c50_bias.pdf
... as the Peavy Classic 50 there is no provision for adjusting the bias. The factory setting for this amp seems to work fairly well for Sovtek EL84's, but you may run into problems using other tubes, such as the Tesla/GT EL84's. This article will explain how to add a multi-turn cermet pot to the output ...
... as the Peavy Classic 50 there is no provision for adjusting the bias. The factory setting for this amp seems to work fairly well for Sovtek EL84's, but you may run into problems using other tubes, such as the Tesla/GT EL84's. This article will explain how to add a multi-turn cermet pot to the output ...
Electronic Ballast Fundamentals
... When the lamps is off the tube is non conductive The tube must be excited or started by a high voltage After the lamps is started the lamp voltage drops A current limiting “ballast” is needed in between the power source and the lamp ...
... When the lamps is off the tube is non conductive The tube must be excited or started by a high voltage After the lamps is started the lamp voltage drops A current limiting “ballast” is needed in between the power source and the lamp ...
Nereus, A 250 kV, 80 kA Electron Beam Generator
... capacitance of the diode and its base. the transmission line voltaqe (prepulse voltaoe) is across the 0.25 cm anode-cathode qap and the mean electric field in the gap is 260 kV/cm for 500 kV In this case electron emission will occur from charge. about l/16 of the cathode area and the diode will shor ...
... capacitance of the diode and its base. the transmission line voltaqe (prepulse voltaoe) is across the 0.25 cm anode-cathode qap and the mean electric field in the gap is 260 kV/cm for 500 kV In this case electron emission will occur from charge. about l/16 of the cathode area and the diode will shor ...
Vacuum nanoelectronics: Back to the future?—Gate
... nanoscale vacuum tubes can provide high frequency/power output while satisfying the metrics of lightness, cost, lifetime, and stability at harsh conditions, and the operation voltage can be C 2012 American Institute of Physics. decreased comparable to the modern semiconductor devices. V [http://dx.d ...
... nanoscale vacuum tubes can provide high frequency/power output while satisfying the metrics of lightness, cost, lifetime, and stability at harsh conditions, and the operation voltage can be C 2012 American Institute of Physics. decreased comparable to the modern semiconductor devices. V [http://dx.d ...
Experimental mercury ARC rectifier.
... voltage on the control ring of the mercury arc tube causing it to conduct, Once started, conduction through the mercury arc tube continues during the remainder of the positive half cycle of anode voltage. ...
... voltage on the control ring of the mercury arc tube causing it to conduct, Once started, conduction through the mercury arc tube continues during the remainder of the positive half cycle of anode voltage. ...
SMU-DDE-Assignments-Scheme of Evaluation PROGRAM Bachelor
... waveform reaches the output. This rectification requires a single diode in a single-phase supply. Rectifiers provide a unidirectional, but a pulsating DC. However, as compared to full-wave rectifiers, half-wave rectifiers create extreme ripple and much more filtering is required to remove harmon ...
... waveform reaches the output. This rectification requires a single diode in a single-phase supply. Rectifiers provide a unidirectional, but a pulsating DC. However, as compared to full-wave rectifiers, half-wave rectifiers create extreme ripple and much more filtering is required to remove harmon ...
rectification - El Camino College
... • process of changing AC to pulsed DC • rectifier – device that allows I to flow in only one direction – types valve tube solid state ...
... • process of changing AC to pulsed DC • rectifier – device that allows I to flow in only one direction – types valve tube solid state ...
Cathode ray oscilloscope
... oscilloscopes this is coated with zinc sulphide, which emits a blue glow when electrons collide with it, while there are other coatings that glow for some seconds after the beam has passed so enabling transient events to be seen more clearly; (g) a graphite coating to shield the beam from external e ...
... oscilloscopes this is coated with zinc sulphide, which emits a blue glow when electrons collide with it, while there are other coatings that glow for some seconds after the beam has passed so enabling transient events to be seen more clearly; (g) a graphite coating to shield the beam from external e ...
Heathkit SB-200 - Orange County (California) Amateur Radio Club
... 125 µF 450 volt capacitors in series. Each capacitor is shunted by a 30KΩ 7-watt bleeder resistor. The capacitor closest to ground potential has an additional 700Ω resistor in series with its bleeder resistor. The 10 volts that is tapped off at this point is used to set the ALC threshold. The negati ...
... 125 µF 450 volt capacitors in series. Each capacitor is shunted by a 30KΩ 7-watt bleeder resistor. The capacitor closest to ground potential has an additional 700Ω resistor in series with its bleeder resistor. The 10 volts that is tapped off at this point is used to set the ALC threshold. The negati ...
E2V Technologies CX1725A, CX1725AX Air Cooled, Hollow Anode
... pressure until the thyratron will no longer reliably hold off the required anode voltage, and then reducing it again only until the tube will operate reliably without spontaneous anode voltage breakdowns. The gas pressure of E2V Technologies metal envelope thyratrons is normally set during manufactu ...
... pressure until the thyratron will no longer reliably hold off the required anode voltage, and then reducing it again only until the tube will operate reliably without spontaneous anode voltage breakdowns. The gas pressure of E2V Technologies metal envelope thyratrons is normally set during manufactu ...
EL DIABLO 60 Owners Manual
... this may cause some unwanted feedback or squeal from the preamp tubes becoming micro-phonic. 15. TUBE CONTOUR CONTROL – This is a unique circuit to the EL DIABLO design. This Contour control adds an additional “tone stack” within the tube preamp, which interacts with and changes the loading of the t ...
... this may cause some unwanted feedback or squeal from the preamp tubes becoming micro-phonic. 15. TUBE CONTOUR CONTROL – This is a unique circuit to the EL DIABLO design. This Contour control adds an additional “tone stack” within the tube preamp, which interacts with and changes the loading of the t ...
Svetlana 4CX1500A
... Electrical Application Filament operation The rated filament voltage for the 4CX1500A is 5.0 volts. Filament voltage, as measured at the socket, should be maintained within ±5% of this value to obtain maximum tube life. Grid operation The rated dissipation of the grid is 25 watts. This is approximat ...
... Electrical Application Filament operation The rated filament voltage for the 4CX1500A is 5.0 volts. Filament voltage, as measured at the socket, should be maintained within ±5% of this value to obtain maximum tube life. Grid operation The rated dissipation of the grid is 25 watts. This is approximat ...
X-ray tube with needle
... chamber to eUa energy (where Ua is the anode voltage), and finally are injected into the region without electric field i.e. into the drift chamber. Within the drift chamber they continue to move along trajectories established during acceleration process. Correct acceleration process guarantees that ...
... chamber to eUa energy (where Ua is the anode voltage), and finally are injected into the region without electric field i.e. into the drift chamber. Within the drift chamber they continue to move along trajectories established during acceleration process. Correct acceleration process guarantees that ...
Rate effects in a proportional counter with resistive cathode
... these effects it was decided to use the classical proportional counter geometry, with a cylindrical glass tube as the cathode, rather than parallel plate devices. Indeed, the generality of the information obtained is not affected and the cylindrical proportional counter geometry has several advantag ...
... these effects it was decided to use the classical proportional counter geometry, with a cylindrical glass tube as the cathode, rather than parallel plate devices. Indeed, the generality of the information obtained is not affected and the cylindrical proportional counter geometry has several advantag ...
step up transformer
... the ANODE side of the tube OR • 110 volts to 110,000 volts • Decreases the CURRENT going to the CATHODE side of the tube • 5 Amps to 50 milliamps ...
... the ANODE side of the tube OR • 110 volts to 110,000 volts • Decreases the CURRENT going to the CATHODE side of the tube • 5 Amps to 50 milliamps ...
Gt So50 Package
... High, the switch is located directly next to the input. The S50’s power section design is a high voltage Class A/B design, typical of those classic 60’s amps we all know and love. However, the S50R adds the unique feature of being able to operate with virtually any common power tube such as the 6L6, ...
... High, the switch is located directly next to the input. The S50’s power section design is a high voltage Class A/B design, typical of those classic 60’s amps we all know and love. However, the S50R adds the unique feature of being able to operate with virtually any common power tube such as the 6L6, ...
New Push-Pull Tube Amplifiers
... defined and discussed at length. From these publications I now abstract only three fundamental issues: output power, pentodes versus tetrodes, and the damping factor. First, consider the available output power per amplifier circuit. I calculated and measured these powers, and the results are shown i ...
... defined and discussed at length. From these publications I now abstract only three fundamental issues: output power, pentodes versus tetrodes, and the damping factor. First, consider the available output power per amplifier circuit. I calculated and measured these powers, and the results are shown i ...
TransTube®
... The uncertainty re: U.S. tube manufacturers and the fact that tubes themselves were becoming poorer in quality and much higher in price led me to conclude that we needed to began a major research project to figure out how to make solid-state devices perform, sound, and “feel” like tubes. Hopefully, ...
... The uncertainty re: U.S. tube manufacturers and the fact that tubes themselves were becoming poorer in quality and much higher in price led me to conclude that we needed to began a major research project to figure out how to make solid-state devices perform, sound, and “feel” like tubes. Hopefully, ...
14 Lighting Concepts 2
... • Consumes (Wastes) 12% and 15% of input • Being replaced with electronic ballasts ...
... • Consumes (Wastes) 12% and 15% of input • Being replaced with electronic ballasts ...
Sediment sampling
... SDI Specialty Devices USA developed a Vibecore-D for sediment sampling. The Vibrecore has recently also become available in Europe. Aquifer Consultancy obtained a distribution agreement. The vibrecore is a handy device and can be easily operated from a small workboat. With a high vibration frequency ...
... SDI Specialty Devices USA developed a Vibecore-D for sediment sampling. The Vibrecore has recently also become available in Europe. Aquifer Consultancy obtained a distribution agreement. The vibrecore is a handy device and can be easily operated from a small workboat. With a high vibration frequency ...
Electron Guns
... Very chemically reactive when hot (forms compounds with all elements except C – poisons cathode Requires exceptionally good vacuum (10-7 torr or better) Expensive Ew depends on crystal orientation As crystallites evaporate, emission can change ...
... Very chemically reactive when hot (forms compounds with all elements except C – poisons cathode Requires exceptionally good vacuum (10-7 torr or better) Expensive Ew depends on crystal orientation As crystallites evaporate, emission can change ...
Notes on Rebuilding an SB
... and the power cord entry. The cord and voltage-select jumpers have not yet been installed. For the final endurance change, we added a step-start circuit which limited the turn-on or inrush current due to the initial low resistance of the tube filaments and the high energy demanded by the filter cap ...
... and the power cord entry. The cord and voltage-select jumpers have not yet been installed. For the final endurance change, we added a step-start circuit which limited the turn-on or inrush current due to the initial low resistance of the tube filaments and the high energy demanded by the filter cap ...
Teledyne Semiconductor Fetron
... higher harmonics, a result of i t s threehalves response relationship. The FETRON , however, is close to being a perfect square law device over most of i t s usable range, and generates almost no harmonics above the second. The FETRON must also be tailored for pentode operating conditions, but less ...
... higher harmonics, a result of i t s threehalves response relationship. The FETRON , however, is close to being a perfect square law device over most of i t s usable range, and generates almost no harmonics above the second. The FETRON must also be tailored for pentode operating conditions, but less ...
Vacuum tube
In electronics, vacuum tube, electron tube, tube (in North America), or valve (in Britain and some other regions) is a device that controls electric current between electrodes in an evacuated container.Vacuum tubes mostly rely on thermionic emission of electrons from a hot filament or a cathode heated by the filament. This type is called a thermionic tube or thermionic valve. A phototube, however, achieves electron emission through the photoelectric effect. Not all valves/electron tubes are evacuated ""vacuum tubes""; gas-filled tubes are similar devices containing a gas, typically at low pressure, which exploit phenomena related to electric discharge in gases, usually without a heater.The simplest vacuum tube, the diode, contains only a heater, a heated electron-emitting cathode (the filament itself acts as the cathode in some diodes), and a plate (anode). Current can only flow in one direction through the device between the two electrodes, as electrons emitted by the cathode travel through the tube and are collected by the anode. Adding one or more control grids within the tube allows the current between the cathode and anode to be controlled by the voltage on the grid or grids. Tubes with grids can be used for many purposes, including amplification, rectification, switching, oscillation, and display.Invented in 1904 by John Ambrose Fleming, vacuum tubes were a basic component for electronics throughout the first half of the twentieth century, which saw the diffusion of radio, television, radar, sound reinforcement, sound recording and reproduction, large telephone networks, analog and digital computers, and industrial process control. Although some applications had counterparts using earlier technologies such as the spark gap transmitter or mechanical computers, it was the invention of the vacuum tube that made these technologies widespread and practical.In the 1940s the invention of semiconductor devices made it possible to produce solid-state devices, which are smaller, more efficient, more reliable, more durable, and cheaper than tubes.Hence, from the mid-1950s solid-state devices such as transistors gradually replaced tubes. The cathode-ray tube (CRT) remained the basis for televisions and video monitors until superseded in the 21st century. However, there are still a few applications for which tubes are preferred to semiconductors; for example, the magnetron used in microwave ovens, and certain high frequency amplifiers.