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Chapter 5: Diodes
... 2. Construct the full-wave rectifier with a voltage signal at 1 kHz, 4 diodes, an audio transformer, and a load resistor of 100 kΩ. Use a signal generator with 2 V peak to peak output and connect it to transformer in step up fashion. Measure the amplitude of the signal after transformer and characte ...
... 2. Construct the full-wave rectifier with a voltage signal at 1 kHz, 4 diodes, an audio transformer, and a load resistor of 100 kΩ. Use a signal generator with 2 V peak to peak output and connect it to transformer in step up fashion. Measure the amplitude of the signal after transformer and characte ...
SUBELEMENT G4 AMATEUR RADIO PRACTICES [5 Exam
... G4A02 - What is one advantage of selecting the opposite or "reverse" sideband when receiving CW signals on a typical HF transceiver? A. Interference from impulse noise will be eliminated B. More stations can be accommodated within a given signal passband C. It may be possible to reduce or eliminate ...
... G4A02 - What is one advantage of selecting the opposite or "reverse" sideband when receiving CW signals on a typical HF transceiver? A. Interference from impulse noise will be eliminated B. More stations can be accommodated within a given signal passband C. It may be possible to reduce or eliminate ...
FR 1 - 6 HINTS.jnt
... Operating as designed above, the motor can lift a 0.012 kg mass a distance of 1.0 m in 60 s at constant velocity. Determine the efficiency of the motor. ...
... Operating as designed above, the motor can lift a 0.012 kg mass a distance of 1.0 m in 60 s at constant velocity. Determine the efficiency of the motor. ...
File
... Here is a circuit of capacitance beeper which uses a two-transistor flasher in conjunction with a Darlington transistor. When the probe is touched to a capacitor, the project beeps at a frequency that varies with capacitance. The frequency change is so noticeable that small capacitors can be precise ...
... Here is a circuit of capacitance beeper which uses a two-transistor flasher in conjunction with a Darlington transistor. When the probe is touched to a capacitor, the project beeps at a frequency that varies with capacitance. The frequency change is so noticeable that small capacitors can be precise ...
Electrical circuits wyklad 3
... To calculate the equivalent voltage source (Thevenin’s voltage ET ), we need to remove the load from the original circuit and calculate the voltage across the open connection points where the load resistor used to be. To calculate the equivalent series resistance (Thevenin’s resistance RT ) we need ...
... To calculate the equivalent voltage source (Thevenin’s voltage ET ), we need to remove the load from the original circuit and calculate the voltage across the open connection points where the load resistor used to be. To calculate the equivalent series resistance (Thevenin’s resistance RT ) we need ...
Review 6 unlike poles cause the magnets to attract. like poles cause
... 7. List things that affect capacitance? Area of the plates Distance between the plates Type of dielectric material used. 8. The symbol that indicate capacitance is ...
... 7. List things that affect capacitance? Area of the plates Distance between the plates Type of dielectric material used. 8. The symbol that indicate capacitance is ...
Chapter 21: Resonance
... The Quality Factor,Q • Q is often greater than 1 – Voltages across inductors and capacitors can be larger than source voltage IX V Qs ...
... The Quality Factor,Q • Q is often greater than 1 – Voltages across inductors and capacitors can be larger than source voltage IX V Qs ...
Very good – all requirements aptly met. Minor additions/corrections
... ground minimal. However, the high frequency circuit also consists of an inductor which should not have a ground plane beneath it. The plane will be cutout below the inductor. The circuit also utilizes two Schottkey diodes. These are not surface mounted and have a variable thermal resistance dependin ...
... ground minimal. However, the high frequency circuit also consists of an inductor which should not have a ground plane beneath it. The plane will be cutout below the inductor. The circuit also utilizes two Schottkey diodes. These are not surface mounted and have a variable thermal resistance dependin ...
Crystal radio
A crystal radio receiver, also called a crystal set or cat's whisker receiver, is a very simple radio receiver, popular in the early days of radio. It needs no other power source but that received solely from the power of radio waves received by a wire antenna. It gets its name from its most important component, known as a crystal detector, originally made from a piece of crystalline mineral such as galena. This component is now called a diode.Crystal radios are the simplest type of radio receiver and can be made with a few inexpensive parts, such as a wire for an antenna, a coil of copper wire for adjustment, a capacitor, a crystal detector, and earphones. They are distinct from ordinary radios as they are passive receivers, while other radios use a separate source of electric power such as a battery or the mains power to amplify the weak radio signal so as to make it louder. Thus, crystal sets produce rather weak sound and must be listened to with sensitive earphones, and can only receive stations within a limited range.The rectifying property of crystals was discovered in 1874 by Karl Ferdinand Braun, and crystal detectors were developed and applied to radio receivers in 1904 by Jagadish Chandra Bose, G. W. Pickard and others.Crystal radios were the first widely used type of radio receiver, and the main type used during the wireless telegraphy era. Sold and homemade by the millions, the inexpensive and reliable crystal radio was a major driving force in the introduction of radio to the public, contributing to the development of radio as an entertainment medium around 1920.After about 1920, crystal sets were superseded by the first amplifying receivers, which used vacuum tubes (Audions), and became obsolete for commercial use. They, however, continued to be built by hobbyists, youth groups, and the Boy Scouts as a way of learning about the technology of radio. Today they are still sold as educational devices, and there are groups of enthusiasts devoted to their construction who hold competitions comparing the performance of their home-built designs.Crystal radios receive amplitude modulated (AM) signals, and can be designed to receive almost any radio frequency band, but most receive the AM broadcast band. A few receive shortwave bands, but strong signals are required. The first crystal sets received wireless telegraphy signals broadcast by spark-gap transmitters at frequencies as low as 20 kHz.