Source code : https://github.com/sblandford/sblandford.github.io
Web page for sending and receiving text or image encoded spectrogram. This will result in visible text on the waterfall plot of an SDR or WebSDR receiver.
It is also possible to display incoming messages.
Ideally, it will be connected using direct audio connections or USB to a phone or computer but it should also work acoustically, with some degradation in quality.
If it doesn't sound on mobile devices then just press Send TX again. This is a known issue I will fix later.
Nothing more or less than a cheat sheet with a practice morse key.
The Morse learning/training apps I have seen so far seem to jump over the first step of not knowing morse at all and needing to see the morsegf on the screen in order to do anything at all. That's all well and good when you already mostly know the letters/numbers and just need to brush up on your speed and test your memory, but no good at all until this essential first step is cleared.
Use Mouse, Touch or Spacebar to sound the key.
How I use it is to get a book, newspaper or any text then tap out everything I see in Morse code using the chart. Gradually I find I can tap out characters without looking it up and then whole words, sentences etc. I am working on the theory that learning to send Morse first etches the rhythm of each character into visual, sound and motor memory making it much easier to then recognise Morse when I hear it. I may be wrong. There may be better methods. I'm just following my gut instinct here and finding a method that I can keep at without getting easily distracted.
A Kiwi SDR using a Boni Whip antenna in Willesden Green, London.
Currently not the best signal to noise ratio and sensitivity but where it does seem to perform well is in the VLF range. A medium wave broadcast band stop filter is fitted.
There is noise around 2MHz during the day but it is quite quiet at night when everything around it is switched off. Getting an HF SDR to work at all in somewhere like London is always going to be a challenge. I intend to improve the performance going forward.