Elecraft K3S firmware v3.41

MCU 3.41 / DSP 2.37

• IMPROVED RX LOW-FREQUENCY RESPONSE in AM/SSB/CW MODES:

Most noticeable with hi-fidelity headphones or large speakers. NORMalizing the DSP passband still sets the​ cutoff to about 100 Hz, but DSP controls can be adjusted to provide a lower response. RX EQ can enhance bass further.

• NO RX EQ OR TX EQ IN DATA MODES: That is, the response is flat.

The RX EQ and TX EQ menu entries now affect only the other modes.

• "LIVE" MEMORY RECALL (M>V): If you tap M>V, then start rotating VFO A to select a memory, the K3 will now switch to the band/mode of each memory. Exit memory recall by tapping M>V a second time.
• VFO COARSE STEP ROUNDING: Tap '1' in the VFO CRS menu entry to select RND=NO or YES. If YES, the VFO frequency will be rounded off during COARSE tuning. This menu entry also sets the per-mode COARSE step size. Note: The RIT/XIT control moves the VFO in coarse steps if RIT and XIT are not in use (use CONFIG: VFO OFS to turn this on/off).
• SSB COARSE STEP SIZE OPTIONS NOW 0.1, 0.5, 1.0, and 2.5 kHz:

Replaced 5.0 kHz with 0.5 kHz.

• CWT (TUNING AID) NOW INDEPENDENT FOR CW & DATA.
• RF GAIN CALIBRATION PROCEDURE UPDATED: Youll need the latest revision of K3 Utility and a 50-microvolt signal source (e.g., an XG2).
• SUB RX NOISE BLANKER NOW FULLY INDEPENDENT OF MAIN:

This includes the on/off state and NB LEVEL settings. Note: Set CONFIG: NB SAVE to YES to preserve your per-band NB on/off settings.

• DSP INTERNAL STATUS MONITOR​ING: In the TECH MD menu entry, tapping 1 (main) or 2 (sub) displays DSP status information. If it is ÒFFFFÓ, no error has been detected. Tapping CLR resets the data to ÒFFFFÓ.
• CHANNEL HOPPING IN FM MODE LOADS REPEATER SETTINGS:

Repeater offsets and PL tones are now loaded during scanning/hopping.

• PL TONE DEVIATION ADJUSTABLE: Tapping '1' in CONFIG: FM DEV allows setting PL tone deviation (300-600 Hz in 30-Hz steps; default, 360 Hz).
• EU REPEATER 1750 HZ PL TONE BURST: If a 1750 Hz PL TONE is selected, a 500 ms tone burst will be sent on each PTT activation.
• EXTENDED 6-METER TUNING RANGE: The VFO can now be tuned down to 44 MHz to monitor signals that may be correlated with 6-meter band openings. Loss increases rapidly below 49 MHz (-34 dB at 45 MHz), so a preamp (e.g., the Elecraft PR6) may be needed to obtain a useful NF.