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Sound Card Interfacing for RTTY, PSK31, and SSTV Who needs a
... The simplest and quickest computer to radio interface is to connect the Line Output from the Sound Card to the transceiver audio input with a 100:1 voltage divider to reduce the voltage output, and the Sound Card Line Input to the audio output of the radio. You can use the VOX to switch from Receive ...
... The simplest and quickest computer to radio interface is to connect the Line Output from the Sound Card to the transceiver audio input with a 100:1 voltage divider to reduce the voltage output, and the Sound Card Line Input to the audio output of the radio. You can use the VOX to switch from Receive ...
Series and Parallel Circuits: Comparing Various Parameters J0901
... Method:Using the Multimeter device, I measured the voltage of each individual resistor and the total voltage of both, series & parallel circuit. The values obtained from this measurement, were used to calculate the voltage, current, total resistance using Ohm#s Law and the individual & total power o ...
... Method:Using the Multimeter device, I measured the voltage of each individual resistor and the total voltage of both, series & parallel circuit. The values obtained from this measurement, were used to calculate the voltage, current, total resistance using Ohm#s Law and the individual & total power o ...
File
... Circuit – a complete path from the high to low potential which includes a load between the two potentials If there’s no load - only direct connection from high to low - then it’s called a short (circuit) – dangerous… If there’s a switch: open = no flow; closed = flow There are only “one way st ...
... Circuit – a complete path from the high to low potential which includes a load between the two potentials If there’s no load - only direct connection from high to low - then it’s called a short (circuit) – dangerous… If there’s a switch: open = no flow; closed = flow There are only “one way st ...
G4-Amateur-Radio-Practices
... horizontal and vertical channel amplifiers? A. An ohmmeter B. A signal generator C. An ammeter D. An oscilloscope ...
... horizontal and vertical channel amplifiers? A. An ohmmeter B. A signal generator C. An ammeter D. An oscilloscope ...
System Definition Document
... applications as electron multipliers. The detector MCPs have one face covered with a 40nm aluminium film, and micrometeoroid impacts plasmarise this film to seed the channel plate with electrons. The detector is projected to be sensitive to dust particles with masses between 2 x10-16g and 2 x10-18g. ...
... applications as electron multipliers. The detector MCPs have one face covered with a 40nm aluminium film, and micrometeoroid impacts plasmarise this film to seed the channel plate with electrons. The detector is projected to be sensitive to dust particles with masses between 2 x10-16g and 2 x10-18g. ...
Chapter 21
... The portal is an inductor, and the frequency is set to a condition with no metal present When metal is present, it changes the effective inductance, which changes the current The change in current is detected and an alarm ...
... The portal is an inductor, and the frequency is set to a condition with no metal present When metal is present, it changes the effective inductance, which changes the current The change in current is detected and an alarm ...
Crosstalk - WSU EECS
... reduces coupling capacitance and leaves the resistance unchanged. This slightly reduces the RC delay and significantly reduces coupling noise. Modern processes have six metal layers or more, with the lower layers being thin and optimized for tight routing pitch. The middle layers are often slightly ...
... reduces coupling capacitance and leaves the resistance unchanged. This slightly reduces the RC delay and significantly reduces coupling noise. Modern processes have six metal layers or more, with the lower layers being thin and optimized for tight routing pitch. The middle layers are often slightly ...
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.