My original Morse Training Software
 in the Practical Wireless magazine in 1983 ! !

I created the first Morse Trainer in 1981.  It was created for use with the ZX80 and ZX81 computer invented by Sir Clive Sinclair.
I was advertising it in the Practical Wireless magazine, using a tiny 3 line advert. Yes, I did sell a few.  In 1983 Practical Wireless magazine took it over and they advertised it in HALF A PAGE for many months. I write an article accordingly..
Needless to say, they sold load of the programme on a special mini tape cassette.
There is circuit diagram showing the electronic interface between the ZX81 and the audio output unit...
I still have a copy of that magazine, dated August 1983. 

Below, I have added a copy of each page to see the content of what I wrote for them. It was agreed that I retained the copyright of the article and the Morse training software.  

NOTE: The up to date Pracical Wireless Magazine is availabe. Click here to visit them in a seperate web page: CLICK HERE