KD8CEC Amateur Radio

Release EU1KY AA Firmware CEC Version 0.53  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 V0.40 has been released, and stabilized version is posted separately. stabilized version :  http://www.hamskey.com/2019/03/eu1ky-antenna-analyzer-cec-stabilized.html

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

How to Frequency Calibration on EU1KY Antenna Analyzer I will calibrate the frequency of AA in two ways. One is using the instrument and the other is using the SSB radio without the instrument. To use an AA as a generator to test a radio, you must have a calibration procedure.  Also To use the WSPR, FT8 generator included in Version 0.40, the frequency should not be too different.

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...

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

How to use Wsjtx-Portable (Wsjtx 1.8.1 based Small LCD version) This article is based on Wsjtx-Portable Version 0.5. The video you shot while creating this document are at the bottom of this document.

The portable wsjt-x device in pocket is now named. As the title says, it's simply called Wsjtx-Portable . Wsjtx-Portable is a Wsjt-X program-only device in pocket. I wanted to make it available for use in SOTA, qrp, automobiles and outdoor.

The following link explains why created WSJTX-Portable. http://www.hamskey.com/2018/01/find-and-fix-bugs-in-non-debug.html

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.

Use CEC version firmware 0.25 or later of uBITX. The following examples are based on version 0.27. We will post the 0.27 version as the test ends. All of the examples below only describe connections to uBITX. Please refer to the manual or other documents for how to use the program. uBITX Firmware 0.27 :  http://www.hamskey.com/2018/01/release-version-027-of-cat-support.html

Use CEC version firmware 0.25 or later of uBITX. The following examples are based on version 0.27. All of the examples below only describe connections to uBITX. Please refer to the manual or other documents for how to use the program. uBITX Firmware 0.27 :  http://www.hamskey.com/2018/01/release-version-027-of-cat-support.html

Nowadays, digital communication is popular in amateur radio. JT65 and FT8 are capable of DX communication with weak signals. In the era of urbanization, the space for installing antennas is gradually diminishing. So we seem to prefer communications that can be transmitted away with weak signals. Install wsjtx, the most representative software for weak signal digital communication, in Raspberry Pi. The basic setting for Raspberry Pie is 'Raspberry pi 3 Setup (basic)' on this blog. http://www.hamskey.com/2017/12/raspberry-pi-3-setup-basic.html If the installation order changes, it may not work normally or you see the many erros because wsjtx uses other libraries. 0.Turn on Raspberry PI 1.apt-get update   Click Terminal Icon on taskbar   type 'sudo apt-get update' [enter] 2.Click Raspberry pi Icon on taskbar -> Preferences -> Click Add/Remove Software 3.type 'fldigi' enter on left top edit box 4. Check all items 5.Press ...

1.Items   Raspberry pi 3 or 2   SD Card   SD-Card Read Writer   and Computer... 2.Down load Raspberry pi OS Image   https://www.raspberrypi.org/downloads/raspbian/    Click Raspbian desktop  you choice option, direct download (Download Zip) button, and download via torrent (Download Torrent) button 3.Extract the downloaded file. 4.Download & Install Win32diskimager   download from https://sourceforge.net/projects/win32diskimager/   5.Insert the SD card into the SD card reader. 6.Connect the SD card reader to the computer. 7.Run Win32diskimager    Select to extracted Raspberry pi os image. Select Device (SD-Card Drive) 8.Click to [Write] Button Confirm the disk name and press Yes. (Warning) If you do not select SD-CARD and chose the hard disk, you lose data. 9.When all the processing is completed, remove the SD-Card from the reader. 10.Insert the SD-Card into th...