How to compute base biasing resistor for class C amplifier

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Your is another PITA information free post.

Or is that an exam question ??

..... Phil

All the questions you've been posting could be answered by getting a copy of this book:

And you get can even more value out of it by spotting all the errors! :)

Still very instructional, though, seriously.

Just buy Steve Cripps' book and be done with it.

RF Power Amplifiers for Wireless Communications

Your bad this time dude, he said BASE biasing.

In class C the base bias will be reverse. How much reverse determines the d uty cycle. That determines most of the rest. You are basically pulsing a tu ned circuit, there is not much other reason to use class C. It is the most efficient but there are many things it cannot do.

There is a copy of Bowick's book in our office library. Unfortunately, his class C amplifier circuit diagram is peculiar. It works only on LTSpice, not HSpice or Ngspice.

I have PDF copy of his book that I downloaded a few years ago. But like a number of other authors, it suffers from too mucj text the design examples are bare bones and the reader has to a lot of calculations himself to determine the sequence of calculation steps used to arrive at an answer.

duty cycle. That determines most of the rest. You are basically pulsing a tuned circuit, there is not much other reason to use class C. It is the mos t efficient but there are many things it cannot do.

Thank you very much for the clarification.

F*ck all that. Hook up your circuit with a bipolar and couple capacitively to the base but with like a 20 meg pot to ground.

When you find your operating point just shut it down, take an ohmmeter to the pot where you set is an use that value.

Yeah, that is cowboy engineering but it works.