UNPACKING INSTRUCTIONS
... amplifier on a firm, level surface and carefully inspect it for shipping damage. Contact the shipper immediately if any damage exists. Do not discard the carton or packing material. 2. Remove the twelve screws holding the cover on with a number 2 phillips screwdriver. Carefully lift the cover off th ...
... amplifier on a firm, level surface and carefully inspect it for shipping damage. Contact the shipper immediately if any damage exists. Do not discard the carton or packing material. 2. Remove the twelve screws holding the cover on with a number 2 phillips screwdriver. Carefully lift the cover off th ...
applications of cathode ray tubes i
... study of alternating electric potentials. In comparison with mechanical oscillographs, such as the loop oscillograph, the cathode ray tube has the advantage that the beam of(~lectrons has practically no inertia, and that therefore very high frequencies and phenomena of very short duration can be mad ...
... study of alternating electric potentials. In comparison with mechanical oscillographs, such as the loop oscillograph, the cathode ray tube has the advantage that the beam of(~lectrons has practically no inertia, and that therefore very high frequencies and phenomena of very short duration can be mad ...
Cutoff Variations Due to Barium Evaporation
... cathodes. Although oxide cathodes have a low work function (~1 .5 eV), they are not suitable for high current density (10 A/cm2), high-brightness applications due to the relatively high resistivity of the coating (giving rise to a voltage drop and Joule heating at high current density). (11 Dispense ...
... cathodes. Although oxide cathodes have a low work function (~1 .5 eV), they are not suitable for high current density (10 A/cm2), high-brightness applications due to the relatively high resistivity of the coating (giving rise to a voltage drop and Joule heating at high current density). (11 Dispense ...
Trigger Circuits
... 3. Trigger with doubling of anode voltage (V0) This simple circuit facilitates the triggerability of flashtubes with high Xenon-fillpressure considerably. When firing T, the discharge of Cz produces in the trigger coil the usual trigger events. Simultaneously also Cinv is discharged bringing down th ...
... 3. Trigger with doubling of anode voltage (V0) This simple circuit facilitates the triggerability of flashtubes with high Xenon-fillpressure considerably. When firing T, the discharge of Cz produces in the trigger coil the usual trigger events. Simultaneously also Cinv is discharged bringing down th ...
Jolida 302b Upgrade
... work very slowly through this process and spend about 3 hours to complete these modifications. For ease of understanding, I colorcoded the parts I recommend replacing. These same parts for the Jolida 502 are certainly present in the 302, but the values for some/all of these may be different. I only ...
... work very slowly through this process and spend about 3 hours to complete these modifications. For ease of understanding, I colorcoded the parts I recommend replacing. These same parts for the Jolida 502 are certainly present in the 302, but the values for some/all of these may be different. I only ...
Radio-frequency power generation
... The physics of the energy exchange between the electron bunches and the RF power means that the size of the space in which the exchange takes place must be small compared with the distance an electron moves in one RF cycle. Thus, the size of an amplifier decreases with decreasing d.c. voltage and wi ...
... The physics of the energy exchange between the electron bunches and the RF power means that the size of the space in which the exchange takes place must be small compared with the distance an electron moves in one RF cycle. Thus, the size of an amplifier decreases with decreasing d.c. voltage and wi ...
d) 16 anodes and 32 common cathodes
... Ohms Law R = E/I = 5.4V/240mA = 22.5 ohm or ~22 ohm Ideally the sum of the voltage drops of parts 1-3 is relatively small and the LED current can be constant, controlled primarily with the resistors and the brightness will not vary. Two ULN2803s can be used with two additional ULN 2803 drivers each ...
... Ohms Law R = E/I = 5.4V/240mA = 22.5 ohm or ~22 ohm Ideally the sum of the voltage drops of parts 1-3 is relatively small and the LED current can be constant, controlled primarily with the resistors and the brightness will not vary. Two ULN2803s can be used with two additional ULN 2803 drivers each ...
Owner`s Manual - Audio Research
... Research dealer or other qualified technician. The vacuum tubes inside your Reference 5 SE are quality tubes and with normal use should not need to be changed for approximately 4,000 hours of use. Replacement tubes should be of equivalent quality and are available from Audio Research. Note that tube ...
... Research dealer or other qualified technician. The vacuum tubes inside your Reference 5 SE are quality tubes and with normal use should not need to be changed for approximately 4,000 hours of use. Replacement tubes should be of equivalent quality and are available from Audio Research. Note that tube ...
NL37248 - RELL Tubes
... Ignitrons are robust high current switching devices. The current ratings may be exceeded to some extent without destroying the ignitron but with the consequence of reduced life. IGNITOR The ignitor is a small rod of semiconducting material with a pointed end that is partially immersed into the catho ...
... Ignitrons are robust high current switching devices. The current ratings may be exceeded to some extent without destroying the ignitron but with the consequence of reduced life. IGNITOR The ignitor is a small rod of semiconducting material with a pointed end that is partially immersed into the catho ...
Product Data Sheets (Quartz)
... The control aspects of infra-red heating are essential to the quality and repeatability of the infra-red process. Accordingly we have developed an option to provide the basis for closed loop temperature control. This utilises a fast response mineral insulated thermocouple which senses the temperatur ...
... The control aspects of infra-red heating are essential to the quality and repeatability of the infra-red process. Accordingly we have developed an option to provide the basis for closed loop temperature control. This utilises a fast response mineral insulated thermocouple which senses the temperatur ...
High-Brightness, High-Current-Density Cathode for Induction Linac
... 106 kV and the space charge limited current 436 A. The images of the individual holes are well separated, and there is no apparent elongation in the radial direction from energy variations since the camera gate pulse is short (5 ns) and timed to OCCUT at peak voltage, where variation in beam energy ...
... 106 kV and the space charge limited current 436 A. The images of the individual holes are well separated, and there is no apparent elongation in the radial direction from energy variations since the camera gate pulse is short (5 ns) and timed to OCCUT at peak voltage, where variation in beam energy ...
ST-70 Base Line Testing
... A much bigger compromise -- in my opinion -- is the use of a single rectifier tube to support a 70 watt amplifier. Competitors with competing products from the likes of Altec, Fisher, and Pilot all used dual rectifier tubes in their products of similar power levels. As a result, there is no doubt th ...
... A much bigger compromise -- in my opinion -- is the use of a single rectifier tube to support a 70 watt amplifier. Competitors with competing products from the likes of Altec, Fisher, and Pilot all used dual rectifier tubes in their products of similar power levels. As a result, there is no doubt th ...
Tranny Specs 01.PDF
... sure it is below 200ma, proportionately lower depending on what safety factor you want to use. The operating point and service class of the amp's power section will give an idea how much the current needs of the power tubes will increase from idle conditions to full power output. This looks like a H ...
... sure it is below 200ma, proportionately lower depending on what safety factor you want to use. The operating point and service class of the amp's power section will give an idea how much the current needs of the power tubes will increase from idle conditions to full power output. This looks like a H ...
Vacuum Tube amplifier
... 20Hz-100KHz down <1dB at ends 18.3dB 500Hz-100KHz down 3dB @ 92Hz -1.2dB, 20Hz-100KHz down <1dB at ends -0.5dB, 90Hz-100KHz down 3dB @ 20Hz ...
... 20Hz-100KHz down <1dB at ends 18.3dB 500Hz-100KHz down 3dB @ 92Hz -1.2dB, 20Hz-100KHz down <1dB at ends -0.5dB, 90Hz-100KHz down 3dB @ 20Hz ...
MPGDMSGCRev5
... glass substrate isolates the anode and the cathode, however the high resistivity surface of the glass substrate causes a charge-up problem. Although the small-gap MSGC can solve this problem, it cannot operate at high gas gain since the anode and the cathode are too close in this geometry and the su ...
... glass substrate isolates the anode and the cathode, however the high resistivity surface of the glass substrate causes a charge-up problem. Although the small-gap MSGC can solve this problem, it cannot operate at high gas gain since the anode and the cathode are too close in this geometry and the su ...
DIY Tube Stereo 70 Board - TubeZone V 1.0 -Instructions
... This is a modified version of the usual disclaimer/warning that comes with most transmitting equipment and parts. Since similar conditions exist in all tube audio amplifiers we believe it be appropriate here. Please note prior to beginning construction that there are high(over 400 volts) DC and AC v ...
... This is a modified version of the usual disclaimer/warning that comes with most transmitting equipment and parts. Since similar conditions exist in all tube audio amplifiers we believe it be appropriate here. Please note prior to beginning construction that there are high(over 400 volts) DC and AC v ...
SB-200 Restoration and ModificationsWA3DSP
... can select for fan speed. One selects the standby speed and the other the maximum speed during transmit. The values I selected are shown in the schematic but these could be changed to suit your needs. They would probably have to be changed if you used a fan that had different current requirements. T ...
... can select for fan speed. One selects the standby speed and the other the maximum speed during transmit. The values I selected are shown in the schematic but these could be changed to suit your needs. They would probably have to be changed if you used a fan that had different current requirements. T ...
WATER COOLED POWER TETRODE 8974
... cation. It is recommended the tube be operated at full nominal voltage for an initial stabilization period of from 100 to 200 hours before any action is taken to operate at reduced filament voltage. The voltage should then be reduced gradually until there is slight degradation in performance (such a ...
... cation. It is recommended the tube be operated at full nominal voltage for an initial stabilization period of from 100 to 200 hours before any action is taken to operate at reduced filament voltage. The voltage should then be reduced gradually until there is slight degradation in performance (such a ...
Heathkit SB-220 - Orange County (California) Amateur Radio Club
... and filtering. This voltage is used to bias the 3500Z tubes, to operate the transfer relay and is tapped down to provide the ALC threshold voltage. These will be discussed more later. The Input Circuit: A separate pi-network input circuit exists for each of the five bands: 80, 40, 20, 15, & 10M. The ...
... and filtering. This voltage is used to bias the 3500Z tubes, to operate the transfer relay and is tapped down to provide the ALC threshold voltage. These will be discussed more later. The Input Circuit: A separate pi-network input circuit exists for each of the five bands: 80, 40, 20, 15, & 10M. The ...
EL DIABLO 100 Owners Manual
... • Always unplug the amp when changing the power or preamp tubes. Never touch the tubes if they are still hot. • Always wait to move the amp after use until the tubes have cooled. This will prevent tube damage and extend tube life. A few minutes should be sufficient. • While we have made every at ...
... • Always unplug the amp when changing the power or preamp tubes. Never touch the tubes if they are still hot. • Always wait to move the amp after use until the tubes have cooled. This will prevent tube damage and extend tube life. A few minutes should be sufficient. • While we have made every at ...
Audion Premier MC Step Up
... with most cartridges and being an active stage it does not need such close matching as you would with a transformer based product. Upgrade options are available for this model, see upgrade options at end. Can and has been made in hard wired mono_blocks Quality both inside and out The MC step up is a ...
... with most cartridges and being an active stage it does not need such close matching as you would with a transformer based product. Upgrade options are available for this model, see upgrade options at end. Can and has been made in hard wired mono_blocks Quality both inside and out The MC step up is a ...
Deuterium Triode Thyratron
... 5. The pulse width is measured on the discharge current waveform at the half peak current level. 6. For anode current pulse widths greater than 0.3 microseconds but less than 10 microseconds, a useful formula for estimating the allowable peak current is ib=ib0 (3/tp)Áת amps, where tp is the puls ...
... 5. The pulse width is measured on the discharge current waveform at the half peak current level. 6. For anode current pulse widths greater than 0.3 microseconds but less than 10 microseconds, a useful formula for estimating the allowable peak current is ib=ib0 (3/tp)Áת amps, where tp is the puls ...
Instruction Manual
... single-tone useful output power of about 300W. It can be used as a drop-in replacement for the 811A to provide up-graded performance. ...
... single-tone useful output power of about 300W. It can be used as a drop-in replacement for the 811A to provide up-graded performance. ...
How to restore your Tube radio
... Macro capability is great. Or hold a surplus macro lens in front of a digital camera with out macro capability. It works. Believe me. ...
... Macro capability is great. Or hold a surplus macro lens in front of a digital camera with out macro capability. It works. Believe me. ...
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.