The KAT3A is completely controlled by the K3S. Unlike most other internal automatic tuners, the KAT3A is capable of finding impedance matches for up to a 10:1 SWR.The KAT3A provides a wide-range, switchable C-in/C-out L-network for matching a variety of antennas with SWR as high as 10:1 (100 W) or 20:1 (10 W). There are 8 inductors and 8 capacitors in the L-network, each switched with a DPDT relay for high reliability. The KAT3A also includes a second antenna jack and associated switching relay. There’s an additio nal jack on the board for routing the unused (non-transmit) antenna to the KRX3A sub receiver module.
A: No. You can continue to use your external tuner with the K3S. The KAT3A, however, will provide more integration and automatic selection of the 2 antenna ports.
A: You will need only basic hand tools (Philips head screwdriver, pliers) to install the KAT3A. Like all of our K3S options, it will come with an installation manual that covers disassembly, installation and reassembly in a step-by-step procedure that anyone can follow. There plenty of support from Elecraft along the way, too.