angtengchat,
Seeing how you could do calculations and your detailed explanation, I
regretted that I did not have a formal electrical-electronic education.
Self education is an alternative. That's how I got my initial training,
two home study courses. The second got me my FCC license and a job
in broadcasting. That was a good learning opportunity. A broadcaster
had to be jack of all trades and was seldom master of any of them.
Jim