I am starting to get serious about getting into RF and want to do it step by step because one of my dreams is to develop kits, tutorials, and projects for people (high schoolers that want to see if electronics is fun, college engineering students that want to gain hands on knowledge and skills, etc., etc.).
Because of this goal, I also want to do things in a way such that people without oscilloscopes or decent meters can work their way through the projects successfully.
This got me to wondering about how the early tinkerers (I'm not talking about the big players, but they interest me to) built things. For instance, you want to tune a tank circuit to 850kHz using a self-wound coil (and perhaps a handmade capacitor). How did you know the inductance of the coil? how did you know when the circuit was tuned to 850kHz? I realize that, in general, you designed things to be adjustable. But how did you go about adjusting it? How did you know that your oscillator was wiggling at 850kHz?
Today, of course, there are numerous ways to make these measurements, many of which involve test equipment that has become quite inexpensive. But, assuming you didn't have that, are there techniques that people used back in 1900 that a kid could use today?
Because of this goal, I also want to do things in a way such that people without oscilloscopes or decent meters can work their way through the projects successfully.
This got me to wondering about how the early tinkerers (I'm not talking about the big players, but they interest me to) built things. For instance, you want to tune a tank circuit to 850kHz using a self-wound coil (and perhaps a handmade capacitor). How did you know the inductance of the coil? how did you know when the circuit was tuned to 850kHz? I realize that, in general, you designed things to be adjustable. But how did you go about adjusting it? How did you know that your oscillator was wiggling at 850kHz?
Today, of course, there are numerous ways to make these measurements, many of which involve test equipment that has become quite inexpensive. But, assuming you didn't have that, are there techniques that people used back in 1900 that a kid could use today?