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Showing posts from 2017

low-cost camera pan tilt for Amateur radio (First Test and First Modification)

I bought a pan tilt controller for the camera a few days ago.
perhap it's use for Amateur radio antenna, Especially, it seemed good to use it for the satellite antenna which requires not only the horizontal rotation but also the vertical rotation.

It will cost $ 150 and will be very successful if you can raise the satellite antenna.
It uses AC24Volt and is controlled by 485 communication. connected using the usb to 485 sold on the Internet.
The default protocol for this is pelco-D, and programs for pelco-d are easily found on the Internet.

I am developing a program dedicated to this and will release it soon.

1.First Test - Elevator test

The maximum angle seems to be insufficient.

2.Rotator test

The angle of rotation is very perfect. There is a limit setting part at the lower part, and if one is removed, it can rotate up to 360 degrees.

3.Simple Modification for Elevator

open pantitle

found Limiter for elevat…

Install WSJT-X and fldigi on Raspberry pi

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.

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 [OK] Button

6.wait moment, then type pa…

Raspberry pi 3 Setup (basic)

  Raspberry pi 3 or 2
  SD Card
  SD-Card Read Writer
  and Computer...

2.Down load Raspberry pi OS Image

 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

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 the raspberry pi.

11.Connect a keyboard mouse monitor, network cable, etc. to the raspberry pi.
12.Connect the power to the raspberry pi - Mi…

First Receive using uBITX (HF All band Transceiver kit)

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.