Being only a hobby programmer I developped a few pieces of software that might be useful to other hams :

All software below is copyrighted freeware. This means that you can use it and distribute it freely but any commercial use (including adding it to a commercial traded "software collection") is strictly forbidden without prior written permission of the author.

The author can not be held liable for any direct, indirect, consequential or incidental damages to other pieces of software, equipment, goods or persons arising from the use of this software.

By downloading one or more of the software packages you accept the above terms of copyright and disclaimer.

Rik Strobbe (ON7YD) , 2000-2014

In order to beat the high QRM and QRN levels on the 136kHz ham band very slow CW is used (speeds going from 0.4 WPM even down to 0.01 WPM). QRS allows you to key your TX at these extreme slow speeds using the serial or parallel port of your PC.
Version 3.17 is Win3 compatible but will not support the parallel port under WinNT, Win2000, WinXP etc.
Version 4.14 has full support of the parallel port but requires at least Win98.

With QRSS you can dig signals out of the noise. If the signal is too strong it's no fun, as you could copy it in traditional CW also. If the signal is that weak that you cannot copy it, even in QRSS, it's no fun either. MultiTone solves this problem by transmitting up to 8 signals at different power levels. All signals are spaced some Hz, enough to separate them with a QRSS viewer. And each signal is different of course. MultiTone creates a wav file based on the settings you give and plays this wav file via the soundcard. Alternatively you can save the wav file and play it with another application.

A number of European stations on 136kHz are regulary doing transatlantic tests in QRSS (very slow CW) or DFCW (dual frequency CW) modes. At the other side of the pond US and Canadian stations are trying to copy the European signals using ARGO or similar software. Some of these stations put their screen capture real-time on the web. Rapido allows you to automatically download these screencaptures and show them on screen at a regular interval, making it possible to follow the transatlantic propagation in real-time.

Allows you to automaticaly upload ARGO screen captures (or others) to your webpage or copy them on your local disk in a convenient way.

RCL meter
RCL meter is a low cost and minimal hardware solution for measuring capacitances (5pF to 5uF), inductances (5uH to 50mH) and resistances (1 Ω to 10 MΩ), using the PC sound card. The required external hardware is just 2 resistors and 2 capacitors.

Calculates the inductance of a single layer coil based on the coil dimensions and vice-versa.
A DOS application, but runs also under windows.

Soundcard based digital oscilloscope.

Problems to keep your local QSL manager happy ... because you don't know how to sort your outgoing QSL cards the right way ? Enter the callsigns or prefixes and QBuS tells you how to sort your cards !

Crop and convert JPEG files to the SSTV Martin M1 standard (320x240 pixels).