@ burhanmz
I am not in any university or college. I felt this subject very interesting, i found myself very interested in it.That's why i started learning Electronics.And it is really interesting subject. And your points, what you told above, are really helping. Thanks a lot.And if you see above i have successfully designed my own colpitts Oscillator.in post#35, i have shown my oscillator.that is working at 1MHz.The Sine wave in my oscillator is not so well but i know what is the problem with it and can correct it.Now, i want to construct it.But i have stuck on INDUCTOR. i am reading the theory, that how an inductor react with A.C signal and let D.c go through itself without any problem. but i am still unable to construct one for my Oscillator.so can you help me understanding the way to construct an Inductor?
thanks