vibro-champ.pdf
... would stay oscillating, with the footswitch just grounding the junction of the power tubes' *bias* resistors (it is cathode biased so ground is good) to remove the LFO component from the signal. That way either of these cheap amps would have trem knobs functional (or off when counterclockwise) witho ...
... would stay oscillating, with the footswitch just grounding the junction of the power tubes' *bias* resistors (it is cathode biased so ground is good) to remove the LFO component from the signal. That way either of these cheap amps would have trem knobs functional (or off when counterclockwise) witho ...
RF power generation - CERN Accelerator School
... AB. When the grid bias is made more negative than that required for class B operation the tube conducts for less than half the r.f. cycle and the operation is described as class C. Analysis similar to that given above shows that the ratio of the r.f. anode current to the d.c. anode current increases ...
... AB. When the grid bias is made more negative than that required for class B operation the tube conducts for less than half the r.f. cycle and the operation is described as class C. Analysis similar to that given above shows that the ratio of the r.f. anode current to the d.c. anode current increases ...
Heathkit W-4AM - Orange County (California) Amateur Radio Club
... are triode connected with the screen grid tied to the plate through a small resistance; however evidently Heath came out with a later version (perhaps designated the W-1A or WA-1) that has an updated output transformer providing “ultra-linear” taps for the screen grids. The W-1 appeared in 1949 or 1 ...
... are triode connected with the screen grid tied to the plate through a small resistance; however evidently Heath came out with a later version (perhaps designated the W-1A or WA-1) that has an updated output transformer providing “ultra-linear” taps for the screen grids. The W-1 appeared in 1949 or 1 ...
here - Phaedrus Audio
... After the Second World War, the collateral damage to German infrastructure was so severe that no nationwide electricity supply existed. Instead, many temporary and provisional mains electricity supplies were contrived; both AC and DC. As part of post-war reconstruction, there existed a market for ch ...
... After the Second World War, the collateral damage to German infrastructure was so severe that no nationwide electricity supply existed. Instead, many temporary and provisional mains electricity supplies were contrived; both AC and DC. As part of post-war reconstruction, there existed a market for ch ...
Build yourself a nixie clock!
... orange-glowing neon bulbs found in some powerpoints which are used as power-on indicators. These consist of a small glass bulb filled with neon gas. Inside the bulb are two wire electrodes, and when a high voltage is present across the electrodes, the neon gas between them glows a warm orange colour ...
... orange-glowing neon bulbs found in some powerpoints which are used as power-on indicators. These consist of a small glass bulb filled with neon gas. Inside the bulb are two wire electrodes, and when a high voltage is present across the electrodes, the neon gas between them glows a warm orange colour ...
Answer Key
... b. Write the overall cell reaction and determine the absolute minimum voltage that the battery must have to force this nonspontaneous reaction to occur. (I’ve said “absolute minimum,” because ordinarily an additional voltage known as an overvoltage (a.k.a. over potential or junction potential) must ...
... b. Write the overall cell reaction and determine the absolute minimum voltage that the battery must have to force this nonspontaneous reaction to occur. (I’ve said “absolute minimum,” because ordinarily an additional voltage known as an overvoltage (a.k.a. over potential or junction potential) must ...
Dynaco Power Amplifier
... structurally is 22 ga stranded wire with Teflon insulation. The other place for the negative bias voltage to be impacted is if current flows in the coupling caps (these are there to couple the audio signal from the driver stage into the output tube). Even a little leakage can cause problems since th ...
... structurally is 22 ga stranded wire with Teflon insulation. The other place for the negative bias voltage to be impacted is if current flows in the coupling caps (these are there to couple the audio signal from the driver stage into the output tube). Even a little leakage can cause problems since th ...
Detailed information document
... The circuitry has been modified around the vibrato channel. A 12AX7 valve base and associated tag strip is partly wired, but has been disconnected. The front panel tone controls for the tremolo are not implemented, as the pot in the treble position is a 1M switched pot, but is wired only for the swi ...
... The circuitry has been modified around the vibrato channel. A 12AX7 valve base and associated tag strip is partly wired, but has been disconnected. The front panel tone controls for the tremolo are not implemented, as the pot in the treble position is a 1M switched pot, but is wired only for the swi ...
EATING DISORDERS AND THEIR EFFECTS ON ORAL HEALTH
... 6. The heat produced during the production of x-rays is carried away from the copper stem and absorbed by the insulating oil in the tubehead. The x-rays produced are emitted from the target in all directions; however, the leadedglass housing prevents the x-rays from escaping from the x-ray tube 7. T ...
... 6. The heat produced during the production of x-rays is carried away from the copper stem and absorbed by the insulating oil in the tubehead. The x-rays produced are emitted from the target in all directions; however, the leadedglass housing prevents the x-rays from escaping from the x-ray tube 7. T ...
Magnatone 210 Details
... In audio amplifiers, Negative feedback (or NFB) is the reapplication of some portion of the output audio signal to the input of the amplifier in opposite phase potential such that part of the input signal is cancelled out due to the opposite phase relationship of the two signals (the two signals ...
... In audio amplifiers, Negative feedback (or NFB) is the reapplication of some portion of the output audio signal to the input of the amplifier in opposite phase potential such that part of the input signal is cancelled out due to the opposite phase relationship of the two signals (the two signals ...
Single-Ended “Big Iron” Guitar Amplifier Ray Lyons
... the main circuit. The fiberboard was laid out and soldered outside of the main chassis, and then placed in the chassis as one unit. It would have been extremely difficult to solder all of the connections while working inside the chassis. All of the high voltage leads on the capacitors were wrapped w ...
... the main circuit. The fiberboard was laid out and soldered outside of the main chassis, and then placed in the chassis as one unit. It would have been extremely difficult to solder all of the connections while working inside the chassis. All of the high voltage leads on the capacitors were wrapped w ...
Stereo 160 - Goldpoint Level Controls
... Before bias adjustments are made, the amplifier must be fully warmed up. As a minimum requirement, the amplifier should be turned on for 15 minutes prior to bias adjustments. Letting it idle for a full hour so that all components come up to full thermal equalization is also a good idea, but not usua ...
... Before bias adjustments are made, the amplifier must be fully warmed up. As a minimum requirement, the amplifier should be turned on for 15 minutes prior to bias adjustments. Letting it idle for a full hour so that all components come up to full thermal equalization is also a good idea, but not usua ...
Williamson amplifier restoration information
... 4.4 Output Stage – 807 Pentode-connected PushPull In this Class A push-pull output stage, both tubes conduct equivalent levels of current. The cathodes are raised above ground by a common unbypassed cathode resistor. A 10KΩ impedance plate-to-plate OPT presents signal currents into each tube with a ...
... 4.4 Output Stage – 807 Pentode-connected PushPull In this Class A push-pull output stage, both tubes conduct equivalent levels of current. The cathodes are raised above ground by a common unbypassed cathode resistor. A 10KΩ impedance plate-to-plate OPT presents signal currents into each tube with a ...
Rf power circuits: CERN perspective
... However, there is still a certain inventory of RF equipment recuperated from our old linacs, which can be useful for MICE, but need a thorough reconstruction and modernization. This reconstruction can be done outside CERN, but it would be more efficient and probably less expensive to do it at CE ...
... However, there is still a certain inventory of RF equipment recuperated from our old linacs, which can be useful for MICE, but need a thorough reconstruction and modernization. This reconstruction can be done outside CERN, but it would be more efficient and probably less expensive to do it at CE ...
Cleo 6 - Triode Dick`s Page
... ratio of the circuitry. I experienced it several times. It is just like if these things get broken and change in a noise source. The first time everything is well, the next time it can be sh*t. Better use a modern carbon resistor, which are very stable and within the specs. The noise properties are ...
... ratio of the circuitry. I experienced it several times. It is just like if these things get broken and change in a noise source. The first time everything is well, the next time it can be sh*t. Better use a modern carbon resistor, which are very stable and within the specs. The noise properties are ...
Owners Manual - Splawn Guitars
... 2. Standby Switch -Switches the high voltage on or off 3. Resonance Control -Low frequency control on the output section 4. Presence Control -High frequency control on the output section 5. Bass Control -Controls the bass frequency on the overdrive channel 6. Middle Control -Controls the middle freq ...
... 2. Standby Switch -Switches the high voltage on or off 3. Resonance Control -Low frequency control on the output section 4. Presence Control -High frequency control on the output section 5. Bass Control -Controls the bass frequency on the overdrive channel 6. Middle Control -Controls the middle freq ...
J.J. Thomson, Cathode Rays and the Electron Introduction
... a glass vacuum tube. The diagram at right shows a side view of the essential features inside the tube. By heating part of the cathode as a electric filament (marked F on the diagram) like a light bulb, the negatively charged particles can be freed from the metallic structure of the cathode. A voltag ...
... a glass vacuum tube. The diagram at right shows a side view of the essential features inside the tube. By heating part of the cathode as a electric filament (marked F on the diagram) like a light bulb, the negatively charged particles can be freed from the metallic structure of the cathode. A voltag ...
Online Casino Paysafe - Craps Virtual Player
... Three turns of no. 14 AWG (1.6 m m ) wound with 12.5m m (0.5-inch) diameter and 19-mm (0.75-inch) length connected in parallel with the resistors. The coil may be wound around one of the resistors. ...
... Three turns of no. 14 AWG (1.6 m m ) wound with 12.5m m (0.5-inch) diameter and 19-mm (0.75-inch) length connected in parallel with the resistors. The coil may be wound around one of the resistors. ...
d) 16 anodes and 32 common cathodes
... General rules for any LED design (no math): 1. Always scan the smallest (either Anode Rows or Cathode Columns) amount. 2. Current limiting resistors go on opposite of what is being scanned (e.g. if columns are being scanned then current resistors go on anodes). Current limiting resistors are never o ...
... General rules for any LED design (no math): 1. Always scan the smallest (either Anode Rows or Cathode Columns) amount. 2. Current limiting resistors go on opposite of what is being scanned (e.g. if columns are being scanned then current resistors go on anodes). Current limiting resistors are never o ...
Plitron Manufacturing - Engineered to Perform Like No Others
... with a 2V RMS signal input, was 325V pp, 356V pp, and 390V pp, respectively. 3. The overall voltage gain was approxi- ...
... with a 2V RMS signal input, was 325V pp, 356V pp, and 390V pp, respectively. 3. The overall voltage gain was approxi- ...
Book 5 - radartutorial.eu
... „Radartutorial“ (www.radartutorial.eu) Physical construction and functional describing The Traveling Wave Tube (TWT) is a high-gain, low-noise, wide-bandwidth microwave amplifier. It is capable of gains greater than 40 dB with bandwidths exceeding an octave. (A bandwidth of one octave is one in whi ...
... „Radartutorial“ (www.radartutorial.eu) Physical construction and functional describing The Traveling Wave Tube (TWT) is a high-gain, low-noise, wide-bandwidth microwave amplifier. It is capable of gains greater than 40 dB with bandwidths exceeding an octave. (A bandwidth of one octave is one in whi ...
detecting radioactivity recording the characteristic of a geiger
... is applied to the tube, electrons in the gas near the anode, and positive ions in the gas near the cathode, are collected almost instantaneously. The remainder of the electrons and ions, together with products of the ion multiplication, follow in rapid succession. The resulting current pulse produce ...
... is applied to the tube, electrons in the gas near the anode, and positive ions in the gas near the cathode, are collected almost instantaneously. The remainder of the electrons and ions, together with products of the ion multiplication, follow in rapid succession. The resulting current pulse produce ...
Zhenxing_Wang-CLIC-20150129
... Vacuum arc can destroy the contact surfaces severely. There are three stages in the post –arc stage: Residual plasma dissipates from the gap. Metal vapor dissipates from the gap. The gap recovers to vacuum. If the contacts can withstand the transient voltage and turn to be vacuum again t ...
... Vacuum arc can destroy the contact surfaces severely. There are three stages in the post –arc stage: Residual plasma dissipates from the gap. Metal vapor dissipates from the gap. The gap recovers to vacuum. If the contacts can withstand the transient voltage and turn to be vacuum again t ...
Ω - QSL.net
... good substitute. The SM cap being a more temperature stable type, and able to carry more RF current without heating up. The letter "D" points to the filament line. I feel that a choke is needed, even with tubes that are "indirectly-heated" cathodes. Here is my reasoning as to why; RF voltage potenti ...
... good substitute. The SM cap being a more temperature stable type, and able to carry more RF current without heating up. The letter "D" points to the filament line. I feel that a choke is needed, even with tubes that are "indirectly-heated" cathodes. Here is my reasoning as to why; RF voltage potenti ...
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.