K3S Options & Upgrades

Installation manuals for all available K3S option boards and upgrade kits. The K3S uses updated versions of many K3 options (designated with an “A” or “B” suffix).

KSYN3A - Synthesizer

The updated synthesizer board for the K3S. Also available as a K3 upgrade.

KSYN3A Installation Rev A6 (1.9 MB)
KSYN3A FAQ Rev D (436 KB)

KPA3A - 100W Internal Amplifier

Updated 100W amplifier option for the K3S.

KPA3A Option Installation Rev C (2.8 MB)
KPA3A Manual Errata Rev C-1 (268 KB)

KAT3A - Internal Autotuner

Updated wide-range internal automatic antenna tuner.

KAT3A Option Installation Rev A1 (784 KB)

KBPF3A - General Coverage Receive

Updated general coverage receive option.

KBPF3A Option Installation Rev A1 (2.8 MB)

KXV3B - Transverter Interface

Updated rear-panel interface for transverters, IF output, and RX antenna input.

KXV3B Option Installation Rev C3 (1.4 MB)
KXV3B Option Manual Errata Rev C2-2 (116 KB)

KRX3A - Sub Receiver

Updated second independent receiver for diversity or SO2R operation.

KRX3A Subreceiver Installation and Operation (5.2 MB)

KDVR3 - Digital Voice Recorder

Records and plays back audio. Same module used in both K3 and K3S.

KDVR3 Option Installation Rev C (1.7 MB)

K3 EXREF - External Reference

10 MHz external frequency reference input.

K3 EXREF Installation and Operation Rev B (1.5 MB)

KIO3B - Interface Board

Updated I/O board with improved RS232 and audio interface.

KIO3B Installation Rev A3 (2.7 MB)
KIO3B Upgrade FAQ Rev A (628 KB)

KTCXO3-1 - Temperature Compensated Crystal Oscillator

High-stability reference oscillator upgrade.

KTCXO3-1 Installation Instructions Rev F1 (280 KB)

Accessories