![SUBELEMENT T4 -Radio and electronic fundamentals](http://s1.studyres.com/store/data/008444626_1-54830bcd4bdf3ecdd34b01b6c61816e0-300x300.png)
Sinusoidal Steady
... source voltage divides between the resistor and capacitor. The output voltage is thus smaller than the source voltage. 3) Infinite frequency w=∞: The impedance of the capacitor is zero, and the capacitor acts as a short circuit. vo=0. Based on the above analysis, the series RC circuit functions as a ...
... source voltage divides between the resistor and capacitor. The output voltage is thus smaller than the source voltage. 3) Infinite frequency w=∞: The impedance of the capacitor is zero, and the capacitor acts as a short circuit. vo=0. Based on the above analysis, the series RC circuit functions as a ...
Circuits PPT 2 - Batesville Community School
... Sum of the individual voltages = source voltage Current is the same in all parts of a series circuit. If one “goes out”, they all “go out” ...
... Sum of the individual voltages = source voltage Current is the same in all parts of a series circuit. If one “goes out”, they all “go out” ...
500 WATT PA by Harry Lythall
... uses four PL519 TV line output valves in a very simple circuit that will deliver over 450 watts at 3.5 MHz (350 watts at 30 MHz). PL519 (40KG6A) is a more robust replacement for the earlier PL509 (40KG6) tube. Both valves will work well in this circuit. The input drive power is about 50 - 100 watts ...
... uses four PL519 TV line output valves in a very simple circuit that will deliver over 450 watts at 3.5 MHz (350 watts at 30 MHz). PL519 (40KG6A) is a more robust replacement for the earlier PL509 (40KG6) tube. Both valves will work well in this circuit. The input drive power is about 50 - 100 watts ...
RLC circuits
... The AC analysis of circuits with inductors is also easy, with the effective resistance (impedance) of an inductor equal to iL. From a phasor point of view this means that the inductor leads the resistor by 90 degrees. High pass and low pass filters can be made from inductors as well. However the in ...
... The AC analysis of circuits with inductors is also easy, with the effective resistance (impedance) of an inductor equal to iL. From a phasor point of view this means that the inductor leads the resistor by 90 degrees. High pass and low pass filters can be made from inductors as well. However the in ...
Basic concepts and laws of electronics
... The analysis and design of AM radios (and communication systems in general) is usually conducted in the frequency domain using Fourier analysis, which allows us to represent signals as combinations of sinusoids (sines and cosines). ...
... The analysis and design of AM radios (and communication systems in general) is usually conducted in the frequency domain using Fourier analysis, which allows us to represent signals as combinations of sinusoids (sines and cosines). ...
Measurement of leakage magnetic field of a transformer
... Measurement of the magnetic field strength of the leakage magnetic field Measurement of the leakage magnetic field of transformer will be performed using arrangement according to Fig. 4. The transformer is fed by voltage at power line frequency 50 Hz. Both the x and y axes pass through the center of ...
... Measurement of the magnetic field strength of the leakage magnetic field Measurement of the leakage magnetic field of transformer will be performed using arrangement according to Fig. 4. The transformer is fed by voltage at power line frequency 50 Hz. Both the x and y axes pass through the center of ...
chapter3
... 14.350) bands, both traps (identical LC resonance circuits) must be tuned for 15m band. If any signal (TX or RX) reaches within 15m band both traps are resonating and acting as high impedance. Then the active part of the antenna is limited to “AB” portion; for 20m bad signals both traps having very ...
... 14.350) bands, both traps (identical LC resonance circuits) must be tuned for 15m band. If any signal (TX or RX) reaches within 15m band both traps are resonating and acting as high impedance. Then the active part of the antenna is limited to “AB” portion; for 20m bad signals both traps having very ...
V - Social Circle City Schools
... Find each sum or difference. Identify whether each sum or difference is wholly real or wholly imaginary, or if it has both a real and an imaginary part. 1. (12 + i) + (–4 – i) 2. (8 + 2i) – (–8 + 8i) 3. (2 + 25i) – (17 + 24i) 4. (–18 + 3i) + (18 – 9i) 5. (10 + i53) + (–23 + i) 6. (30 – 24i) – (–6 + ...
... Find each sum or difference. Identify whether each sum or difference is wholly real or wholly imaginary, or if it has both a real and an imaginary part. 1. (12 + i) + (–4 – i) 2. (8 + 2i) – (–8 + 8i) 3. (2 + 25i) – (17 + 24i) 4. (–18 + 3i) + (18 – 9i) 5. (10 + i53) + (–23 + i) 6. (30 – 24i) – (–6 + ...
DGES Amateur Radio Club Communications Field Day # 2
... but all contain at least two electrical conductors separated by a dielectric (insulator); for example, one common construction consists of metal foils separated by a thin layer of insulating film. Capacitors are widely used as parts of electrical circuits in many common electrical devices. ...
... but all contain at least two electrical conductors separated by a dielectric (insulator); for example, one common construction consists of metal foils separated by a thin layer of insulating film. Capacitors are widely used as parts of electrical circuits in many common electrical devices. ...
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.