new push-pull tube amplifiers - Next-Tube
... 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 in Table 1 under the conditions of ...
... 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 in Table 1 under the conditions of ...
Health Physics Course 16.739 Instrumentation I
... These new design features create a gas amplification factor (>1) - called an “avalanche” By increasing the tube voltage the avalanche spreads along the anode wire Pulse size is proportional to the chamber voltage Pulse size depends on the electric field gradient Anode (central) diameter is important ...
... These new design features create a gas amplification factor (>1) - called an “avalanche” By increasing the tube voltage the avalanche spreads along the anode wire Pulse size is proportional to the chamber voltage Pulse size depends on the electric field gradient Anode (central) diameter is important ...
I www C?.
... l5 letter sign, adapted for -use as a unit of a letter signs now in use having incandescent composite illuminated sign, in which the lamps, are used with others to form a com ...
... l5 letter sign, adapted for -use as a unit of a letter signs now in use having incandescent composite illuminated sign, in which the lamps, are used with others to form a com ...
Anode
... X-ray Generator All voltage waveforms shown up to now are produced by a single-phase electrical power (standard form of power in the US) X-ray machine using this type power are called singlephase generators and they produce: Half-wave rectified = 60 pulses of x-rays/sec Full-wave rectified = 12 ...
... X-ray Generator All voltage waveforms shown up to now are produced by a single-phase electrical power (standard form of power in the US) X-ray machine using this type power are called singlephase generators and they produce: Half-wave rectified = 60 pulses of x-rays/sec Full-wave rectified = 12 ...
ENTC 4390
... X-ray production is most efficient (more x rays are produced per unit time) if the potential of the target is always positive and if the voltage between the filament and target is kept at its maximum value In most x-ray equipment, ac is converted to direct current (dc), and the voltage between filam ...
... X-ray production is most efficient (more x rays are produced per unit time) if the potential of the target is always positive and if the voltage between the filament and target is kept at its maximum value In most x-ray equipment, ac is converted to direct current (dc), and the voltage between filam ...
Manual - Musette Japan
... are working and hooked up correctly. If you think something is wrong with your Amp, play straight into the Amp with nothing else hooked up other than a Guitar. That way you make sure it is the Amp. If you own a combo unplug the internal speaker and hook up an external speaker cabinet to make sure it ...
... are working and hooked up correctly. If you think something is wrong with your Amp, play straight into the Amp with nothing else hooked up other than a Guitar. That way you make sure it is the Amp. If you own a combo unplug the internal speaker and hook up an external speaker cabinet to make sure it ...
The Mighty Midget
... O. H. Schade of RCA in 1938 entitled “Beam Power Tubes” that discusses the application of beam-power tubes in audio power amplifiers. (The article is available to download from my website www.pmillett.com). In this article, Mr. Schade discusses the application of local feedback in beam power tubes t ...
... O. H. Schade of RCA in 1938 entitled “Beam Power Tubes” that discusses the application of beam-power tubes in audio power amplifiers. (The article is available to download from my website www.pmillett.com). In this article, Mr. Schade discusses the application of local feedback in beam power tubes t ...
Calorimetry of Energy-Efficient Glow Discharge - Apparatus Design and Calibration
... calibration with resistive heaters, during operation at 10, 20, and 5 Torr respectively, and finally the calorimetry of the power supplies feeding 40 khz AC to the two tubes. These temperature differences, while generally precise to ~0.2 deg C are accurate to ~0.5 deg C. The differences in the vario ...
... calibration with resistive heaters, during operation at 10, 20, and 5 Torr respectively, and finally the calorimetry of the power supplies feeding 40 khz AC to the two tubes. These temperature differences, while generally precise to ~0.2 deg C are accurate to ~0.5 deg C. The differences in the vario ...
X-ray tube 2
... radiation output. If the melting is severe, the tungsten vaporizes and can plate the port. This can cause added filtering or interference with the flow of electrons. If the temperature of the anode increases to rapidly, the anode can crack and then become unstable in rotation. ...
... radiation output. If the melting is severe, the tungsten vaporizes and can plate the port. This can cause added filtering or interference with the flow of electrons. If the temperature of the anode increases to rapidly, the anode can crack and then become unstable in rotation. ...
5 cm x 5 cm Test Fixture Operation Manual
... • Pure oxygen may under certain conditions spontaneously ignite oxidisable materials such as certain metals and organics, and the subsequent reaction may proceed explosively. Thus, keep the fixture clean and free of foreign materials. Electrical shock Do not connect potentially dangerous high voltag ...
... • Pure oxygen may under certain conditions spontaneously ignite oxidisable materials such as certain metals and organics, and the subsequent reaction may proceed explosively. Thus, keep the fixture clean and free of foreign materials. Electrical shock Do not connect potentially dangerous high voltag ...
Loadlines Made Simpl..
... But wait, in this example circuit the (Va, Ia) combinations are always lying on the loadline, as we found out above. So, with a given grid voltage Vg=X, the (Va, Ia) point must be a) on the loadline, b) on the Vg=X line, so it must obviously be at the point where these two lines meet. For example Vg ...
... But wait, in this example circuit the (Va, Ia) combinations are always lying on the loadline, as we found out above. So, with a given grid voltage Vg=X, the (Va, Ia) point must be a) on the loadline, b) on the Vg=X line, so it must obviously be at the point where these two lines meet. For example Vg ...
Episode 103 - Teaching Advanced Physics
... Make a series circuit with all the (willing) students clasping hands, a 5 V d.c. power supply and the galvanometer, measuring the unfelt current around the complete loop. The current will depend on many factors including dryness of students' skin. Typically for a ring of ten students currents are ar ...
... Make a series circuit with all the (willing) students clasping hands, a 5 V d.c. power supply and the galvanometer, measuring the unfelt current around the complete loop. The current will depend on many factors including dryness of students' skin. Typically for a ring of ten students currents are ar ...
P3.8.1.2
... A tube diode consists of a hermetically sealed, evacuated glass bulb containing two electrodes: a thermionic cathode that emits electrons and an anode (see Fig. 1). If a suitable voltage is applied between the cathode and the anode, there will be an electric current between the two poles. The cathod ...
... A tube diode consists of a hermetically sealed, evacuated glass bulb containing two electrodes: a thermionic cathode that emits electrons and an anode (see Fig. 1). If a suitable voltage is applied between the cathode and the anode, there will be an electric current between the two poles. The cathod ...
The Transistor - labsanywhere.net
... Field Effect Transistor (FET) FETs are tiny switches that can open and close very quickly. A negative voltage will turn this pchannel transistor on. ‘On’ means there is a connection between the Source and Drain. ...
... Field Effect Transistor (FET) FETs are tiny switches that can open and close very quickly. A negative voltage will turn this pchannel transistor on. ‘On’ means there is a connection between the Source and Drain. ...
432 MHz GS35b Amp
... Having completed a 250 W PEP SSPA (utilizing 1 driving 4@ MRF646 transistors) the quest for more power on 432MHz began. In VK the regulations allow for 400W PEP as a maximum power level. I also wanted a QRO amplifier that I could use for EME after obtaining the necessary permits. My choices were to ...
... Having completed a 250 W PEP SSPA (utilizing 1 driving 4@ MRF646 transistors) the quest for more power on 432MHz began. In VK the regulations allow for 400W PEP as a maximum power level. I also wanted a QRO amplifier that I could use for EME after obtaining the necessary permits. My choices were to ...
Introduction to Geiger Counters
... The apparatus consists of two parts, the tube and the (counter + power supply). The Geiger-Mueller tube is usually cylindrical, with a wire down the center. The (counter + power supply) have voltage controls and timer options. A high voltage is established across the cylinder and the wire as shown i ...
... The apparatus consists of two parts, the tube and the (counter + power supply). The Geiger-Mueller tube is usually cylindrical, with a wire down the center. The (counter + power supply) have voltage controls and timer options. A high voltage is established across the cylinder and the wire as shown i ...
PDF version - Tube CAD Journal
... the biceps really necessary or even desirable? The pluses the 300B brings to a voltage regulator is its ability to pass a fair amount of current at low cathode-to-plate voltages, the result of having a low rp. And its 40 watt plate dissipation limit does not hurt either. An advantage few would highl ...
... the biceps really necessary or even desirable? The pluses the 300B brings to a voltage regulator is its ability to pass a fair amount of current at low cathode-to-plate voltages, the result of having a low rp. And its 40 watt plate dissipation limit does not hurt either. An advantage few would highl ...
Click here for X-Ray diffraction PPT
... When x-ray photons collide with electrons, some photons from the incident beam will be deflected away from the direction where they originally travel, much like billiard balls bouncing off one anther. If the wavelength of these scattered x-rays did not change (meaning that x-ray photons did not lose ...
... When x-ray photons collide with electrons, some photons from the incident beam will be deflected away from the direction where they originally travel, much like billiard balls bouncing off one anther. If the wavelength of these scattered x-rays did not change (meaning that x-ray photons did not lose ...
X-ray tube - El Camino College
... Computed Radiography is an indirect type of imaging system. The receptor used within a CR cassette is called a photostimulable imaging plate (PSP) and it absorbs the radiation exiting the patient. The exposed plate is processed in a CR reader, where the absorbed energy is extracted. The information ...
... Computed Radiography is an indirect type of imaging system. The receptor used within a CR cassette is called a photostimulable imaging plate (PSP) and it absorbs the radiation exiting the patient. The exposed plate is processed in a CR reader, where the absorbed energy is extracted. The information ...
Owners Manual - Frenzel Tube Amps
... Unique NNFB "Edge" switch on the PRESENCE control that transforms the power amp section into a NoNegative-Feedback style amp for more open, less compressed tones. Post output transformer LINE OUT with LINE OUT LEVEL control for driving a higher power amp, or for using this amp as a tube preamp/overd ...
... Unique NNFB "Edge" switch on the PRESENCE control that transforms the power amp section into a NoNegative-Feedback style amp for more open, less compressed tones. Post output transformer LINE OUT with LINE OUT LEVEL control for driving a higher power amp, or for using this amp as a tube preamp/overd ...
HF Power Amplifiers featuring the Heath SB-220
... All amplifiers designed to work into a 50 ohm impedance as presented by a correctly matched 50 ohm coaxial line / antenna system. ...
... All amplifiers designed to work into a 50 ohm impedance as presented by a correctly matched 50 ohm coaxial line / antenna system. ...
Critical Potentials - Brown University Wiki
... 1. Use the fine voltage control knob on the 60V power supply to slowly increase the accelerating potential. Starting @ 4V, record the current and voltage in 0.2V intervals. At least one current minimum should be observed before 12V. 2. Making use of both the coarse and fine adjustment knobs, scan la ...
... 1. Use the fine voltage control knob on the 60V power supply to slowly increase the accelerating potential. Starting @ 4V, record the current and voltage in 0.2V intervals. At least one current minimum should be observed before 12V. 2. Making use of both the coarse and fine adjustment knobs, scan la ...
Build a RAT Tube Tester
... Back to Uncle Ned's Mailbag rec.audio.tubes tube tester project, by Steve Bench Click here for updated Schematic Click on here for a variable voltage filament supply to accomodate odd voltage power triodes (2A3, 300B, 50, etc.) Background: There are 3 fundamental Vacuum Tube (Valve) constants. These ...
... Back to Uncle Ned's Mailbag rec.audio.tubes tube tester project, by Steve Bench Click here for updated Schematic Click on here for a variable voltage filament supply to accomodate odd voltage power triodes (2A3, 300B, 50, etc.) Background: There are 3 fundamental Vacuum Tube (Valve) constants. These ...
The LW6-180 Amplifier
... output-tube screen grid has a full load dissipation of about 2.2W against the 7W design-maximum rating of the 6LW6 (Fig. 2). ...
... output-tube screen grid has a full load dissipation of about 2.2W against the 7W design-maximum rating of the 6LW6 (Fig. 2). ...
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.