Hello radio friends, it's going on.....
First I started with an Arduino CW decoding project and then expanded with a small CW transmitter of just 1W. It is basically an old USA amateur transmitter kit from the 1950s. I was able to receive 800km myself via websdr.org. Completely crazy because you can check the frequency and bandwidth visually and acoustically well. I'm totally excited and now wants to apply for the license.
Here are a few pictures links and videos of my projects and amateur researches. Please look to the last link to my basics with 6V6 tube! The basics for my EL84 transmitter.
Have fun
joe
My Arduino CW- decoder. Mic, line in and key.

tone- decoder is LM 567
NE555 tone generator for the key!
online calculator for LM567 here...
http://www.vk2zay.net/calculators/lm567.phpAttachment:
Tastentest.jpg
YT- Video / Decodeing from computersoftware
https://www.youtube.com/watch?v=5-pX87szdkcYT- Video / Decodeing from old russian receiver R311
https://www.youtube.com/watch?v=PIQmkfnSDaYCW- transmitter with EL84/ homebrew
Attachment:
CW_EL84.jpg
Check with websdr.org 350km!
Attachment:
websdr.jpg
USA Kit 1950th / Basics, please have a look!
http://www.wa8ywo.com/Ac1.html