RF-Kit RF2K+ firmware

Firmware history

All versions below were published by RF-Kit on rf-kit.de. Third-party and modified firmware is never listed.

1. Version G108C132 Latest Released Jan 9, 2022 First seen Sep 7, 2026

   Implements API for external program control with minor bug fixes — summary by updatemystuff.com

   Source: rf-kit.de

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   RF2K-S and 2K+ with controller upgrade SW G108C132 Release information and upgrade procedure

   Rel​ease features:

   • Implemented API
   • We would like to thank Dave WO2X for his test effort and valuable feedback. Great job !

   With this API ( Application Programming Interface ) the RF2K can be controlled from any program like Note-Red

   You’ll find the documentation on our website under Docu JSON file for download is also there.

   Min​or bug fixes

   Upgrade procedure:

   This update can be installed using the build in update function

   What’s next?

   Amplifier TCI command structure extension

   Revisit and improve existing functions

   Update documentation with the new functions

   Vy73 de DH3NAB

   Reinhard and Team

   Release notes & download
2. Version G92C112 Released Aug 10, 2021 First seen Sep 7, 2026

   Fixes controller timing bug that caused incorrect model identification. — summary by updatemystuff.com

   Source: rf-kit.de

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   RF2K-S SW G92C112 Release information and upgrade procedure

   We would like to inform you that we needed to release a bug fix SW updae which is mandatory to al​l RF2K-S and RF2K+ with new controller.

   Release features:

   • Bug fix for SW identification of RF2K-S and RF2K+
   • To identify the version of your amp we introduced jumper C on the controller.
   • During boot up the SW is reading the status of this jumper and behaves like an RF2K-S or RF2K+
   • Timing issue in the controller could boot your RF2K-S as an RF2K+ which is incorrect.
   • We fixed the issue and it has been tested by Betta Tester as well.

   Upgrade procedure:

   This update can ​be installed using the build in update function.

   What’s next?

   Amplifier TCI command structure extension as there are no TCI or CAT commands defined for amplifier.

   Updating User Manuals to include latest changes.

   Vy73 de Reinhard DH3NAB

   Release notes & download
3. Version G91C109 Released Jul 30, 2021 First seen Sep 7, 2026

   Adds SunSDR TCI support and 6m tuner functionality, with minor bug fixes. — summary by updatemystuff.com

   Source: rf-kit.de

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   RF2K-S SW G91C109 Release information and upgrade procedure

   We would like to inform you that we released

   G91C109

   which you can online upgrade starting today July 30.

   With this release RF2K-S and RF2K+ with controller upgrade are the first amplifier who supports Expert Electronics SunSDR TCI command structure.

   Release features:

   • SunSDR TCI support with frequency taken from EESDR
   • The H​ost IP address to use is not the SunSDR radio but the IP address of you PC with EESDR

   6m Tuner usage now possible On 6m most antennas are mono-band antennas and don’t need much tuning.

   Therefor only manual tuning is possible on 6 with limited L and C combination.

   Up to 255nH and 51pF are allowed .

   Due to the 100kHZ segmentation just a few settings are need to be stored to cover the 6 band.

   On QSY Tuner will go​ automatically in AUTO if in MAN.

   Minor bug fixing

   Upgrade procedure:

   This update can be installed using the build in update function.

   Once upgraded you need to install TCI in the Interface / TCI - Menu

   What’s next?

   Amplifier TCI command structure extension as there are no TCI or CAT commands defined for amplifier.

   Updating User Manuals to include latest changes.

   At this point I would like to say thank you to the Expert Electronic team for their very professional support to get to this stage.

   I also wish all SunSDR users fun with the new feature.

   Vy73 de DH3NAB

   Reinhard and team

   Release notes & download
4. Version G82C100 Released Apr 30, 2021 First seen Sep 7, 2026

   Added cross needle and contest display modes with per-band tuner control and boot fix. — summary by updatemystuff.com

   Source: rf-kit.de

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   RF2K-S SW G82C100 Release information and upgrade procedure

   We would like to inform you that we released

   G82C100

   which you can online upgrade starting today.

   With this release we completed all promised features and even more. So​me of the already implemented features we’ll be revisited and improved in the future. We’ll not stop making the RF2K one of the most advanced amplifier.

   Release features:

   • Implemented Cross needle display
   • You can switch between the displays just touch the power reading area

   Implemented Contest Display. Contest Display can be selected in Menu Display Type. You can size the display with VNC to a much smaller area of your PC display and still have the most important information visible. You might change your VNC Scaling to your needs

   Implemented display parameter in in Linux config.sys This should fix the issue with black screen after booting up the amp

   Implemented Tuner Off on a per band base You can now select on which band you like to use the build in tuner on a per band base.

   This way you don’t have to s​tore bypass for any given band you don’t need the tuner.

   The RF-KIT Logo is displayed in the Tuner area clearly indicating that the tuner is of.

   Implemented Band Data output on the DB-15 connector

   Minor bug fixing

   Upgrade procedure:

   Due to some changes in the Linux system you need to reboot the RF2K-S twice . Just follow the instruction on the display.

   What’s next?

   TCI interface Integration together with SUNSDR Go all IP.

   +++++

   Have fun

   Vy73 de DH3NAB

   Reinhard and team

   Release notes & download
5. Version G73C94 Released Mar 12, 2021 First seen Sep 7, 2026

   Multiple antenna selection per band with external antenna switch and display controls — summary by updatemystuff.com

   Source: rf-kit.de

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   RF2K-S SW G73C94 Release information and upgrade​ procedure

   We would like to inform you that we released

   G73C94

   which you can online upgrade starting later today.

   Release features:

   • Changed antenna selection.
   • Now you can assign more than one antenna per band.
   • Last used antenna will be used returning to the band.

   Changed antenna selection on main display.

   Implemented support of an external antenna switch. Supporting up to 16 antennas with stored tuner values..

   Changed some naming in the menu structure

   Reset button will turn red when error

   Sleep Timer implemented

   Display On/Off implemented This feature came too late for the documentation but is a kind of self-explaining.

   Minor bug fixing

   Also today we release the updated User Manual in German and English (can befound in Docu aera). Some of the features out of the last SW release were not described in the user manual, so it was time to do some work on documentation as well.

   Joerg DF9LJ did a video about his antenna switching using the external antenna switch feature.

   I recommend to watch that video for a bett​er understanding about the new feature.

   https://youtu.be/Sv7Jwvotogw

   Upgrade procedure:

   This upgrade may be installed using the built in update function.

   What’s next?

   Band Data output

   Cross needle power meter

   Contest display Minimum info and control of the RF2K-S to fit on a busy display.

   +++++

   Have fun

   Vy73 de DH3NAB

   Reinhard and team

   Release notes & download