Speaking of back porting to the KX3, what about the K3? Any hope that this might end up on the K3 also?
K4TO On Mon, May 11, 2026 at 3:37 PM Wayne Burdick via Elecraft < [email protected]> wrote: > The latest beta release for the K4 and K4/0 software includes the > long-awaited Spectral Subtraction Noise Reduction feature (SSNR). Our Field > Testers have found our SSNR algorithm to work very well in all modes, > especially SSB and CW, with many commenting it's the best NR they've used. > > We've also implemented a new STARTUP macro capability. This allow users to > customize the K4's power-up behavior. For example, you can have SPLIT > always default to OFF if desired. > > This beta release is recommended for all K4 users. Please test using all > bands, modes, and features you normally use, while also giving SSNR a good > workout. For full details see release notes below. > > IMPORTANT: If you have both a K4 (or K4D) and K4/0, you'll need to install > new software on both. This is necessary to coordinate access to new > features between the two units. > > 73, > Wayne > N6KR > > > =========================================================== > ====================== K4 R38.BETA3 ====================== > ====================== K4/0 R3.BETA1 ====================== > =========================================================== > > May 11, 2026 > > ------------ > NEW FEATURES > ------------ > > - ADDED SPECTRAL SUBTRACTION NOISE REDUCTION (SSNR): SSNR is a major > enhancement to the K4's receivers, often suppressing background noise to > nearly inaudible levels. In addition to making reception more pleasant, > SSNR can often clarify signals near the noise floor that were highly > degraded. SSNR works in all modes but is especially effect on speech > signals. > > TO USE SSNR: Hold the NR LEVEL switch, change the algorithm from "LMS" > (least mean squares, the original NR algorithm) to "SSNR", and select a > level from 1-20. Higher level values will suppress noise to a greater > degree, at the expense of some erosion of weak signals. As with all NR > algorithms, the lowest effective value should be used. > > NOTE: In CW mode where weak or tightly packed signals are present, LMS NR > may be preferred. Also, CW copy may be better enhanced by narrowing filter > bandwidths or using APF rather than using NR. Filtering and APF can also be > combined with NR and NB for maximum benefit. > > - RIT/XIT OFFSET KNOB SPEED REDUCED: The RIT/XIT offset knob's steps per > turn rate is now set to 50 when VFO A is set for 100, and 100 if VFO A is > set for 200 or 400. This makes fine-tuning of signals easier. > > - CLIENT FREQUENCY MEMORIES: The K4/0 (and K4 when used as a remote client) > store their own set of GP and Quick memories internally. Those memories now > apply to every server K4 to which the client connects. Any changes remain > local to the client. Client activity never changes memories stored on the > server. If two clients connect concurrently to the same server, they will > each have their own set of GP and Quick memories. NOTE: When you first > install this update, your *most recent* per-Server Quick Memories will be > saved. Any memories that you save from now on will apply to ALL servers. As > a one-time side effect, GP memories may be replaced by factory defaults, > mostly blank except for 60 m presets. > > - NOW PRESERVING STATES OF SPLIT, TEST, VFO LINK, AND VFO LOCK: The new > STARTUP macro (see below) allows full customization of the K4's power-up > state, so we no longer automatically turn these settings off. > > - STARTUP MACRO: You can now automatically set up initial conditions each > time the K4 is turned on, if desired, by editing the STARTUP MACRO. Tap Fn, > then select MACROS. Scroll to STARTUP (at the top of the list). To bring up > a text keyboard, tap the empty field at the right end of this selected line > on the screen. You can bypass execution of the startup macro by holding the > REV switch during power-on. > > For example, if you want SPLIT to be turned OFF on power-up, enter the > command "ft0;" as the macro command. (A semicolon is required at the end of > each command in the list.) Another typical use of the startup macro is to > jump to a preferred frequency and/or mode. The command "fa14250;md2;" in > the STARTUP macro would set the K4 to 14.250.000, USB mode. Refer to the K4 > Programmer's Reference for full details on available control commands. > > --------- > BUG FIXES > --------- > > - ANT and RX ANT button configuration tracks server ANT CFG correctly upon > connection. Changes made to ANT CFG while connected do not modify the ANT > CFG of the Server, only the Client, and only temporarily for the duration > of the connection. (Host commands RS2, ACM and ACT may be used to change > Server ANT CFG while remote, if required.) > > - DVR message play can now be interrupted via PTT or VOX activation. RF > switching artifacts eliminated from DVR message play. > > - Eliminated ALC/CMP metering glitch at start of remote transmission. Also > eliminated false triggering of VOX. > > - TX Inhibit status on client now passed correctly. > > - RX EQ adjustments on client now adjusting server properly. > > - REV button now functions correctly when activated from a K4/0. > > - RX command now clears client streaming DVR message. > > - Internal storage for frequency memories now based on Client (K4/0) serial > number. > > -------------- > FOR DEVELOPERS > -------------- > > - DARS (start voice recording of speaker audio) is now allowed in the > STARTUP macro. > > - Updated RS (Remote Set) command: > > * Added '2' as a new parameter for experimental mode command tunnel. > RS2; enables a remote set command tunnel which, when enabled, > causes commands to be forwarded to the server radio. > For example, RS2;MG0;RS0; will set MIC GAIN on the server radio to 0 > without affecting the client radio. > > - Added NRS command for SSNR configuration. Associated change to NR command > (for LMS). > > - RX; command interrupts DVR messages sent to server. > > - RX; command interrupts KZ commands in progress on server. > > - TXPARAMS in status area no longer flickers between 0 and current value. > > -- > Elecraft, Inc. > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
