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RF Amplifier Circuits
RF Amplifier Circuits
RF amplifier circuit diagram
By making this RF amplifier small power transmitters of 200 mW, can be transformed into a power transmitters reasonable, ranging between 2 and 3 W. The circuit is very simple. Network output filter suppresses noise by at least 55 dB. Amplifier is suitable for almost all types of transmissions, because of the possibility of adjusting the drain curr
ELECTRONIC STUDIO - RF AMPLIFIERS LINEAR AMPLIFIER FM AMPLIFIER
This amplifier designed for TV transposers and transmitters, it incorporates microstrip technology and discrete linear push-pull transistors with gold metalization and diffused emitter ballast resistors to enhance ruggedness and reliability. Fully assembled and tested with original ST transistors SD1490. RF power of 480W pep 27dBc min tetrafet
BLW96 RF Amplifier Circuit
BLW96 is a HF/VHF power transistor intended for use in class-A, AB and B operated high power industrial and military transmitting equipment in the h.f. and..
BLF245 FM 88-108 MHz RF Amplifier
This fm 88-108 Mhz radio amplifier is equiped with BLF 245 and can be user with a heatsink from a processor and cooler. The BLF 245 Datasheet can be downlo..
2SC2539 FM RF Amplifier
This FM broadcast rf amplifier is built with 2SC2539 which is a silicon NPN epitaxal planar type transistor designed for RF power amplifiers in VHF band mo..
300W FM RF Amplifier Circuit
This 300W RF power amplifier for your fm transmitter has 2 x TP9383 transistors. 300W radio power amplifier for 88 - 108 MHz band. 300W RF power amplifier..
BLY94 50W RF Amplifier Circuit
This fm rf power amplifier circuit is built with BLY94 transistor which delivers up to 50W at 175MHz and has a power gain of 7dB, arround 5x power amplification. But in this schematic bly94 is working in 3 meter band, FM 88-108 MHz, so it has a higher power gain, 8dB 6x. So if we use a good quality trimmers and coils with 7W input rf power BLY
1 Watt C-Class RF Amplifier
A simple and effective short-wave antenna amplifier circuit
This amplifier is the outdoor type, line installed outdoors, the amp`s main line; Figure 2 is the indoor power line box. Indoor and outdoor use between 50 ohm or 75 ohm coaxial cable to connect. e› 3 Figure 3, Figure 4 is the amplifier circuit board, and Figure 3 is the main circuit board, the actual size is 6. 4 cm G— 2. 4 cm Figure 4 is a...
60W Linear amplifier
The 60 Watt linear amplifier is simple all solid state circuit using power mosfet IRF840. The IRF series of power transistors are available in various voltage and power ratings. A single IRF840 can handle maximum power output of 125 watts. Since these transistors are used in inverters and smps they are easily available for around Rs: 20/-. The IRF
Opamp VHF FM Transmitter circuit
This opamp is available for only a few pounds. The AD8099 is a very fast opamp (1600 V/ms) and has high-impedance inputs with low input capacitance. The bandwidth of the opamp is so largethat at 100 MHz it still has a gain of nearly 40. This means that this opamp can be used to create an RC oscillator. The circuit presented here realises that....
Opamp VHF FM Transmitter
ICs that in the past were far too expensive for the hobbyist tend to be more favourably priced these days. An example of this is the AD8099 from Analog Devices. This opamp is available for only a few pounds. The AD8099 is a very fast opamp (1600 V/ms) and has high-impedance inputs with low input capacitance. The bandwidth of the opamp is so large
Micropower Dual Single Supply Precision Op Amp
The RH1078M is a micropower dual op amp in the standard 8-pin configuration. This device is optimized for single supply operation at 5V. Specifications for ±15V are also provided. Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain d
high level wideband rf preamplifier
broadcast band rf amplifier
The circuit has a frequency response ranging from 100Hz to 3 MHz; gain is about 30 dB. Field-effect transistor Q1 is configured in the common-source self-biased mode. Optional resistor R1 allows you to set the input impedance to any desired value; commonly, it will be 50 0. The signal is then direct coupled to Q2, a common-base circuit that isolat
Aligning the Henry Radio 30A02 (Tempo S-30) RF Amplifier
Circuit RF Amplifier
One of the best RF amplifiers ever published was Wes Hayward`s post mixer amplifier in the Progressive Communications Receiver. It quickly became known as a great high level RF amplifier. With a standing current of 50ma, it takes a very strong signal to upset this amplifier. Check out page 15. 24, figure 15. 33 of the 2000 ARRL Handbook for...
HF linear amplifier circuit
The PA output Pi section consists of 2 variable Cs (20 - 120pF and a second (home made) 50 - 450pF switched in for the lower bands by a simply modified 12v power relay). The anode choke (200t, 24swg 5" long on 1" dia PTFE tube stock) is mounted directly onto a 3300pF 10kV doorknob capacitor using a small turned brass ferule. The grid compartment.
The Defpom RF Preamplifier
Reliability analysis of pHEMT power amplifier with an on-chip linearizer
88MHz-108MHz 15W FM transmitter high-frequency amplifier
LINEAR RAMP GENERATOR
The linear charging ramp is most useful where linear control of voltage is required.Some possible applications are a long period voltage controlled timer, a voltage to pulse width converter, or a linear pulse width modulator. Q1 is the current source transistor, supplying constant current to the timing capacitor Ct. When the timer is triggered,...
Wideband RF Amplifier
This is a circuit of Wideband RF amplifiers. This circuit use current-feedback components like the THS3202. The THS3202 was chosen because it has fast slew rate and wide bandwidth. The amplifier voltage gain of this circuit is 20 and stage voltage gain of this circuit is 10. Here is the circuit: Compared to traditional RF circuitry, this circuit i
RF amplifier and filter for 10.7 MHz
The RF amplifier is similar to the one used in the 2. 5MHz amplifier. At a frequency of 10MHz the capacitances of a power MOS-FET become significant. Noiseless feedback by the use of transformers is no longer straightforward. Intermodulation and overtones are caused by the variation of the capacitances with the voltage. Performance is adequate if a
RF amplifier and filter for 144 MHz
The RF amplifiers use noiseless feedback through the drain-gate capacitance with an inductor in the source lead to provide the necessary 90 degree phase shift between gate voltage and channel current. The first RF amplifier gives about 4dB gain with a noise figure of about 2dB. The filter attenuates by about 3dB, then the second RF amplifier with
RF amplifier and filter for 70 MHz
The RF amplifier uses noiseless feedback through the drain-gate capacitance with an inductor in the source lead to provide the necessary 90 degree phase shift between gate voltage and channel current.
RF amplifier and filter for 2.5MHz
By use of transformers one can apply both voltage feedback and current feedback. There was an article in Ham Radio november 1979 by DJ2LR Ulrich Rohde giving details about this circuit. For the 2. 5MHz to audio converter the transformation ratio from drain to source is 2:1. The output transformer, TR3 in fig. 1, is 9 turns trifilar wound on a 16 mm
10W HF linear amplifier circuit schematics free electronic circuits diagram wiring design plans schema DIY projects handbook guide tutorial schematico electrG³nico schG©matique diagrama esquemG tico projeto elektronisch schematisch schaltplan schematy circuito shema … µ ° skematisk Schaltbild schematisk schaltung application manual
RF amplifier coupling
There are also other methods of coupling signals from one stage to another. Transformer coupling is the most common method used to couple rf amplifiers. Transformer coupling has many advantages over RC coupling for rf amplifiers; for example, transformer coupling uses fewer components than capacitive coupling. It can also provide a means of...
Power rf amplifier 802. 11g maxim max2247
Circuit for power linear RF amplifier with BLY90
It is to be used as amplifier of potency of RF in the high strip of of the power source that should be capable to supply a tension of 13 volts with a current of 10 amperes. it demands right care in the assembly of the source. Terrified armored transformer, and three shocks of RF to filter the components of high frequency. XRF1 and XRF2 are 30...
FM Radio Circuits
RF Transmitter Circuits
RF Receiver Circuits
AM Radio Circuits
FM Transmitter Circuits
Ultrasonic distance finder circuit
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is measured. There are three main categories of distance measurement methods in use: a) By...
Simple Metal detector circuit with CD4030
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to find something potentially valuable, hidden a few centimeters below the soil. So many...
Fully automatic watering circuit for flower pots
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This circuit comes as a solution to this problem. Depending on humidity of the pot at...
Simple deep searching metal detector circuit
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the circuit of this metal detector, it is possible to detect a metal coin in depth of 90 to...
Sub-Harmonic Bass Converter for Electric Guitars
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound, such as filtering or distortion. Instead, a frequency division system produces outputs...
Echo Depth Sounding Sonar for Boats
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the calibration of the rope. This arrangement still exists in some yachts. The big...
100W HiFi Audio Amplifier Circuit
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power supply must be symmetrical so that no electrolytic capacitors are needed at the outlet....
Plant-Pot Water Level Indicator Circuit
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower. The circuit of the device is shown in Figure 2. The water detection is made from the bottom...
Analogue Sound Preasure dB-Meter Circuit
The best human ear can capture sounds from 20Hz to 20KHz. These limits are known to be the broadest that can exist. Normally the normal limits range from 100Hz to about 13KHz and depend on the age and health of the individual. We for our measurements and to have a good accuracy we will get the limits of 20Hz to 20KHz. A sound to be heard does...
Digital Signal Integrity
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