WB4KDI Engineering Notebook

Old JT65-HF Info

JT65-HF is no longer actively developed and is considered at "end of life" as of 2013.

JT65-HF

  1. Custom Settings
    1. CQ TEXT - RED
    2. HAS MY CALL - LIME
    3. ONGOING QSO - SILVER
    4. Color-map (for waterfall) - Linrad
    5. Speed (for waterfall) - 2
    6. Smooth is checked (evens out the background level on the waterfall)
  2. Set receive level on quiet band to 0. Reduce line level or RF Gain on other noisy bands as necessary to keep background level at 0.
  3. TIME SYNC!

Windows O/S

  1. Windows Notes
    1. Multi-decoder taking too long? Adjust application priority with task manager.

Linux O/S

Two options:

    1. Linux Notes (Ubuntu 10.4 LTS)
      1. The existing Linux binary has a time limit that has now expired.
      2. Decompress and unpack archive into your home directory: tar -zxf jt65-hf.1.0.9.2.tar.gz
      3. With synaptic, add fftw3, libgfortran3 and portaudio2 if not already installed.
      4. Open terminal, change directory to where the archive was unpacked (cd jt65-hf-1.0.9) and run ./install.sh
      5. To uninstall: ./uninstall.sh
      6. NOTE: There may be unknown problems with the Linux version.
      7. Does not work with Ubuntu 12.04.

  2. Windows Application in WINE
    1. Linux + Wine Notes (for JT-HF version 1.0.7)
      1. winetricks corefonts
      2. Run JT65-HF SETUP but do not run the FFT optimizer automatically.
      3. Once SETUP finishes, then go to the optFFT directory and run jt65-hf there. This program will calculate the FFT values and will take a while.
        Do NOT run the FFT optimizer.
      4. With ALSA, set the default sound input and output to the correct device before starting JT65-HF in Wine. The sound device settings within the JT65-HF Setup Menu don't work under Wine.
      5. When JT65-HF is started in Wine it will take longer to initialize than with Windows -- be patient.
      6. I haven't tried to use PTT, I used VOX with the Linux setup.

What is the minumim required speed of the system microprocessor?

Here is the Linux version of JT65-HF running on an AMD Duron 950MHz system:
AMD Duron 950MHz CPU, 512 MB memory, Ubuntu 10.04.4, Grig, Simple SDR receiver

160 Meter DX with JT65

Don't think you can work DX on 160 Meters with a simple antenna and lots of line noise? Think again: