KD8CEC Amateur Radio

Create Network Transceiver - DVPi Audio In/Out adjustment I will make a video for this post and post it on YouTube. (Next monday) Describes the settings for DVPi audio input/output. If you are familiar with Linux, you probably already know. In particular, if you are transmitting too loud or too small when you are TX Mode, be sure to read this article. This is very important for using DVPi well, Let me explain how I set it up.

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...

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.

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.)

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

Backup uBITX configuration using QR Code If you are using the CEC firmware and Nextion LCD, you can back up the configuration file in a simple way. If you have an internet-enabled mobile phone, you can back up various configuration files.

How to use Nextion LCD #3 - Practice for use with a transceiver I do not know much about Nextion LCD. During the production of uBITX Firmware which is HF Transceiver, I was introduced by several OMs, The ultimate goal of this article is to create a GUI for the HF Transceiver. uBITX CEC Version officially supports Nextion LCD from version 1.09. I will support 2.4 "and 2.8" LCD by default. You do not need to understand everything below to connect uBITX Nextion LCD. Just use the Nextion Editor to load the firmware on the Nextion LCD. If you want to create your own GUI, please read these articles. How to use Nextion LCD Series #1 Start Nextion LCD #2 Programming and application #3 - Practice for use with a transceiver #4 Applied to HF Transceiver #5 Advanced Application (Applied to various sizes)

Frequency adjustment of uBITX (Si5351) How to calibration for Frequency fine adjusting This document describes how to precisely adjust the frequency of the Si5351 module Applies to all devices that use the Si5351 module, such as uBITX I used a very old instrument to show the difference in frequency for verification of this post.

Using HDSDR with HF Transceiver  (Examples of using RTL-SDR in uBITX #2) Modified - Add Videos CAT Support uBITX Firmware CEC Version supports SDR connections from Version 1.07. http://www.hamskey.com/2018/04/how-to-connect-sdr-rtl-sdr-to-ubitx-and.html

How to use Si5351 #2 - Si5351 Library for WSPR on QRP Transceiver I introduced two ways to use the Si5351 in the previous post.  and  experimented with two different methods of generating clocks on the Si5351. I want to use both methods together.

How to use Si5351 #1 - Source Analysis Learn how to use the Si5351 for use with QRP radios include uBITX ,WSPR Beacone, Anatenna Anaylyser and many rf tools As I am familiar with the AD9850, I first tried the Si5351 in uBITX. feel that using the Si5351 is suitable for QRP radios.

RPI Modification for Wsjtx-Portable -Built-in sound card (usb type) -Built-in GPS (usb type) -Added power connector on the side

I'm posting this experience to help new programmers. This article shows how to solve problems for new programmers. I do not think my method is the best. I think that it is one of various ways to solve an issue. A program called WSJ-X started to become popular. It was a great program. even the program is open source based.

CAT support uBITX firmware Import Note uBITX Firmware CEC Version 1.06 has been released. Please click the link below. http://www.hamskey.com/2018/03/cat-support-ubitx-firmware-cec-version_24.html

This is a guide for uBITX's original firmware (or source code) users to use uBITX memory manager. Unfortunately, the original source can not be used as it is.

A plastic plate was used so that the pattern of the substrate did not touch the metal. I was able to connect to the car whip antenna and received only digital signals such as JT-65 and FT-8 (7.074Mhz, 14.074Mhz USB) To compare with FT-857, I connected the same antenna to the FT-857. I did not feel a big difference because the area and antenna was not good. Because digital communication is possible using FT-857 in the this condition,  uBITX is also expected to be enough for digital communication.