Quote:
Originally Posted by regenfreak
I guess the readings can be wrong with the inductor in parallel with the varactors and trimmers.
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Oh, yes, that will get you far wrong. Think of capacitors as negative inductors cancelling some of the susceptance of the inductors, and leaving you with a higher-Z part, a larger inductance.
You have to be able to flip between admittance and impedance, resistance and conductance as well as positive and negative values once you get this comfortably mastered, then diagrams get more animated.
There are many symmetries and equivalences which can save a lot of work.
If a capacitor does something, you can make a safe bet that an inductor does the exact opposite in all respects. And vice-versa. Memorise one, and get the other for free!
David.