Low Frequency

Spectrum Lab - DL4YHF's Audio Spectrum Analyser Spectrum Lab or Speclab started as a simple FFT program running under DOS a long time ago, but it is now a specialized audio analyzer, filter, frequency converter, hum filter, data logger and more. Can be used for MTHELL QRSS, DFCW, PSK, MSK, Castle

Baudline signal analyzer - A Linux based FFT spectrum analyzer designed for time-frequency browsing and scientific data visualization. Oscilloscope waveform, statistical histogram, accumulated spectral trace,Weak Signal reception, continuos data logging, FFT Analyzer and specialized measurement windows.

Linrad - Multiplatoform freeware DSP software. Linrad has its origin in software that was developed for 144 MHz EME CW but it is quite general and should be seen more like a kit for designing a receiver that a receiver for some particular usage. It can be used as a CW receiver with a small time delay and a fast waterfall graph. A dsp for conventional receiver to imporve signals readability, a spectrum analyzer.

Spectrum Lab  ^pop - DL4YHF's Audio Spectrum Analyser Spectrum Lab or Speclab started as a simple FFT program running under DOS a long time ago, but it is now a specialized audio analyzer, filter, frequency converter, hum filter, data logger and more. Can be used for MTHELL QRSS, DFCW, PSK, MSK, Castle

PSK08 for Spectrum Lab - PSK08 for Spectrum Lab.Small user file to configure the software for slow PSK.

Argo - Argo is a freeware windows viewer for MTHELL, Slow CW, like QRSS and DFCW. Can be used for EME operations by I2PHD and IK2CZL

Argo upload - Allows you to automaticaly upload ARGO screen captures to your webpage in a convenient way. by ON7YD

Baudline signal analyzer - A Linux based FFT spectrum analyzer designed for time-frequency browsing and scientific data visualization. Oscilloscope waveform, statistical histogram, accumulated spectral trace,Weak Signal reception, continuos data logging, FFT Analyzer and specialized measurement windows.

ChirpPix - ChirpPix converts a bitmap image to a wave file, which can then be sent by a SSB transmitter and received on spectrogram waterfall displays Image Transmission using ChirpPix and ChirpHell

EasyGram - This Windows MTHELL QRSS NDB and DFCW program extends possibilities of well-known Spectrogram with some new useful features. It enables to define the scrolling area to any size, it can save screen shots in defined time periods , it enables to browse the saved pictures easily by OK1FIG

glfer - glfer is a program for reception and transmission of QRSS/DFCW signals. It is composed of two main parts: the spectrogram window, where you can see the spectrum of the received signal vs. time the transmission functions, to emit cw characters at a slow but precisely controlled speed, using the QRSS (slow CW) or DFCW (Dual Frequency CW) modes

Linrad - An open source software defined receiver for Linux, Free DSP and Windows

Linrad - Multiplatoform freeware DSP software. Linrad has its origin in software that was developed for 144 MHz EME CW but it is quite general and should be seen more like a kit for designing a receiver that a receiver for some particular usage. It can be used as a CW receiver with a small time delay and a fast waterfall graph. A dsp for conventional receiver to imporve signals readability, a spectrum analyzer.

Meet Jason - Jason is a keyboard mode displaying the received message as text. Expecially indicated for LF operations

MT Hell - MT-Hell software for 16 bit Soundblaster cards. Sends seven parallel tones with careful dot shaping for minimum interference, and transmits a very nice sound by G3PPT

PSK08 - G4JNT - PSK08 Software for the 56002EVM. PSK08 is a data communications mode identical in operation to PSK31, but operating at one quarter the speed, ie. approximately 8 symbols per second.

QRS 4 - ON7YD slow CW and DFCW TX program for Windows, works with Argo. By Rik Strobbe

Rapido - Rapido will provide an automatic download of a JPEG picture from the internet at a certain time interval and show the picture on screen. In addition it allows you to save the downloaded picture on disk.

Spectran - Program designed to do spectral analysis and real-time audio filtering on reception of audio signals for EME, VLF, SETI applications. Offer support for MTHELL, QRSS, DFCW, NDB, WSJT by I2PHD

WSPR - WSPR implements a protocol designed for probing potential propagation paths with low-power transmissions. Stations with internet access can automatically upload their reception reports to a central db