Does the K3 support the K2 auxbus?
Yes, the Accessory Connector provides an auxbus signal for standard, external K2 accessories. The list at present includes the KRC2 decoder and the various VHF and UHF transverters. The KAT100 and KPA100 in an EC2 enclosure is NOT supported. The KPA100 was designed as an integral part of the K2, and specifically not as a general purpose HF amplifier. In addition, the KPA100 does not include coverage of 6 meters. The KAT100 requires considerable bi-directional traffic on the auxbus, and could lead to RFI and other issues.