Elecraft K3S firmware v5.10

MCU 5.10 / DSP 2.83

• EASIER DIVERSITY RECEIVE SELECTION: A regular hold of SUB now goes directly into diversity receive, without first having to go through "LINK". This should benefit most users of the KRX3 sub receiver, since few use the VFO linking function. Those who do use VFO linking can still turn it on by setting CONFIG: VFO LNK to ON. This menu entry can be assigned to a programmable function​ switch for easy selection if desired, eliminating the need to bring up the menu. Note: Remote-control command "LN" is another way to accomplish VFO linking.
• DIVERSITY-MODE FIX: Diversity mode with mis-matched crystal filters was in some cases resulting in the main and sub receivers being offset.
• PREAMP ICON FIX: In some cases the "PRE" icon was left in the incorrect state.
• REMOVED CONFIG: DUAL PB MENU ENTRY: This menu e​ntry isn't needed since the K3's original, idiosyncratic "DUAL PB" function for CW mode ("context/focus" filtering) is no longer supported. APF (audio peaking filter) was added later; it is far more effective and of greater utility. In conjunction with this, the DUAL PB front-panel switch now always selects APF in CW mode. (In AFSK-D and FSK-D modes, DUAL PB still turns the dual-peak audio filter on/off.)