So I've set my mind on getting the (now optional) Morse certification along with my HAREC license as quite some European countries like France, Luxembourg and Spain still require this for a "full" license.
As I understand, you can bring your own Morse key of choice to the exam.
Straight keys are widely available on Evilbay, the electronic ones not so. So, of course, I am brewing my own.
What I understand from what Google coughs up, most of these designs have a potentiometer that sets the WPM dit/dah speed in the correct 1:3 duration. Some have a second pot to set the pause to a different WPM speed, which is neat for practicing.
Now, the the sequence for a J (· − − −) can never be followed by a
dit, as J can only progress into a "1" (· − − − −) or " ' " (· − − − − ·). Both follow that with a
dah. So do more recent designs take this into account and filter out an erroneous
dit? Does it even make sense to implement this kind of plausibilization? As morsing at higher speeds is pure muscle memory, and an automatic correction is hardly feasible, it seems kind superfluous. Of course I could administer an electric shock to the user for each error to "enhance" the learning experience