KD8CEC 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. 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.