KD8CEC Amateur Radio

  C-BOARD for UV-K5 I created an externally mountable DSP-Board to process digital signals from UV-K5. DSP-Board was named C-Board. C-Board is divided into versions ranging from the simplest version to one that can be equipped with GPS.

Historical note: this post documents an early 2024 build and is kept for reference. For current firmware, use C-Board Firmware v0.32 , and see CEC UV-K5 Firmware Source Is Now Open for the source code. Introducing UV-K5 Version 0.3Q (Stable version,  added FT8 QSO) Version 0.3Q is mostly the same as version 0.3C. If you are already using 0.3C and do not plan to run FT8, no update is required. Since 0.3C was tested by several beta testers and there were no major problems, we only changed the name to the stable version 0.3Q.

Historical note: this post documents an early 2024 build and is kept for reference. For current firmware, use C-Board Firmware v0.32 , and see CEC UV-K5 Firmware Source Is Now Open for the source code. ▶ Watch the HF 0.5 fullband walkthrough on YouTube → Subscribe to the KD8CEC YouTube channel for more UV-K5 HF videos. Related: UV-K5 · si4732 · HF full band  Introduction to UV-K5 HF 0.5 (Fullband receive version) This is an introduction to UV-K5 HF full-band reception firmware 0.4HF using SI4732-A10. This version is released separately from the existing UV-K5 CEC firmware version. because space is needed to store a large PATCH file to use SI4732-A10's SSB. This article only describes the features newly added in Version 0.5. Please check the links below for full features. How to modify your hardware http://www.hamskey.com/2024/02/uv-k5s-hf-full-band-reception-lsb-usb.html Version 0.3HF (Most feature descriptions are provided) http://www.hamskey....

Historical note: this post documents an early 2024 build and is kept for reference. For current firmware, use C-Board Firmware v0.32 , and see CEC UV-K5 Firmware Source Is Now Open for the source code.  Introducing UV-K5 Version 0.3C (Added WSPR , APRS TX with PC ) Version 0.3C includes tasks associated with computers. You can use the same cable you used to update the firmware. If you just want to receive APRS you will need some modifications. This modification can also be used for FT8 communication that will be supported in the future.

Historical note: this post documents an early 2024 build and is kept for reference. For current firmware, use C-Board Firmware v0.32 , and see CEC UV-K5 Firmware Source Is Now Open for the source code.   Introduction to UV-K5 HF Fullband receive Version 0.41 (Changed from 0.40) This is an introduction to UV-K5 HF full-band reception firmware 0.4HF using SI4732-A10. This version is released separately from the existing UV-K5 CEC firmware version. because space is needed to store a large PATCH file to use SI4732-A10's SSB. 0.4HF added several functions to use SSB for shortwave radio and amateur radio.

Historical note: this post documents an early 2024 build and is kept for reference. For current firmware, use C-Board Firmware v0.32 , and see CEC UV-K5 Firmware Source Is Now Open for the source code.  Introducing UV-K5 Version 0.2V (Spectrum & Waterfall added) The goal of this version was to secure memory to create Version 0.3 Deleted the existing FM radio program and created a lighter, more independent FM radio program. And added a simple spectrum function.

Historical note: this post documents an early 2024 build and is kept for reference. For current firmware, use C-Board Firmware v0.32 , and see CEC UV-K5 Firmware Source Is Now Open for the source code. Introduction to UV-K5 HF Fullband receive Version 0.3 This is an introduction to UV-K5 HF full-band reception firmware 0.3HF using SI4732-A10. This version is released separately from the existing UV-K5 CEC firmware version. because space is needed to store a large PATCH file to use SI4732-A10's SSB. 0.3HF added several functions to use SSB for shortwave radio and amateur radio.

Historical note: this post documents an early 2024 build and is kept for reference. For current firmware, use C-Board Firmware v0.32 , and see CEC UV-K5 Firmware Source Is Now Open for the source code.  Introducing UV-K5 Version 0.2P (APRS added)  (stable version) This version is a stable version with various features added to APRS test version 0.2B.  Please refer to the Version 0.2B(C) post for frequency settings and MySSID settings used in APRS. http://www.hamskey.com/2024/02/introducing-uv-k5-version-02b-aprs.html

UV-K5’s HF full-band reception (LSB, USB) circuit (confirmed version) After releasing the full band reception firmware of UV-K5 using SI4732-A10, various experiments were conducted. This post shows the experiment results and the final circuit diagram.

Historical note: this post documents an early 2024 build and is kept for reference. For current firmware, use C-Board Firmware v0.32 , and see CEC UV-K5 Firmware Source Is Now Open for the source code.  Introducing UV-K5 Version 0.2C (APRS) This version is a test version. If there are no major problems, the version number will be changed to 0.2P and released again in one week. If you want a stable version, please download it after one week.

Historical note: this post documents an early 2024 build and is kept for reference. For current firmware, use C-Board Firmware v0.32 , and see CEC UV-K5 Firmware Source Is Now Open for the source code.  About UV-K5 CEC Firmware Version 0.1X (from v0.1p) UV-K5 running CEC firmware v0.1X — main screen after upgrading from v0.1P. 1.About Version 0.1X This version is the stable version of UV-K5 Version 0.1P In Version 0.1P, many things were changed, including the internal variable structure, and we received feedback for about 8 days to check if there were any problems. The original plan was to just change the name from Version 0.1P to Version 0.1X, but several features were added as follows. Please read Version 0.1P for main features 2.SSB Filter (bandwidth)   The filter can select one of these : VFO, 3K, 2K, 1.7K, 3K+, 2K+,1.7K+     This filter operates only in SSB mode and is disabled in existing FM mode.  If you select a filter with +, th...

 Modification of SI4732-A10 for full HF band reception on UV-K5 I will guide you on applying SI4732-A10, which is mainly used in shortwave radios that support SSB, to UV-K5.   Firmware Version CEC_0.1HF

Historical note: this post documents an early 2024 build and is kept for reference. For current firmware, use C-Board Firmware v0.32 , and see CEC UV-K5 Firmware Source Is Now Open for the source code. ▶ See the UV-K5 CW keyer in action on YouTube → Full CW keying series (paddle, memory keyer, setup) on the KD8CEC YouTube channel . Related: UV-K5 · CW   Introducing UV-K5 Version 0.1P (CW Mode) CW-related functions have been added to version 0.1P. The spectrum function has been removed but is maintained in the source code. Later, when the source code is distributed, you can activate it and use it if necessary. This version is for testing purposes only. It will be redistributed as the stable version 0.2 in approximately 1-2 weeks. If you don't want to beta test, you can wait a week or two and download 0.2

Historical note: this post documents an early 2024 build and is kept for reference. For current firmware, use C-Board Firmware v0.32 , and see CEC UV-K5 Firmware Source Is Now Open for the source code.  Introducing UV-K5 Version 0.1M (SSTV, Text Configuration) v0.1M — SSTV and text-based configuration on the UV-K5. In version 0.1M, items related to text settings and SSTV transmission function were added. As previously announced, only compiled binaries will be released from 0.1M until 1.0 is released.When the version is upgraded to 1.0, we will organize the source code and release it together. It probably won't take long. 1.Improved text input    Most of the contents are the same as the existing firmware. I only did something very small.  Since you will be using text input frequently in the firmware (UV-K5 CEC version), changed it to make input more convenient. I only changed the function of the * button and the F button very slightly. Once you select a lett...

Historical note: this post documents an early 2024 build and is kept for reference. For current firmware, use C-Board Firmware v0.32 , and see CEC UV-K5 Firmware Source Is Now Open for the source code. UV-K5 running CEC firmware v0.1C — early 2024 build. Two features were added in V0.1c From the next version, versions with experimental elements will be published. The source code for this version has been released together. Versions 0.3 to 0.9 are in the development stage, and I will release the source code together with version 1.0 1. Version 0.1C added a function that can detect signals even while the frequency is moving. This feature is supported by most radios except toy radios. It's like turning the radio dial to tune the frequency. It is the same as turning the knob on an HF radio to find a signal.   Select Live.S from the menu. v0.1C feature screens on the radio display. If you select "LIVE", you can detect the signal even when moving quickly by pressing t...

Historical note: this post documents an early 2024 build and is kept for reference. For current firmware, use C-Board Firmware v0.32 , and see CEC UV-K5 Firmware Source Is Now Open for the source code. UV-K5 firmware development begins And Release 0.1b  I had a vacation last week. I was allowed about three months. The past few weeks have been a variety of experiments to develop the firmware. I start my work based on egzummer's firmware, which is the one most people use. 1.Version 0.01b information https://github.com/phdlee/uvk5cec/releases All basic features of this source are based on egzummer's date of January 2, 2024. I worked on the first firmware. I did what was requested by the user. Alternatively, functions that are not greatly needed in amateur radio were changed to those that are needed in amateur radio. This version is stable because no major modifications have been made to the existing source code. I took the source code from  https://github.com/egzumer/uv-k5...