Elecraft KSYN3A K3 K3S UPDATED Synthesizer Option board.

If you want to upgrade your K3 to close to a K3S,you may want this.

Or,if you are adding a sub receiver  to your K3S,you will also need one of these.

I have a matching K3 in another listing.

These have been discontinued at Elecraft.

Comes with manual.

It is also listed on QRZ. no tax there :)

Please see pictures for more details.

Local pickup is also fine.

I can be reached through QRZ if you have questions about this unit.

Larry K6RO