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HANDS ON RADIO EXPERIMENT 43 RF OSCILLATORS, PART 1 IN EXPERIMENT 17 ON THE
PHASE SHIFT OSCILLATOR WE EXPLORED THE IDEA OF USING PHASE SHIFT AND
FEEDBACK TO TURN AN AMPLIFIER INTO A SELF SUSTAINING OSCILLATOR.  ITS NOT A
BAD IDEA TO GO BACK AND SKIM THAT COLUMN.  THIS MONTH WE TURN PRO AND MOVE
HIGHER IN FREQUENCY TO THE WORLD OF RF OSCILLATORS.  IN A SENSE, THIS IS
THE FUNDAMENTAL BUILDING BLOCK OF RADIO WITHOUT AN OSCILLATOR THERE WOULD
BE NO SIGNALS TO AMPLIFY OR RECEIVE.  ALONG WITH LEARNING ABOUT
OSCILLATORS, YOULL LEARN ABOUT A NEW WAY TO BUILD RF CIRCUITS.  THIS IS A
TWO PART EXPERIMENT IN THIS INSTALLMENT WELL DISCUSS HOW RF OSCILLATORS
WORK.  NEXT MONTH WELL BUILD AND TEST ONE.  TERMS TO LEARN BARKHAUSEN
CRITERION FOR AN OSCILLATOR TO OSCILLATE, THE PRODUCT OF GAIN AROUND THE
FEEDBACK LOOP MUST BE EQUAL TO OR GREATER THAN UNITY 1.  LOOP GAIN THE
AMOUNT OF TOTAL GAIN MEASURED ALL THE WAY AROUND A FEEDBACK LOOP.  THE
OSCILLATOR A REVIEW AN OSCILLATOR CONSISTS OF A MEANS OF AMPLIFICATION A
TRANSISTOR, INTEGRATED CIRCUIT OR VACUUM TUBE AND A FEEDBACK NETWORK.  THE
FEEDBACK NETWORK SHOWN AS AN LC RESONATOR IN FIGURE 1 IS DESIGNED SO THAT
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JH2FXK/339 JH2RMU/340 JH3AEF/342 JH4GNE/339 JH6IMI/ 338 JH7QXL/ 340
JH8CFZ/339 JH8GWW/343 JH8NBJ/340 JJ2LPV/339 JL1XMN/ 340 JM1GYQ/ 339
JN1VNW/339 JR1WCT/344 JR9LKE/335 K0BS/358 K0FF/348 K0GSV/355 K0GT/343
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