RF Amplifier Circuits
- Page 2-
The circuit protects a solid-state relay from overloads. The circuit limits current, automatically disconnects the load after .. -
The frequency range of this amplifier is 1.8 to 54 MHz. The amount of RF drive required for full output is about 30 W... -
100 W output at 50 MHz is available from this circuit. Ul and Q2 form a T-R relay driver, switching the amplifie.. -
This amplifier is useful for applications where a 10- to 15-W peak-envelope-power (PEP) signal is needed i.. -
This circuit offers 10- to 15-dB gain from 400 to 850 MHz and is therefore eminently suitable for situations where th.. -
Using an NEC70083, this 1296-MHz amplifier delivers about 17-dB gain and around 1- to 1.5-dB noise. It is constructed.. -
The use of a loop antenna of large size (12 18") provides a large signal pickup at AM broadcast frequencies. It has.. -
This HF SW receiver preamplifier is comprised of a broadband toroidal transformer (LI-a and Ll-b), a complex LC network (comprised of a 1600- kHz, high-pass filter and a 32-MHz, low-pass filter), L2 and L3 (26 turns of #26 enameled wire wound on an Amidon.... -
The circuit has a frequency response that ranges from 100 Hz to 3 MHz; the gain is about 30 dB. Field-effect transistor Ql is configured in the common-source self-biased mode; optional resistor R1 allows you to set the input impedance to any desired value..... -
The SD1143 transistor provides a gain of about 14 dB in this circuit. It uses the fact that a 175-MHz device has a much higher gain when used at lower frequencies. The amplifier was originally designed to be used with a transverter. .. -
Except for the coupling and decoupling capacitors, IC1 is a complete wideband amplifier that has a fixed gain of 20 dB to 450 MHz. No external compensation is required. since the NE5205 functions as a gain block, two or more cart be easily cascaded to.... -
This linear amplifier delivers 10-W PEP output; with 1.25-W drive on 10 m. Tl, T2, and T3 are 10 turns of bifilar windings on an FT-50-43 toroidal core. The transformers are broadband. Filters for other bands, if desired, are shown. Note: use #26 wire for.... -
The low-cost Mini-Circuits MAR-X series of chips offer the RF builder a real advantage, with their inherent 50- input and output impedances (needed for RF systems). An MAR-1-based receiver/scanner preamplifier is shown. Ci and C2 are chip capacitors. Use.... -
The circuit, shown will produce up to 5-W RF output in the 40-m (7 MHz) amateur band. The coils shown are wound on toroidal cores (Armdon Associates Inc.). The part numbers are given in the schematic... -
Motorola MWA 110, 120, or 130 are wideband amplifier ICs. This wideband preamp circuit can be used in many applications. Keep the leads short when constructing the circuitry. PC board layout (shading represents copper) and parts layout. X is the feedthrough.... -
Simplicity and repeatability are featured in this 1 watt S-band amplifier design. The design uses an MRF2001 transistor as a common base, Class C amplifier. The amplifier delivers 1 watt output with 8 dB minimum gain at 24 V, and is tunable from 2.25 to 2.35.... -
Numbered components are so designated for PC-board layout purposes. C5 and C8 are disc ceramic. C6 and C7 are tantalum or electrolytic. Rl, R2 and R3 are Vi W carbon composition resistors. Silver-mica capacitors may be substituted for polystyrene (P) types... -
Cl, C2, and C3 are miniature ceramic or plastic trimmers- Tl (main winding) is 0.34 µ,. Use of 11 turns of no. 24 enameled wire on a T37-10 toroid core. The antenna winding has one turn, and Ql the source winding has three turns. T2 primary consists of 11.... -
Although the output is low level and cannot be loaded significantly without harming -accuracy, a single I.C. operational or instrumentation amplifier can supply both the linear gain and buffering for use with a variety of loads. .. -
The amplifier uses a grounded grid circuit with either the Eimac 3CX1000A7 or 8877, ceramic/metal triodes intended for linear service in the HF and VHF ranges. The amp provides the legal power output of 1500 watts PEP and CW service with no effort and.... -
That RF Amplifier is for boosting small fm transmitters and bugs. It use two Philips 2N4427 and its power is about 1Watt. At the output you can drive any linear with BGY133 or BLY87 and so on. Its power supply has to give 500mA current at 12 Volts. More.... -
175MHz high-frequency amplifier circuit by a field effect transistor shown in Fig. Field effect transistor VT is 3D04H, components, and parameters, .. -
j1PCI663 shame dynamic is input, differential output type of IC, but this circuit has a single-ended output, input.. -
There are two resonant circuits tuned amplifying circuit known as a double tuned amplifier circuit, i.e. the transformer Ti, T2 of the primary and secondary coils are provided has parallel resonance capacitor .. -
It shows a ceramic filter composed of FM IF amplifier circuit, the FM intermediate frequency amplifier circuit mainly by the IF input variable voltage regulator T}, ceramic filters CF1,.. -
877 ~ 924MHz RF2152 power amplifier constituting the circuit diagram: .. -
A wideband high-frequency amplifier is shown, the circuit resistance and capacitance coupling of common emitter amplifier can be used to amplify high frequency signals. When th.. -
As shown for the 400MHz broadband differential amplifier circuit. The circuit consists of two parts: the incoming broadband differential amplifier integrated chip OPA660 compos.. -
As shown in FIG constitute grounds RF2132 linear power amplifier circuit. Radio frequency (RF) signal from the input pin 3, via a preamplifier, after the last stage power ampli.. -
As shown in FIG constituted by 380MHz RF2175 linear amplifier application circuit. Radio frequency (RF) signal input from 6 feet, after the preamplifier, after the last stage p.. -
As shown in FIG constituted by 880MHz RF2347 low noise amplifier application circuit. Radio frequency (RF) signal from the input pin 3, after the output of the amplifier 7 feet.. -
As shown in FIG constituted by 915MHz RF2155 power amplifier application circuit. Radio frequency (RF) signal from the input pin 7, after the preamplifier, after the last stage..
New Circuits
-
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of.... -
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.... -
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.... -
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.... -
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.... -
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,.... -
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.... -
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.... -
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.....
Popular Circuits
If you use different batteries with actual capacity, with different self-discharge rate of...
On most FM tuners, the stereo indicator lights upon detection of the 19-kHz pilot tone. However,...
This circuit is configured for the 80m band. The 365-pF, broadcast-band variable capacitor should...
Many devices operate from a car"s 12-V electrical system. Some require 12 V; others require some...
When the light beam that falls in the CDS photocell is interrupted, transistor (EN3904) conducts...
This is a battery charger circuit, this circuit has advantages, which can cut off electrical...
This is design circuit for a low-cost voltage reference circuit. Its main component is a...
This circuit is designed to drive the 1W LEDs that are now commonly available. Their non-linear...
This is a simple NiCd battery charger powered by solar cells. A solar cell panel or an array of...
This 9-minute timer switch can be used to control the light in a toilet or bathroom. The timer is...
A used 250VA power transformer that was removed from equipment a couple of weeks ago. The...