I do not have an oscilloscope, and I "always" wanted one. "So I could debug & understand & see what was going on".
Yesterday I got so frustrated that my cheap RF still was not 100% rock solid - even though I had made all sorts of initializing strings.
i got so desperate that I decided to buy a used oscilloscope. While checking out what was on sale in my area, I got the idea that perhaps I could make one myself..
That got me to look into .. "perhaps someone out there made a SW oscilloscope - how hard could that be?