KD8CEC Amateur Radio

  Release DVPI Version 1.0 Version 1.0 and Version 0.95 are the same.  If you are using Version 0.95 you do not need to update to Version 1.0.  DVPiManager has some features added.  If you want to use features added in Versio 1.0, you only need to download dvpimanager. DVPi uses the USRP Client protocol.  When you install and use DVSwitch, you must read and comply with the license that appears. The user is responsible for the license for the use of DVPi.

Release DVPI Version 0.95 Version 0.95 is a candidate version of Version 1.0 so, If there are no major problems you won't need to upgrade to Version 1.0 DVPi uses the USRP Client protocol.  When you install and use DVSwitch, you must read and comply with the license that appears. The user is responsible for the license for the use of DVPi.

 Release DVPi Version 0.88 - Dual Mode, D-Star, Function Key 2 DVPi uses the USRP Client protocol. When you install and use DVSwitch, you must read and comply with the license that appears. Version 0.88 is a test version. If you want a stable version, please wait for Version 1.0.

 DVPi schematic final version I know some nice PCBs are designed for DVPi. I also ordered 5 samples of the PCB designed by EA7GIB and recently received it. However, I had to add one LED and one switch to the needs of users. But this is just an option. Add this feature only if you need it.

DVPi hardware expansion (PTT, Encoder and etc) DVPi can be used without any additional hardware. A Raspberry Pi, 3.5" LCD and USB sound card are enough for DMR communication. However, if you want to use DVPi more conveniently, or if you like to make it, I think it is good to configure the hardware as follows. This hardware is the final version. No hardware will be added to the DVPi anymore.  I would like to introduce the DVPi hardware expansion into several types. You can create DVPi the way you want. 

Creating Network Transceiver using DVSwitch #3.Encoder and PTT installation  (DVPi Version 0.5 released and Rotary encoder, PTT installed) I added some hardware extensions in version 0.7. Also read the article at Link below. http://www.hamskey.com/2020/08/dvpi-hardware-expansion-ptt-encoder-and.html This post describes the additions made in Version 0.5 and the encoder and PTT installation.

Improvements to use the FT8 protocol on the Cortex-M base Several experiments are underway to use FT8 on the Cortex-M base. The previous experiment can be seen in the link below. http://www.hamskey.com/2019/05/ft8-wsjt-x-20-protocol-decoding-in.html

FT8 (Wsjt-x 2.0) protocol decoding in Cortex-M for experiment I implemented FT8 signal decoding on the STM32F746G-Disc board for Expermental. I want to test whether Cortex-M based FT8 communication is possible. I used Wsjt-x 2.0 and some source code to enable FT8 decoding on the Cortex-M7 base.

How to use Voice Keyer in EU1KY with CEC Firmware V0.7 Version 0.7 is being prepared for deployment. Voice Keyer (or Voice Recorder) function was added in Version 0.7. If you only want to use it as a voice recorder, you do not need any modifications, Just need update the firmware. If you want to use it as a Voice Keyer, you need a very simple modification. 1.Modifications for use as a voice keyer 1.1 PTT Control Below is just one example. Only the part with PC817 is shown below. 1.2 MIC Input It uses a push switch to switch between microphone and AA. It is recommended to pass a small transformer between the transceiver and the AA.  Please use only one (Left or Right) because the speaker jack of AA is stereo. Recording and playback will operate in stereo. You can use either the left or the right one for you. 2.How to use Voice Keyer 2.1 Use Voice recorder Touch the 'Voice Keyer' The 'USB Host' menu has been moved to the Configuration secti...

How to use Audio DSP on Antenna Analyzer (Features included after CEC V0.5) Audio DSP is a function that filters the sound coming from the transceiver into a desired range. You do not need any hardware changes to use this feature. Just prepare your headphones. If you want to make a little bit better, you can add a very small $ 1 speaker to your board. I am preparing to distribute the test firmware (V0.52). Please wait 1 ~ 2 days.

EU1KY AA Firmware stabilization version update (V0.4) and mores about v0.4 V0.4 has been changed to the stable version without changing the version number. I and testers tested for about a week and did not have any problems, so I added V0.4 to the stable version list.

Release EU1KY AA Firmware CEC Version 0.40 ( How to using WSPR, FT8, JT65 TX Mode) This version is a development version and may be unstable, and some of the features included in this version may be removed from V1.0, Stabilized version V0.35 has been released, and stabilized version is posted separately. stabilized version :  http://www.hamskey.com/2019/03/eu1ky-antenna-analyzer-cec-stabilized.html

EU1KY Antenna Analyzer CEC stabilized version First of all, Thank you for using the AA CEC Version firmware. I was going to develop it at a little bit faster until it was Version 1.0. But there were quite a few users out there. Thank you so much. In addition, several excellent testers have done various tests to help stabilize the firmware. So I decided to divide the version into two. It is a stabilized version and a tester version. 1.About the stabilized version The stabilization version will be upgraded if the safety is verified by testers. Therefore, the improvement of the function will be a little late. The tester version will add new features and various tests will be done by great beta testers. Again, thank you for doing various tests. The stabilized version aims to use stable firmware rather than adding features. This page will continue to update the release information of the stabilized version. 2.Download the latest stabilization version Version 0....

Release Firmware CEC Version 0.33 (Issue found and fixed) for Antenna Analyzer(EU1KY) Stabilized version V0.35 has been released, and stabilized version is posted separately. Please download the latest stable version from the link below. http://www.hamskey.com/2019/03/eu1ky-antenna-analyzer-cec-stabilized.html The stable version will continue to be updated on the Link above. ---------------------- Version 03 has been added with some improvements and some simple features. A brief introduction is given below. Beginning with version 3, data conversion utilities are provided for antenna simulation or Matlab use. - Reasons for changing from Version 0.30 to Version 0.33 -> Version 0.34 (Stabilized version) As the memory usage increases, it seems that interference occurs in the communication with sd-ram. I've used as much memory as possible to reduce interference. I have made some modifications to avoid memory interference and it seems to be working normall...

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.