K4 Control for Elecraft K41.151 - App Store

K4 Control for Elecraft K4 is an innovative Software Defined Radio (SDR) client designed specifically for iPad users, allowing comprehensive control and operation of the Elecraft K4 transceiver. Developed to maximize the capabilities of the K4, this app is your gateway to operating your transceiver seamlessly, both locally and remotely via the internet.

KEY FEATURES

■ Full Control Anywhere: Operate your K4 transceiver locally at home or from anywhere in the world with an internet connection.

■ Integrated Digital Modes: Use built-in tools for FT8, FT4, CW, Weather FAX and SSTV (NEW!) without the need for external software.

■ Logging: Maintain a comprehensive logbook with automatic logging, ADIF import/export.

■ Dual VFO and Waterfalls: Manage dual VFO settings and view real-time dual waterfall displays for detailed frequency insights (dependent on transceiver capabilities).

■ DX-Cluster and Alerts: Stay updated with DX-Cluster integration and personalized alerts for desired callsigns, DXCCs, States or others.

■ Visual and Interactive Features: View radio spots in the waterfall display, check band limits, and see callsigns on a map complete with directional data.

■ CW Operation: Offers unique CW capabilities including remote CW transmission via keyboard or a hardware paddle connected via CTR2/MIDI Controller.

WHAT YOU NEED:

- An Elecraft K4 Transceiver
- The Transceiver needs to be connected to your local Network
- No USB cable needed or supported
- An iPad which runs at least iOS 18

LEARN MORE:

Discover all features here: https://ham-radio-apps.com

Access the full Manual: https://ham-radio-apps.com/manuals

Note: K4-Control for Elecraft is independently developed and is not affiliated with or endorsed by Elecraft.

Version History This update contains the following changes and improvements:

◉ Added a Terminal mode for APRS. You can now connect to BBSes or start a keyboard-to-keyboard session with another ham radio operator.

◉ APRS can now auto-repeat position and status reports.

◉ The APRS RX button now indicates a transmission, providing clearer feedback.

◉ Additional APRS improvements and refinements.

◉ For the RIT/XIT view there is now a setting for defining minimum and maximum RIT/XIT values, improving support for satellite operation.

◉ Command Bar improvements.

◉ PTT Double-Tap has been removed for a better PTT button experience.

◉ The “Available Radios” screen now remembers the last connection so you can just hit the Connect button in case you like to connect with the same Radio

◉ Additional changes in preparation for an upcoming iOS release.Implemented several additional improvements and optimizations behind the scenes
Kindly use the ‘CONTACT SUPPORT’ feature under Settings of the app in case of questions or issues. I will ensure your request is promptly answered or resolved.

Your continued support and valuable feedback play a crucial role in further improving this app.

73s,

Marcus, DL8MRE 1.151 Sep 3 This update contains the following changes and improvements:

◉ Added support for the HaliKey MIDI Keyer USB Controller

◉ Added an additional Azimuth Offset Setting the for Metropwr RT1 Rotator Controller

◉ A warning will now be displayed when the Low Data Mode is enabled

◉ An issue in the POTA Tool when showing a map was fixed

◉ Added Frequencies for 2200m, 630m and 23cm to the WSPR Tool

◉ Improved logbook iCloud handling in case of poor internet access

◉ Logbook export will now also export even wrong or incomplete QSOs

◉ Implemented some additional improvements and optimizations behind the scenes
Kindly use the ‘CONTACT SUPPORT’ feature under Settings of the app in case of questions or issues. I will ensure your request is promptly answered or resolved.

Your continued support and valuable feedback play a crucial role in further improving this app.

73s,

Marcus, DL8MRE 1.132 Jul 9 This update contains the following changes and improvements:

◉ Added support for SSNR (Spectral Subtraction Noise Reduction) as option to the NR button

◉ The Release History feature has been fixed

◉ Implemented some additional improvements and optimizations behind the scenes
Kindly use the ‘CONTACT SUPPORT’ feature under Settings of the app in case of questions or issues. I will ensure your request is promptly answered or resolved.

Your continued support and valuable feedback play a crucial role in further improving this app.

73s,

Marcus, DL8MRE 1.131 Jun 18 This update contains the following changes and improvements:

◉ Implemented some logbook and FT8 improvements

◉ Implemented some additional improvements and optimizations behind the scenes
Kindly use the ‘CONTACT SUPPORT’ feature under Settings of the app in case of questions or issues. I will ensure your request is promptly answered or resolved.

Your continued support and valuable feedback play a crucial role in further improving this app.

73s,

Marcus, DL8MRE 1.130 Jun 13 This update contains the following changes and improvements:

◉ An issue was fixed, when moving panels like the Command Bar or PTT too close to the top of the screen

◉ For the Tune Stack, clicking Clear will now regard Favorite entries. Double clicking/tapping clear will clear all entries

◉ An issue with the Metropwr, Waveshare and Green Heron tools was fixed

◉ Implemented some additional improvements and optimizations behind the scenes
Kindly use the ‘CONTACT SUPPORT’ feature under Settings of the app in case of questions or issues. I will ensure your request is promptly answered or resolved.

Your continued support and valuable feedback play a crucial role in further improving this app.

73s,

Marcus, DL8MRE 1.126 May 8 This update contains the following changes and improvements:

◉ Some WSPR decoding fixes and improvements

◉ Some CW improvements

◉ Implemented some additional improvements and optimizations behind the scenes
Kindly use the ‘CONTACT SUPPORT’ feature under Settings of the app in case of questions or issues. I will ensure your request is promptly answered or resolved.

Your continued support and valuable feedback play a crucial role in further improving this app.

73s,

Marcus, DL8MRE 1.124 Apr 25 This update contains the following changes and improvements:

◉ Some FT8 improvements

◉ Some WSPR improvements

◉ Implemented some additional improvements and optimizations behind the scenes
Kindly use the ‘CONTACT SUPPORT’ feature under Settings of the app in case of questions or issues. I will ensure your request is promptly answered or resolved.

Your continued support and valuable feedback play a crucial role in further improving this app.

73s,

Marcus, DL8MRE 1.120 Apr 17 This update contains the following changes and improvements:

◉ A new Tool to maintain, import and export Memories has been added

◉ A new VoiceMacros Tool was added. Voice Macros can be send from the Macros Bar

◉ A new CW Panel was introduced allowing CW from the Waterfall screen and not only from the CW Decoder Tool

◉ The Command Bar is now also available on iPhones

◉ The FT8 tool can now handle compound messages used in Contests or by DX-Peditions

◉ Fixed some issues in the DX-Cluster Tool

◉ @IOS Multiple CAT Commands entered for the Command Bar can now be separated by a | character which will also add a small delay between commands

◉ A new Setting TX Off Delay was introduced

◉ Some accessibility improvements

◉ A new WSPR Tool was added (iOS 26 required)

◉ A new Tool Waveshare has beed added — Waveshare devices can now send remote CAT commands to tuners, amplifiers, or antenna controllers such as UltraBeam or StepIR. A relay device can also be used to remotely switch or power devices, including your radio

◉ A new Tool Metropwr has been added for Power Meter and Rotator Control (see the App manual for details)

◉ Added support for the Green Heron RT-21 Rotator controller

◉ A new APRS Mode Tool has been added which supports 300 and 1200 Baud

◉ Implemented some additional improvements and optimizations behind the scenes
Kindly use the ‘CONTACT SUPPORT’ feature under Settings of the app in case of questions or issues. I will ensure your request is promptly answered or resolved.

Your continued support and valuable feedback play a crucial role in further improving this app.

73s,

Marcus, DL8MRE 1.118 Apr 11 This update contains the following changes and improvements:

◉ The app is now compatible with iPhone

◉ An issue with the iOS Keyboard for frequency input was fixed

◉ Added the possibility to temporary TX with a given power level by right clicking / long pressing the Tune button e.g. when using external Tuners or PAs

◉ Fixed an issue when canceling submissions of CW Macros

◉ Added the possibility to select memories via MIDI / Keyboard shortcut command

◉ Sending CW Macros will no longer focus to the CW Decoder entry field

◉ Added support for changing the unselected VFO (VFO B) frequency via MIDI

◉ Added a Lock button to prevent accidental VFO or settings changes

◉ Implemented some additional improvements and optimizations behind the scenes
Note: The App Manual is currently being updated reflecting the differences between the iPad and iPhone version
Kindly use the ‘CONTACT SUPPORT’ feature under Settings of the app in case of questions or issues. I will ensure your request is promptly answered or resolved.

Your continued support and valuable feedback play a crucial role in further improving this app.

73s,

Marcus, DL8MRE 1.99.3 Jan 22 This update contains the following changes and improvements:

◉ @IOS The app is now compatible with iPhone

◉ @MAC Added support for the Green Heron RT-21 Rotator controller

◉ @IOS Fixed an issue showing a wrong keyboard when entering a Frequency

◉ Added the possibility to temporary TX with a given power level by right clicking / long pressing the Tune button e.g. when using external Tuners or PAs

◉ @MAC Further improved Rotator support for the MetroPWR RT1

◉ @MAC When looking up calls, rotators can be moved to the location of the call (Long or Short Path)

◉ @MAC On maps, rotators can be moved to spots on the map

◉ Fixed an issue when canceling submissions of CW Macros

◉ Added the possibility to select memories via MIDI / Keyboard shortcut command

◉ Sending CW Macros will no longer focus to the CW Decoder entry field

◉ Added support for changing the unselected VFO (VFO B) frequency via MIDI

◉ Added a Lock button to prevent accidental VFO or settings changes

◉ Implemented some additional improvements and optimizations behind the scenes
Kindly use the ‘CONTACT SUPPORT’ feature under Settings of the app in case of questions or issues. I will ensure your request is promptly answered or resolved.

Your continued support and valuable feedback play a crucial role in further improving this app.

73s,

Marcus, DL8MRE 1.99.1 Jan 16 This update contains the following changes and improvements:

◉ The app is now compatible with iPhone

◉ Fixed an issue showing a wrong keyboard when entering a Frequency

◉ Added the possibility to temporary TX with a given power level by right clicking / long pressing the Tune button e.g. when using external Tuners or PAs

◉ Fixed an issue when canceling submissions of CW Macros

◉ Added the possibility to select memories via MIDI / Keyboard shortcut command

◉ Sending CW Macros will no longer focus to the CW Decoder entry field

◉ Added support for changing the unselected VFO (VFO B) frequency via MIDI

◉ Added a Lock button to prevent accidental VFO or settings changes

◉ Implemented some additional improvements and optimizations behind the scenes
Kindly use the ‘CONTACT SUPPORT’ feature under Settings of the app in case of questions or issues. I will ensure your request is promptly answered or resolved.

Your continued support and valuable feedback play a crucial role in further improving this app.

73s,

Marcus, DL8MRE 1.99 Jan 15 This update contains the following changes and improvements:

◉ A few issues caused by iOS 26 were addressed

◉ For SSTV it is now possible to add a Watermark Text to the Image

◉ A new RIT / XIT panel with wheel has been introduced and some RIT / XIT issues have been fixed

◉ A new Tune Stack Panel has been introduced which records the last frequency changes per VFO. To open the Tune Stack use the View menu

◉ Fixed an issue of the CW Tool when using a different Keyboard Type

◉ Some Logbook improvements

◉ Implemented some additional improvements and optimizations behind the scenes
Kindly use the ‘CONTACT SUPPORT’ feature under Settings of the app in case of questions or issues. I will ensure your request is promptly answered or resolved.

Your continued support and valuable feedback play a crucial role in further improving this app.

73s,

Marcus, DL8MRE 1.86 10/05/2025 This update contains the following changes and improvements:

◉ The Scope Averaging setting is now regarded

◉ This update concentrates mainly on SSTV

◉ Added support for SSTV transmission. You can now transmit and receive picture over the air

◉ Automatic slant correction is faster and more accurate

◉ Manual image adjustment tools offer finer control

◉ Added FSK ID transmit and receive support

◉ Integrated QSO logging

◉ Progress bar shows real-time TX and RX status

◉ Implemented some additional improvements and optimizations behind the scenes
Kindly use the ‘CONTACT SUPPORT’ feature under Settings of the app in case of questions or issues. I will ensure your request is promptly answered or resolved.

Your continued support and valuable feedback play a crucial role in further improving this app.

73s,

Marcus, DL8MRE 1.78 08/08/2025 This update contains the following changes and improvements:

◉ This update adds an SSTV tool for receiving and displaying images from Slow-Scan TV (SSTV) signals. The ability to transmit SSTV is planned for a future update.

◉ Fixed some issues when using the Center mode

◉ Fixed an issue when switching to VFO-B

◉ Implemented some additional improvements and optimizations behind the scenes
Kindly use the ‘CONTACT SUPPORT’ feature under Settings of the app in case of questions or issues. I will ensure your request is promptly answered or resolved.

Your continued support and valuable feedback play a crucial role in further improving this app.

73s,

Marcus, DL8MRE 1.76 07/23/2025 This update contains the following changes and improvements:

◉ This update adds an SSTV tool for receiving and displaying images from Slow-Scan TV (SSTV) signals. The ability to transmit SSTV is planned for a future update.

◉ Fixed some issues when using the Center mode

◉ Fixed an issue when switching to VFO-B

◉ Implemented some additional improvements and optimizations behind the scenes
Kindly use the ‘CONTACT SUPPORT’ feature under Settings of the app in case of questions or issues. I will ensure your request is promptly answered or resolved.

Your continued support and valuable feedback play a crucial role in further improving this app.

73s,

Marcus, DL8MRE 1.75 07/21/2025 This update contains the following changes and improvements:

◉ Missing 60m Band added for Keyboard Shortcuts and Controller

◉ Improved POTA Tool accuracy from KHz to Hz

◉ Fixed an issue with POTA Spots

◉ Implemented some additional improvements and optimizations behind the scenes
Kindly use the ‘CONTACT SUPPORT’ feature under Settings of the app in case of questions or issues. I will ensure your request is promptly answered or resolved.

Your continued support and valuable feedback play a crucial role in further improving this app.

73s,

Marcus, DL8MRE 1.72 07/07/2025 This update contains the following changes and improvements:

◉ Fixed an issue with FT8 Grid submission

◉ Implemented some additional improvements and optimizations behind the scenes
Kindly use the ‘CONTACT SUPPORT’ feature under Settings of the app in case of questions or issues. I will ensure your request is promptly answered or resolved.

Your continued support and valuable feedback play a crucial role in further improving this app.

73s,

Marcus, DL8MRE 1.71 05/06/2025 This update contains the following changes and improvements:

◉ Implemented some additional improvements and optimizations behind the scenes
Kindly use the ‘CONTACT SUPPORT’ feature under Settings of the app in case of questions or issues. I will ensure your request is promptly answered or resolved.

Your continued support and valuable feedback play a crucial role in further improving this app.

73s,

Marcus, DL8MRE 1.70 04/24/2025 This update contains the following changes and improvements:

◉ A new Command Bar feature was added to start apps, send CAT commands or open Websites. Command Bar buttons can be displayed in a floating window and used along with keyboard shortcuts

◉ For the UltraBeam tool, it is now possible to manually tune to the current frequency

◉ Implemented some additional improvements and optimizations behind the scenes
Kindly use the ‘CONTACT SUPPORT’ feature under Settings of the app in case of questions or issues. I will ensure your request is promptly answered or resolved.

Your continued support and valuable feedback play a crucial role in further improving this app.

73s,

Marcus, DL8MRE 1.68 04/16/2025 This update contains the following changes and improvements:

◉ A few minor issues have been fixed
Kindly use the ‘CONTACT SUPPORT’ feature under Settings of the app in case of questions or issues. I will ensure your request is promptly answered or resolved.

Your continued support and valuable feedback play a crucial role in further improving this app.

73s,

Marcus, DL8MRE 1.67 04/09/2025 This update contains the following changes and improvements:

◉ Filter Bandwidth will now no longer changed upon connection

◉ Test Mode on PTT button is now working as expected

◉ A Div button was added to enable/disable Diversity

◉ A few additional minor issues have been fixed
Kindly use the ‘CONTACT SUPPORT’ feature under Settings of the app in case of questions or issues. I will ensure your request is promptly answered or resolved.

Your continued support and valuable feedback play a crucial role in further improving this app.

73s,

Marcus, DL8MRE 1.66 04/03/2025 This update contains the following changes and improvements:

◉ An issue with audio latency has been fixed

◉ It is now possible to use a CW straight key and not just a paddle

◉ Radio Test mode can now be enabled by right clicking the TX button

◉ It is now possible to toggle VOX via Controller

◉ A few additional minor issues have been fixed
Kindly use the ‘CONTACT SUPPORT’ feature under Settings of the app in case of questions or issues. I will ensure your request is promptly answered or resolved.

Your continued support and valuable feedback play a crucial role in further improving this app.

73s,

Marcus, DL8MRE 1.65 03/29/2025 This update contains the following changes and improvements:

◉ Improved FT8 decoding for weaker signals surrounded by big signals

◉ Added the possibility to adjust the overall audio gain for Mic, Speaker and Data under Radio Settings

◉ Fixed an issue with the ALC Meter scale

◉ Fixed an issue with the power slider

◉ The Power Off button now ask a confirmation before powering off

◉ A few additional minor issues have been fixed
Kindly use the ‘CONTACT SUPPORT’ feature under Settings of the app in case of questions or issues. I will ensure your request is promptly answered or resolved.

Your continued support and valuable feedback play a crucial role in further improving this app.

73s,

Marcus, DL8MRE 1.64 03/24/2025 This update contains the following changes and improvements:

◉ To prevent confusion, the Radio Mode K4 (Local) has been removed

◉ It is now possible to assign Macro Keys PF1 to PF3 to Keyboard or Controller Keys

◉ Memories are now working correct

◉ Long Pressing on the Waterfall to select the FT8 RX/TX frequency is now working

◉ A few additional minor issues have been fixed
Kindly use the ‘CONTACT SUPPORT’ feature under Settings of the app in case of questions or issues. I will ensure your request is promptly answered or resolved.

Your continued support and valuable feedback play a crucial role in further improving this app.

73s,

Marcus, DL8MRE 1.63 03/19/2025 1.62 03/14/2025