Page 80 - RTH3BA Preview

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voltmeter using a multiplier resistance 130
Mathematics - AC circuits 589
angular velocity 600 Microphones 146
apparent power 603 Alexander Graham Bell 152
basic trigonometric functions 592 Antonio Meucci 152
cartesian coordinates 604 carbon microphone 146
degrees, radians and gradians 599 condensor (capacitor) microphone 149
determining height of a structure 594 crystal microphone 151
finding the instantaneous values of a dynamic microphone 147
sine wave 596 microphone amplification 152
how does an antenna tuner work 616 simple telephone 148
how does the calculator find sin 595 sound 146
performing calculations with complex
numbers 613 O
phase angle 608
Oscillators 295
power in a reactive circuit 603
A complete PLL system 317
purely capacitive circuit 602
a practical PLL 317
purely inductance circuit 602
Armstrong oscillator 297–298
purely resistive circuit 602
Armstrong oscillator - using a triode 301
Pythagoras 590
binary coded decimal 319
radians 597
buffer amplifier 297
real and imaginary number line 605
chirping 297
resistive and inductive circuit 607
Clapp oscillator 305
right angle triangle 589
Clapp oscillator using a P-channel JFET 305
right angle triangle trigonometry 589
Colpitts oscillator using a BJT 304
RLC circuits 601
counters/dividers 316
using a calculator 615
crystal Colpitts oscillator 311
Meters 126 developing a PLL 313
a quick way to work out sensitivity 132 direct digital synthesis 320
ammeter shunts 127 emitter stabilisation 298
ammeters 127 equivalent circuit of a quartz crystal 307
calculating a shunt 129 frequencies of a quartz crystal 306
digital multimeter (DMM) 135 gate leak bias 301
moving coil meter 126 grid and gate leak bias 302
multimeters 134 grid leak bias 301
multiplier 129 harmonic crystal oscillator 309
ohmmeters 133 Hartley oscillator 302
voltmeter 129 Hartley oscillator using a BJT 304
voltmeter resistance 131 Hartley oscillator using a triode 303
homodyne receiver 313
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