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KNBC's 550 foot tower was completed in 1949 and still serves KNBR today. The tower is easily visible to motorists crossing the San Mateo Bridge. Capacitance hat seen on top. The old KPO east tower is to the right and is kept as a back-up antenna and still standing today. The first KNBC-FM antenna can be seen at its top in this 1949 photo
★Item: WallDim005
★supply voltage: DC12-24V
★output: 3 channels
★connection mode: common anode
★gross weight: 185g
★static power consumption: <1W
★output current: <4A( each channel )
★output power: 12V<144W,24V<288W
★★★★★
Touch panel controller is a new high-end controller which newly developed by our company. It adopts glass panel design, is beautiful and fashionable in appearance. It adopts high precision capacitance touch control chip, increases the touch sensitivity, reduces trigger which caused by mistake. It is used for controlling a variety of lamp whose source of light is LED. For instance, point source of light,flexible light strip, wall washer lamp, panel lights etc., it has many advantages such as convenient to connect, easy to use and others. According to the actual need of customers,it can carry out jumpy changing,gradual changing,stroboflash and other effects of change.
4CX1000A TETRODE
Plate Dissipation (Max.) 1000 Watts
Screen Dissipation (Max.) 12 Watts
Grid Dissipation (Max.) 0 Watts
Frequency for Max. rating (CW) 110 MHz
Amplification Factor ---
Filament/Cathode Oxide Coated
Voltage 6.0 Volts
Current 9.0 Amps
Capacitance Grounded Cathode
Input 81.0 pf
Output 11.8 pf
Feedthrough .01 pf
Capacitance Grounded Grid
Input 35.5 pf
Output 12.0 pf
Feedthrough .00 pf
Cooling Forced Air
Base Special, Breechblock
Air Socket SK-800B
Air Chimney SK-806
Boiler ---
Length 4.80 in; 122.00 mm
Diameter 3.37 in; 85.50 mm
Weight 27 oz; 0.77
1500pfX2 30KV HV Metalized Film Capacitors
Manufacturer Supply High Voltage Plastic Film Capacitor
35KV 3000pf metallized polyester film capacitor, 30KV 3000pf High Voltage Polyester Film Capacitor, 1500pfX2 30KV, 1500pfX2 35KV, 1500X2K4F film capacitor, 30KV 6000pf film capacitor, 35KV 4700pf metallized film capacitor, 30KV 2700pf plastic film capacitor
Construction:
Evaporation process produced within string structure metalized polyester film
Small size, high operating voltage, high-frequency characteristics, Suitable for high-voltage AC DC circuit
Applications:
Electrostatic spraying equipment,
High voltage electrostatic precipitator power supply,
Industrial / Commercial Electrostatic Air Purifier,
High voltage electrical measuring equipment,
High-power HV electrostatic flocking equipment,
High-frequency electrostatic power supply
X-ray power Supply
X-ray Generator
Specifications,
Capacitance Range: 100PF to 200000PF
Voltage Range: 5KV to 100KV
Capacitance, 100pf, 110pf, 500pf, 510pf, 560pf, 700pf, 750pf, 1000pf, 1500pf, 2000pf, 2700pf, 3000pf, 3900pf, 4000pf, 4500pf, 4700pf, 5400pf, 5600pf, 6000pf, 6800pf, 7000pf, 7600pf, 8000pf, 10000pf, 15000pf
Voltage: 5kv, 10kv, 15kv, 20kv, 27kv, 30kv, 35kv, 40kv, 50kv, 60kv, 80kv, 100kv
100pF/10KV, 110pf/20KV, 27kv/2700pf, 500pf/50kv, 560pf/50kv, 700pf/50kv, 750pf/50kv, 6000pf/20kv, 1500pf/15kv, 1500pf/35kv, 3000pf/35kv, 4500pf/35kv, 510pF/30KV,
1000pF/30KV, 2000pF/30KV, 1000pF/40KV, 3000pf/30kv, 30KV/2700pf, 4000pf/40kv,
5400pf/30kv, 7000pf/50kv, 7600pf/40kv, 1000pf/50kv, 1000pf/80kv, 2000pf/20Kv,
5000pf/20kv, 2000pf/80kv, 8000pf /20kv, 4000pf/20kv, 10000pf/20kv, 10000pf/30kv,
15000pf/30kv, 6800pf/30kv, 3900pf/30kv, 1000pf/100kv, 500pf/100kv, 40KV/7500pf,
40kv/8200pf, 40kv/10000pf, 40kv/15000pf, 40kv/25000pf, 40kv/35000pf, 40kv/50000pf,
20KV/20000pf, 20KV/30000pf, 20kv/50000pf, 20kv/100000pf, 20kv/200000pf, 30kv/20000pf, 30kv/50000pf, 30KV/100000pf, 30kv/200000pf, 60KV/5600pf, 35KV/2700pf, 30KV/4000pf
1500pfX2 30KV, 1500pfX2 35KV, 1500PFX2 30KV, 1500PFX2 35KV, 1500X2K4F
Lots of capacitors, This circuit generates approimately +/-24V from a 9-volt battery. The 24 volts will be fed into an op-amp controlled regulator to generate a steady +/-12v with enough headroom to allow a decent amount of current without sagging.
The capacitors are pumped using a simple 555 timer configured to generate a 15kHz signal. This would not be appropriate to power anything audio, but would work fine for experimentation. Partially this is due to the slow switching of the diodes; I don't have the appropriate shottky diodes to allow for a higher pump frequency, and this is on a breadboard, which has much higher parasitic capacitance than other circuit wiring methods.
Sunand Santhanagopalan, Mechanical Engineering
Advisor: Dr. Dennis D. Meng
Ever-increasing energy demands have augmented interest in innovative and efficient energy storage devices like supercapacitors, fuel cells, lithium ion batteries etc. Vertically-aligned nano-forests have been regarded as an inspired solution to significantly enhance the performance of such devices, due to high surface areas, fast electron/ion transport mechanisms and other such excellent properties. Significant efforts are being made to achieve such aligned structures on conductive surfaces under mild, IC-compatible conditions for application in various electrochemical energy applications. A room-temperature process namely high voltage Electrophoretic deposition (HVEPD) has been developed to deposit vertically-aligned arrays of 1D nanoparticles on conductive substrates. The versatility and generic nature of the process has been demonstrated by deposition on flexible and transparent substrates to form vertically-aligned nanoforests of multi-walled carbon nanotubes (MWCNTs) and manganese dioxide nanorods (MnO2 nanorods). A detailed study of the process parameters shows that three key factors enable the success of this process: high deposition voltage for alignment, low dispersion concentration of the nanoparticles to avoid aggregation, and simultaneous formation of a holding layer by electrodeposition. Compared to their randomly ordered counterparts, the vertical nanoforests showed higher electrochemical capacitance, lower electrical resistance and the capability to achieve superhydrophobicity, indicating their potential in a broad range of applications. Further the use of a conductive holding layer has been employed to reduce the contact resistance and improve the electrochemical performance of the vertically aligned MnO2 nanorods. A 48% increase in the capacitance was found when a conductive holding layer was used as com- pared to the previously used resistive holding layer showing great promise for use in electrochemical applications.
I tested it to 16Mhz, but the theoretical maximum is somewhere near 150Mhz (I do not have generator capable of this frequency..).
With the addition of LC to F converter, I'm also able to use this counter to measure inductance and capacitance.
Xenon proportional detector with Be window plugs direct to charge amplifier, no cable, best signal to noise with minimum added capacitance.
Center contact generously rounded at rear to avoid electrostatic stress line concentration that could produce corona noise. Nominal 1850 to 1900 VDC for initial tests.
Shield braid only under grounding taper washer and rubber compression washer to maximize surface leakage creep distance. Alcohol washed insulation prior to final assembly.
Quilted conductive copper tape completes electrostatic shielding of assembly.
This structure for acceptance testing only, tube will go into a future XRF shield chamber with an x-ray tube source.
Electron Tube 3CX2500F3
GENERAL PARAMETER
Filament Voltage: 7. 5 V
Filament Current: 51. 5 A
Transconductance: 20 mA/V
Amplification Factor: 20
Interelectrode Capacitance (Grouded Cathode)
Cin: 35 pF
Cout: 0.9 pF
Cgp: 20 pF
Operation Position: Vertical, base up or down
Cooling: Forced Air
Maximum Anode Core and Seal Temprature: 250
Maximum Height: 468. 30 mm
Maximum Diam: 105. 56 mm
Weight: 3. 4 kg
Vishay’s new 4-line VCUT05A4-05S-G-08 BiSy ESD protection diode array and VBUS054CV-06S-G-08 bus port ESD protection array offer low typical capacitance down to 1.2 pF and 18 pF, and leakage current of < 0.1 µA in the SOT23-5L and SOT23-6L packages. (Click ALL SIZES for hi-res version.)
11/12/2013. VPG's Vishay Foil Resistors brand (VFR) introduces a new series of ultra-high-precision, through-hole Z-Foil resistors designed to provide low noise and low inductance/capacitance for high-end audio applications requiring distortion-free properties. The conformally coated, low-profile AUR series devices feature low TCR down to 0.05 ppm/°C nominal from 0°C to +60°C, +25°C ref, tolerances down to ±0.01%, and load-life stability to ±0.01% after 2,000 hours at +70°C.
Fluke 15B Digital Multimeter offers features like AC/DC voltage measurement along with functions like diode test, capacitance measurement and continuity detection. Visit www.fluke.com/fluke/inen/products/digital-multimeters.htm to view the various types of digital multimeters.
Image caption: Graphene Sunrise
Abstract: The actual measurements of the electronic capacitance of graphene in magnetic field. Due to so called “quantum capacitance" the measurements of capacitance of graphene samples are sensitive to electronic states. In magnetic field electrons move along circular orbits, which restricts the space they occupy and leads to them bunching on so called “Landau energy levels”, which are seen through high capacitance (represented by blue colour here). As the magnetic field squeezes electrons on tighter orbits, more and more of them can fit into a Landau level, which can be seen as a fun diagram of sun rays spreading from the centre of the image. At high magnetic field (top of the image) more subtle effects of degeneracy lifting and fractional quantum Hall effect can be noticed.
30KV 3000pf HV Metalized Film Capacitors
Manufacturer Supply 100PF~10000PF, 5KV~100KV High Voltage Plastic Film Capacitor
Construction:
Evaporation process produced within string structure metalized polyester film
Small size, high operating voltage, high-frequency characteristics, Suitable for high-voltage AC DC circuit
Applications:
Electrostatic spraying equipment,
High voltage electrostatic precipitator power supply,
Industrial / Commercial Electrostatic Air Purifier,
High voltage electrical measuring equipment,
High-power HV electrostatic flocking equipment,
High-frequency electrostatic power supply
X-ray power Supply
X-ray Generator
Specifications,
Capacitance Range: 100PF to 10000PF
Voltage Range: 5KV to 100KV
Capacitance, 100pf, 110pf, 500pf, 510pf, 560pf, 700pf, 750pf, 1000pf, 1500pf, 2000pf, 3000pf, 3900pf, 4000pf, 4500pf, 5400pf, 6000pf, 6800pf, 7000pf, 7600pf, 8000pf, 10000pf, 15000pf
Voltage: 5kv, 10kv, 15kv, 20kv, 30kv, 35kv, 40kv, 50kv, 80kv, 100kv
100pF/10KV, 110Pf/20KV, 500pf/50kv, 560pf/50kv, 700pf/50kv, 750pf/50kv, 6000pf/20kv, 1500pf/15kv, 1500pf/35kv, 3000pf/35kv, 4500pf/35kv, 510pF/30KV, 1000pF/30KV, 2000pF/30KV, 1000pF/40KV, 3000pf/30kv, 6000pf/20kv, 4000pf/ 40kv, 5400pf/30kv, 7000pf/50kv, 7600pf/40kv, 1000pf/50kv, 1000pf/80kv, 5000pf/20kv, 2000pf/80kv, 2000pf/30kv, 1000pf/30kv, 8000pf/20kv, 4000pf/20kv, 10000pf/20kv, 10000pf/30kv, 15000pf/30kv, 6800pf/30kv, 3900pf/30kv, 1000pf/1000kv, 500pf/100kv
KNBC's Joe Baker (left) with a construction worker, climbed to the top of the new tower upon its completion in 1949. He is standing on the capacitance "top hat" part of the antenna.
I got this little capacitance meter (just 8€) for measuring the variable capacitance of a capacitive-slider test board. Now I can choose the right size storage capacitor for it. The pad pattern I chose seems to be a bit too large. It does matter quite a lot how much contact the finger makes. Hopefully I will get better results when I evaluate both pads and use the difference value.
C B 8 G series dry-type compound die high-voltage capacitor
It is a new kind of improved and developed product based on the previous high-vcltage micapaper Condensers.It's dielectric properties are better,ghe natural induciance is minor,the high-frequence dielectric loss is low,the absorption coefficient is small,and the overload capacity is strong.These products are mainly applied to the vacuum tube high-frequence induction heating apparatus abore 30KM ,and are used as the anode partition direct condenser,the bypass capacitor and the feedback capacitance in the superaudio and the welding equipments.
Paul Speltz gave a fascinating demonstration of wire capacitance, resistance, and induction using a spectrum analyzer. The effect of movement on wire, for example, could be easily seen in the scope traces. We will be publishing more on Paul's demonstration, and his solution to the problem of getting his 4 ohm speakers to work properly with an amp that only likes 16 ohm loads.
Got the second fuel level probe bent into shape and test-fit. For some reason I bent this one aft of the stiffener, so it required a bonus bend to get it aiming a bit more aft at the far end. If you're looking for advice on where to make the bends, definitely do what I did on the left tank, not this one.
Being working with electronics components and instruments it took my interest to think about taking a shot with these capacitors soldered in a Timer card
Copper traces and resistors support leds and dandelion blooms (and act as a capacitance sensor, methinks). Get too close and the lights flash.
From the Design Academy Eindhoven.
Name: Capacitance Butt Welding Machine
Input Voltage: 170V-250V AC
Output Voltage: 5V-49V AC
Frequency: 40-60 HZ
Rated Power: 3 KW
Rated Current: 50A
Working Temperature: -10oC-+70oC
Working Time Range: 1-9999 S
Time Resolution Ratio: 1 S
Time Deviation: 0.1%
Output Voltage Deviation: 1%
Record Storage: 500 PCS
Packing Dimension: 32x21x24CM
Weight: 23KG
New ESD protection devices provide 20 percent lower profile and boast 0.5 pF typical capacitance and low clamping voltage.
Vishay’s new 095 PLL-4TSI series of 4-terminal, snap-in power aluminum capacitors offers a long useful life of 10,000 h at + 85 °C and high capacitance/voltage combinations from 390 µF at 450 V to 2,200 µF at 350 V in 17 large case sizes. (Click ALL SIZES for hi-res version.)
For smartphones, tablets, notebooks, and wearables, the Vishay Semiconductors VBUS05M2-HT1 bidirectional symmetrical (BiSy) 2-line ESD protection diode offers low capacitance and leakage current in the ultra-compact LLP1006-3L package.
Michael Faraday FRS (22 September 1791 – 25 August 1867) was an English scientist who contributed to the study of electromagnetism and electrochemistry. His main discoveries include the principles underlying electromagnetic induction, diamagnetism and electrolysis.
Although Faraday received little formal education, he was one of the most influential scientists in history. It was by his research on the magnetic field around a conductor carrying a direct current that Faraday established the basis for the concept of the electromagnetic field in physics. Faraday also established that magnetism could affect rays of light and that there was an underlying relationship between the two phenomena. He similarly discovered the principles of electromagnetic induction and diamagnetism, and the laws of electrolysis. His inventions of electromagnetic rotary devices formed the foundation of electric motor technology, and it was largely due to his efforts that electricity became practical for use in technology.
As a chemist, Faraday discovered benzene, investigated the clathrate hydrate of chlorine, invented an early form of the Bunsen burner and the system of oxidation numbers, and popularised terminology such as "anode", "cathode", "electrode" and "ion". Faraday ultimately became the first and foremost Fullerian Professor of Chemistry at the Royal Institution, a lifetime position.
Faraday was an excellent experimentalist who conveyed his ideas in clear and simple language; his mathematical abilities, however, did not extend as far as trigonometry and were limited to the simplest algebra. James Clerk Maxwell took the work of Faraday and others and summarized it in a set of equations which is accepted as the basis of all modern theories of electromagnetic phenomena. On Faraday's uses of lines of force, Maxwell wrote that they show Faraday "to have been in reality a mathematician of a very high order – one from whom the mathematicians of the future may derive valuable and fertile methods." The SI unit of capacitance is named in his honour: the farad.
Albert Einstein kept a picture of Faraday on his study wall, alongside pictures of Isaac Newton and James Clerk Maxwell. Physicist Ernest Rutherford stated, "When we consider the magnitude and extent of his discoveries and their influence on the progress of science and of industry, there is no honour too great to pay to the memory of Faraday, one of the greatest scientific discoverers of all time." (Wikipedia).
Vishay’s new VBUS053BZ-HNH-G-08 bus port protection array features low capacitance of 0.7 pF and leakage currents down to 0.085 μA in a compact LLP package with an ultra-low 0.6-mm profile. (Click ALL SIZES for hi-res version.)
Michael Faraday, FRS (22 September 1791 – 25 August 1867) was an English chemist and physicist (or natural philosopher, in the terminology of the time) who contributed to the fields of electromagnetism and electrochemistry.
Faraday studied the magnetic field around a conductor carrying a DC electric current. While conducting these studies, Faraday established the basis for the electromagnetic field concept in physics, subsequently enlarged upon by James Maxwell. He similarly discovered electromagnetic induction, diamagnetism, and laws of electrolysis. He established that magnetism could affect rays of light and that there was an underlying relationship between the two phenomena.[2][3] His inventions of electromagnetic rotary devices formed the foundation of electric motor technology, and it was largely due to his efforts that electricity became viable for use in technology.
As a chemist, Michael Faraday discovered benzene, investigated the clathrate hydrate of chlorine, invented an early form of the Bunsen burner and the system of oxidation numbers, and popularised terminology such as anode, cathode, electrode, and ion.
Although Faraday received little formal education and knew little of higher mathematics, such as calculus, he was one of the most influential scientists in history. Historians[4] of science refer to him as the best experimentalist in the history of science.[5] The SI unit of capacitance, the farad, is named after him, as is the Faraday constant, the charge on a mole of electrons (about 96,485 coulombs). Faraday's law of induction states that magnetic flux changing in time creates a proportional electromotive force.
Faraday was the first and foremost Fullerian Professor of Chemistry at the Royal Institution of Great Britain, a position to which he was appointed for life.
Albert Einstein kept a photograph of Faraday on his study wall alongside pictures of Isaac Newton and James Clerk Maxwell.[6]