KD8CEC Amateur Radio

Release CEC Firmware v1.121 for uBITX V5 I did some experiments with the help of a beta tester with V5. he experiment was mainly to pass the modified filter. You can see videos related to the experiment below. (The firmware download link is at the bottom of this post)

Use the filter and Attenuator to test the VNA(Track scope) function in Antenna Analyzer I have measured the performance of the S2 port added to the EU1KY Antenna Analyzer.  

Release Firmware CEC Version 0.1 for Antenna Analyzer(EU1KY) I would like to thank EU1KY and DH1AFK OM for making and improving this wonderful antenna analyzer. The Antenna Analyzer is already perfect enough. I just want to add a little bit. This project will continue until CEC Version 1.0.

What's new with uBITX V5 #2 -  LPF and other UBITX Version 5 with improved  filter for spur has recently been released. I always appreciate Ashhar Farhan, who always makes great work. Information on uBITX Version 5 can be found on the link below. and you can download to sourcecode with schematic https://github.com/afarhan/ubitx_v5 uBitx v5 Changes https://groups.io/g/BITX20/wiki/uBitx-v5-Changes. What's new with uBITX V5 #1 http://www.hamskey.com/2019/02/whats-new-with-ubitx-v5-1-changed-if.html At the end of this article is a link to download a CEC firmware test version.

4. Antenna Analyzer(EU1KY) - How to Setup and Calibration The setup and calibration methods are the same for most firmware, Only the menu position is different. I will use AA Firmware CEC version for convenience. (AA firmware CEC Version will be released within one week.)

What's new with uBITX V5 #1 - Changed IF frequency UBITX Version 5 with improved  filter for spur has recently been released. I always appreciate Ashhar Farhan, who always makes great work. Information on uBITX Version 5 can be found on the link below. and you can download to sourcecode with schematic https://github.com/afarhan/ubitx_v5 uBitx v5 Changes https://groups.io/g/BITX20/wiki/uBitx-v5-Changes.

Antenna Analyzer(EU1KY) - How to Firmware Update  You can easily find some Firmware for Antenna Analyzer(EU1KY) on the internet. I will also release imporved firmware soon. if you have AA (EU1KY's antenna analyzer), you cans use all the firmware. i will try to explain it in this article ( AA firmware CEC Version will be released within one week.)

This document will continue to change as we make changes or additions. If you have an antenna board, you can make your own antenna analyzer in 30 minutes. also, you can buy assembled finished products. If you have purchased a finished product, just follow the modifications below. This document was changed on March 28. In order to prevent mistakes due to different output lines for each RF board, Piezzo connection, RTC connection, Battery voltage connection. mar/26 version for developer (my developing environment) added power, rtc, piezzo, s2 port, and changed wire color for vi, vv -> left, out

1.FAA-450 Antenna Analyzer (EU1KY) Introduction I recently received a RF board. It is in the form of a docking board on the STM32F746 Discovery board. When you connect the RF board and the STM32F746 Discovery board, they operate as a very good antenna analyzer. 1.Introduction (this article) -  http://www.hamskey.com/2019/02/faa-450-antenna-analyzer-eu1ky.html 2.Create FAA-450-  http://www.hamskey.com/2019/02/assembling-faa-450-antenna.html 3.How to update the Firmware -  http://www.hamskey.com/2019/02/3-antenna-analyzereu1ky-how-to-update.html 4.How to Setup and Calibration -  http://www.hamskey.com/2019/02/4-antenna-analyzereu1ky-how-to-setup.html 5.Principle of Antenna Analyzer 6.Antenna Analyzer Firmware Improvement As well as a general antenna analyzer, it is possible to measure the phase so that the characteristics of the antenna can be easily grasped.  I accidentally used this antenna analyzer, but it was incredible. So I decided to analyze this antenna analyzer