Red Writing: information about the content of the policy
... Secondary short circuit current a) P1 winding b) P2 winding c) M winding Recommended maximum rating of fuses protecting the voltage transformer secondary windings ...
... Secondary short circuit current a) P1 winding b) P2 winding c) M winding Recommended maximum rating of fuses protecting the voltage transformer secondary windings ...
swr-3 swr/power meter installation manual
... 6. A 1:1 ratio is the ideal match. Adjustments on the antenna system should be made so that the SWR is as low as possible. A SWR of 2.0 is considered satisfactory, taking into account the line losses and slight mismatching. The operator is referred to the numerous articles in radio magazines and boo ...
... 6. A 1:1 ratio is the ideal match. Adjustments on the antenna system should be made so that the SWR is as low as possible. A SWR of 2.0 is considered satisfactory, taking into account the line losses and slight mismatching. The operator is referred to the numerous articles in radio magazines and boo ...
Datasheet
... CN5136 is a high-efficiency pulse frequency modulation (PFM) step-up DC-DC converter. It consists of a voltage reference, a comparator, on / off control circuit, the inductor current limit, the soft start block and power switch. CN5136 switching frequency is up to 300KHz, the circuit requires only t ...
... CN5136 is a high-efficiency pulse frequency modulation (PFM) step-up DC-DC converter. It consists of a voltage reference, a comparator, on / off control circuit, the inductor current limit, the soft start block and power switch. CN5136 switching frequency is up to 300KHz, the circuit requires only t ...
Tutorial 2 (AC Fundamentals)
... 8. A relay coil has an inductance of 8mH and a resistance of 30Ω. An alternating voltage v = 5 sin (5000t) is applied to the coil. a) ...
... 8. A relay coil has an inductance of 8mH and a resistance of 30Ω. An alternating voltage v = 5 sin (5000t) is applied to the coil. a) ...
Derive an efficient dual-rail power supply from USB
... As the output voltage continues to increase under the action of flyback, Q1 is driven even harder, causing its collector voltage to fall. Since the collector is connected to the control input of the 555 timer that is nominally the upper limit above (2VCC/3), this causes the capacitor to charge and ...
... As the output voltage continues to increase under the action of flyback, Q1 is driven even harder, causing its collector voltage to fall. Since the collector is connected to the control input of the 555 timer that is nominally the upper limit above (2VCC/3), this causes the capacitor to charge and ...
Electronic AC Voltage Source
... T he R E O P latypus is an electronic variable trans former with variable output frequency des igned for the us e in tes t labs . T he R E O P latypus provides an adjus table output voltage in the range of 0...300 V AC . T he output voltage given by the voltage s etpoint is continuous ly adjus ted u ...
... T he R E O P latypus is an electronic variable trans former with variable output frequency des igned for the us e in tes t labs . T he R E O P latypus provides an adjus table output voltage in the range of 0...300 V AC . T he output voltage given by the voltage s etpoint is continuous ly adjus ted u ...
Lecture Notes
... The SAME amount of current I passes through three different resistors. • R2 has twice the cross-sectional area and the same length as R1, • R3 is three times as long as R1 but has same cross-sectional area as R1. ...
... The SAME amount of current I passes through three different resistors. • R2 has twice the cross-sectional area and the same length as R1, • R3 is three times as long as R1 but has same cross-sectional area as R1. ...
microwave solid state devices
... • PARAMETRIC AMPLIFIERS. - named for the timevarying parameter, or value of capacitance, associated with the operation. • Since the underlying principle of operation is based on reactance, the parametric amplifier is sometimes called a ...
... • PARAMETRIC AMPLIFIERS. - named for the timevarying parameter, or value of capacitance, associated with the operation. • Since the underlying principle of operation is based on reactance, the parametric amplifier is sometimes called a ...
HEI Ignition Module For Use With Points
... When the points close, the voltage at the R2-D1 junction is zero, but D1 prevents C1 from discharging quickly. Assuming the engine stops turning so the points stay closed, C1 slowly discharges through the W terminal’s resistance. Meanwhile, G is no longer shorted and “floats” up to a voltage level ...
... When the points close, the voltage at the R2-D1 junction is zero, but D1 prevents C1 from discharging quickly. Assuming the engine stops turning so the points stay closed, C1 slowly discharges through the W terminal’s resistance. Meanwhile, G is no longer shorted and “floats” up to a voltage level ...
Charging_Capacitors
... range of large capacitors and resistors connected in series to a low voltage power supply, oscilloscope to view charging/discharging curves Note – depending on the students experience in connecting circuits, the circuits can be set up in advance or left for the students to connect. Action The studen ...
... range of large capacitors and resistors connected in series to a low voltage power supply, oscilloscope to view charging/discharging curves Note – depending on the students experience in connecting circuits, the circuits can be set up in advance or left for the students to connect. Action The studen ...
crystal sets to sideband
... Using the generator for AM modulation and CW Moving the 9 MHz SSB signal to a hamband Move the SSB only once! No wonder most ham rigs are transceivers Moving the 9 MHz signal to the difficult HF hambands Move the VFO first, then mix it with the SSB 9 MHz. Pick your oscillator and VFO frequencies car ...
... Using the generator for AM modulation and CW Moving the 9 MHz SSB signal to a hamband Move the SSB only once! No wonder most ham rigs are transceivers Moving the 9 MHz signal to the difficult HF hambands Move the VFO first, then mix it with the SSB 9 MHz. Pick your oscillator and VFO frequencies car ...
Product Data Sheet: DEHNconnect SD2 DCO SD2 MD HF 5 (917 970)
... ■ Disconnection module for disconnecting signal circuits for maintenance work ■ For installation in conformity with the lightning protection zone concept at the boundaries from 0B –2 and higher ...
... ■ Disconnection module for disconnecting signal circuits for maintenance work ■ For installation in conformity with the lightning protection zone concept at the boundaries from 0B –2 and higher ...
HamElmer.com Technician Test Self Study Guide
... have negative values, but in calculating VSWR from the reflection coefficient, only the "absolute value" is used - which is a positive value lying between 0 and 1. As the two travelling waves pass each other in opposite directions, they set up an interference pattern called a "standing wave". At cer ...
... have negative values, but in calculating VSWR from the reflection coefficient, only the "absolute value" is used - which is a positive value lying between 0 and 1. As the two travelling waves pass each other in opposite directions, they set up an interference pattern called a "standing wave". At cer ...
BSNL_Telecommodel2009 - 2 009
... Q.74 For the proper operation of MASER at a frequency of 10 GHz, the material used is (a) Al2 O3 with slight doping of chromium (b) Ti O2 with slight doping of iron (c) Ti O2 with slight doping of chromium (d) Al2 O3 with slight doping of iron Q.75 A rectangular waveguide is 4.2 cm by 1.85 cm. The ...
... Q.74 For the proper operation of MASER at a frequency of 10 GHz, the material used is (a) Al2 O3 with slight doping of chromium (b) Ti O2 with slight doping of iron (c) Ti O2 with slight doping of chromium (d) Al2 O3 with slight doping of iron Q.75 A rectangular waveguide is 4.2 cm by 1.85 cm. The ...
Electromagnetic Induction and Alternating current
... Show that in a series LCR circuit connected to an a.c. source exhibits resonance at its natural frequency equal to ...
... Show that in a series LCR circuit connected to an a.c. source exhibits resonance at its natural frequency equal to ...
Using Circuits, Signals and Instruments
... circuit at all. An amplifier, for example, might equally well be assembled from several centimeter-sized components connected by pieces of solid copper wire, or from a micron-scale pattern of thin metal and semiconductor films on the surface of a silicon wafer. Details of the geometry only become im ...
... circuit at all. An amplifier, for example, might equally well be assembled from several centimeter-sized components connected by pieces of solid copper wire, or from a micron-scale pattern of thin metal and semiconductor films on the surface of a silicon wafer. Details of the geometry only become im ...
Mobile Electric-Discharge Blasting Unit for Splitting off and
... tunnels and so on. The numerous studies have shown conclusive advantages of electric-discharge technology, such as absence of toxic substances, destructive acoustic and seismic shock waves, an ability to adjust transferred energy to destroyed object. The amount of stored energy is one of the main pa ...
... tunnels and so on. The numerous studies have shown conclusive advantages of electric-discharge technology, such as absence of toxic substances, destructive acoustic and seismic shock waves, an ability to adjust transferred energy to destroyed object. The amount of stored energy is one of the main pa ...
Alternating Current
... voltage leads the current in an LCR series circuit, change as the supply frequency is gradually increased from very low to very high values. ...
... voltage leads the current in an LCR series circuit, change as the supply frequency is gradually increased from very low to very high values. ...
Unit ELTK 08 Understanding the electrical principles associated with
... A 100% efficient single-phase transformer with supply voltage Vp = 23 V and a secondary voltage of 290 V has a power rating of 5 kVA. Calculate the: a) primary current ...
... A 100% efficient single-phase transformer with supply voltage Vp = 23 V and a secondary voltage of 290 V has a power rating of 5 kVA. Calculate the: a) primary current ...
Spark-gap transmitter
A spark-gap transmitter is a device that generates radio frequency electromagnetic waves using a spark gap.Spark gap transmitters were the first devices to demonstrate practical radio transmission, and were the standard technology for the first three decades of radio (1887–1916). Later, more efficient transmitters were developed based on rotary machines like the high-speed Alexanderson alternators and the static Poulsen Arc generators.Most operators, however, still preferred spark transmitters because of their uncomplicated design and because the carrier stopped when the telegraph key was released, which let the operator ""listen through"" for a reply. With other types of transmitter, the carrier could not be controlled so easily, and they required elaborate measures to modulate the carrier and to prevent transmitter leakage from de-sensitizing the receiver. After WWI, greatly improved transmitters based on vacuum tubes became available, which overcame these problems, and by the late 1920s the only spark transmitters still in regular operation were ""legacy"" installations on naval vessels. Even when vacuum tube based transmitters had been installed, many vessels retained their crude but reliable spark transmitters as an emergency backup. However, by 1940, the technology was no longer used for communication. Use of the spark-gap transmitter led to many radio operators being nicknamed ""Sparks"" long after they ceased using spark transmitters. Even today, the German verb funken, literally, ""to spark,"" also means ""to send a radio message or signal.""