DigiLink - Scope Communications
... A programming kit is available if you need to reconfigure the system. Additional transmitters and receivers can be added when ...
... A programming kit is available if you need to reconfigure the system. Additional transmitters and receivers can be added when ...
Blackbird Vacuum Tube Preamp
... with equivalent miniature 9-pin double triode tubes from other manufacturers - Mil-Spec NOS tubes are recommended! The tube in the top right hand corner is the first gain stage and replacing this with types 12AV7, 12AT7 or 12AY7 will yield lower gain and shift the bias point to create different brea ...
... with equivalent miniature 9-pin double triode tubes from other manufacturers - Mil-Spec NOS tubes are recommended! The tube in the top right hand corner is the first gain stage and replacing this with types 12AV7, 12AT7 or 12AY7 will yield lower gain and shift the bias point to create different brea ...
Voltage Transfer Characteristic, BJT Biasing 1
... Need to substitute in the linear equation Vi = 1.7 V and VO stays constant at 0.2V until Vi = 5V ...
... Need to substitute in the linear equation Vi = 1.7 V and VO stays constant at 0.2V until Vi = 5V ...
Ohm’s Law Worksheet
... 1. What is the current in a 10V circuit if the resistance is 2Ω? 2. What is the current in a 120V circuit if the resistance 20Ω? 3. What is the current in a 120V circuit if the resistance 10Ω? 4. What is the current in a 120V circuit if the resistance 5Ω? 5. Based on questions 2, 3, and 4, what happ ...
... 1. What is the current in a 10V circuit if the resistance is 2Ω? 2. What is the current in a 120V circuit if the resistance 20Ω? 3. What is the current in a 120V circuit if the resistance 10Ω? 4. What is the current in a 120V circuit if the resistance 5Ω? 5. Based on questions 2, 3, and 4, what happ ...
Circuit Breakers - 123SeminarsOnly.com
... The high pressure of the gas blows out the arc Cold oil flows onto the arc which is extinguished. Used in low and medium voltages up to 110 kV. ...
... The high pressure of the gas blows out the arc Cold oil flows onto the arc which is extinguished. Used in low and medium voltages up to 110 kV. ...
Static electricity
... • If circuit breaks, then current passes thru other paths and those devices continue to work ...
... • If circuit breaks, then current passes thru other paths and those devices continue to work ...
A solid state replacement for the 3TF7 current regulator of the R
... There are two VFOs in the R-390(A), i.e. the BFO and the PTO. Frequency stability among other things is heavily influenced by supply voltages. Collins engineers spent a regulated power supply for B+ voltages (+150 VDC) for both VFO tubes. For the stabilization of the tube heating current regulator 3 ...
... There are two VFOs in the R-390(A), i.e. the BFO and the PTO. Frequency stability among other things is heavily influenced by supply voltages. Collins engineers spent a regulated power supply for B+ voltages (+150 VDC) for both VFO tubes. For the stabilization of the tube heating current regulator 3 ...
File - the Analysis of Electrical Engineering ELEC 291
... current and voltage source to make one equivalent voltage source. Treat the 6.4Ω resistor as the load resistor. Draw the resulting circuit indicating the voltage source value and the resulting internal impedance attached to the 6.4Ω load resistor. ...
... current and voltage source to make one equivalent voltage source. Treat the 6.4Ω resistor as the load resistor. Draw the resulting circuit indicating the voltage source value and the resulting internal impedance attached to the 6.4Ω load resistor. ...
basic system gain structure
... voltage specification for each piece of electronics. The preferable tool is an oscilloscope that can be used to observe the signal directly. If neither of these are available, you can use the level or clipping indicators on each piece of equipment in the signal chain. Without some method of determin ...
... voltage specification for each piece of electronics. The preferable tool is an oscilloscope that can be used to observe the signal directly. If neither of these are available, you can use the level or clipping indicators on each piece of equipment in the signal chain. Without some method of determin ...
Debugging Techniques
... • Put test points at appropriate places on the PCB • Test points are places where there is an a pin (or an exposed metal run, but this is not really good practice) at an input or output terminal of a component so that you can measure the voltage at these points. • Test points can also be used to inj ...
... • Put test points at appropriate places on the PCB • Test points are places where there is an a pin (or an exposed metal run, but this is not really good practice) at an input or output terminal of a component so that you can measure the voltage at these points. • Test points can also be used to inj ...
An Analog Bionic Ear Processor with Zero-Crossing Detection
... the 16 spectral channels, a zero-crossing detection circuit that reports zero crossings in each channel with 10µs precision (at 10kHz) and almost no power overhead, and active fourth-order programmable bandpass filters that sharpen filter bandwidths. In addition, biasing, distribution, and calibrati ...
... the 16 spectral channels, a zero-crossing detection circuit that reports zero crossings in each channel with 10µs precision (at 10kHz) and almost no power overhead, and active fourth-order programmable bandpass filters that sharpen filter bandwidths. In addition, biasing, distribution, and calibrati ...
THE KNIGHTLITE SMITE 80m CW QRP TRANSCEIVER The Oscillator
... Q1, a 2N2222 in this design, can be any general purpose NPN bipolar transistor. In an oscillator, the active device (usually a transistor or FET) provides gain which must be greater than unity at the operating frequency. In addition, a feedback network couples a portion of the output signal back to ...
... Q1, a 2N2222 in this design, can be any general purpose NPN bipolar transistor. In an oscillator, the active device (usually a transistor or FET) provides gain which must be greater than unity at the operating frequency. In addition, a feedback network couples a portion of the output signal back to ...
BJT Amplifiers Lecture Slides
... – Use this equivalent circuit to analyze the AC characteristics of the amplifier. – Combine the results of dc and ac analysis (superposition) to yield the total voltages and currents in the circuit. ...
... – Use this equivalent circuit to analyze the AC characteristics of the amplifier. – Combine the results of dc and ac analysis (superposition) to yield the total voltages and currents in the circuit. ...
Regenerative circuit
The regenerative circuit (or regen) allows an electronic signal to be amplified many times by the same active device. It consists of an amplifying vacuum tube or transistor with its output connected to its input through a feedback loop, providing positive feedback. This circuit was widely used in radio receivers, called regenerative receivers, between 1915 and World War II. The regenerative receiver was invented in 1912 and patented in 1914 by American electrical engineer Edwin Armstrong when he was an undergraduate at Columbia University. Due partly to its tendency to radiate interference, by the 1930s the regenerative receiver was superseded by other receiver designs, the TRF and superheterodyne receivers and became obsolete, but regeneration (now called positive feedback) is widely used in other areas of electronics, such as in oscillators and active filters. A receiver circuit that used regeneration in a more complicated way to achieve even higher amplification, the superregenerative receiver, was invented by Armstrong in 1922. It was never widely used in general receivers, but due to its small parts count is used in a few specialized low data rate applications, such as garage door openers, wireless networking devices, walkie-talkies and toys.