[Elecraft] K3 Beta Firmware Rev. 3.41: Improved RX bass response; Flat DATA-mode EQ; "Live" memory recall; etc.

[Brian Alsop]

Are the RF calibration values saved in the configuration file?

Brian/K3KO


Wayne Burdick wrote:
> K3 beta-test firmware revision 3.41 (with DSP rev. 2.37) is now  
> available. See release notes below.
> 
> More refinements are in the works. But alas, it was time to "shoot the  
> engineers" and get some interim feedback on the many new features in  
> this revision.
> 
> --------------
> IMPORTANT NOTE
> --------------
> 
> The latest version of K3 Utility (1.2.9.30) must be used if you plan  
> to do receiver RF gain calibration. You can find K3 Utility on our K3  
> software page, along with the K3 beta-test firmware:
> 
>    http://www.elecraft.com/K3/k3_software.htm
> 
> Please send problem reports to k3support at elecraft.com.
> 
> 73,
> Wayne
> N6KR
> 
> * * *
> 
> MCU 3.41 / DSP 2.37, 10-02-2009
> 
> * 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
> (rolling off below 200 Hz). 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).
> 
> * CWT (TUNING AID) NOW INDEPENDENT FOR CW & DATA.
> 
> * RF GAIN CALIBRATION PROCEDURE UPDATED: You’ll 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 MONITORING: In the TECH MD menu entry,
> tapping 1 (main) or 2 (sub) displays DSP status information. If it is  
> “FFFF”,
> no error has been detected. Tapping CLR resets the data to “FFFF”.
> 
> * 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.
> 
> 
> 
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