Antenna Tuner Circuits
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The antenna tunning circuit can accommodate 1/2 wave length antennas or higher, for input resistances of 50 Ohms which make it suitable for CB (Citizen Band) transceivers. C1 is for fine tunning and C2 is just for tunning. Turning C3 with the help of C2.... -
This antenna tuner is suitable for use with low-power (less than 5 W) transmitters or SW receivers. S2 selects inductance and S2 connects the 365-pF capacitor to either the transmitter or the side of the inductor. The tiny tuner is comprised of a tapped.... -
This circuit is for a QRP (low power) antenna tuner, a.k.a. a transmatch, for use in the short wave amateur radio bands from 3-30 Mhz. It allows a wide variety of antennas to be connected to a low power transmitter. When the circuit is properly tuned, the.... -
Almost any receiver covering 540 kHz to 1600 kHz is suitable for broadcast band DX`ing, and there are a lot of them. But the antenna is another matter. If you are new to the hobby, or if you have been having trouble DX`ing those really difficult stations,.... -
This circuit is for a QRP (low power) antenna tuner, a.k.a. a transmatch, for use in the short wave amateur radio bands from 3-30 Mhz. It allows a wide variety of antennas to be connected to a low power transmitter. When the circuit is properly tuned, the.... -
A ground loop in your AV system caused by antenna connection or TV cable is very common if you have your computer connected to the same system. This type of ground loop problem can be solved by using suitable isolation between your AV system and the antenna.... -
Low power ( 3 to 30 MHz) transmitters constructed by hams are generally called QRP`s. For such transmitters a well tuned antenna is a must. If the impedance is not properly matched there will be a little or no output. But if properly matched there will be.... -
On-Glass Antenna Amplifi er AGC IC LA1070 The LA1070 is an Automatic gain control IC for use with automotive on-glass Antennas By Sanyo Semiconductor Corporation .. -
Hello, I am going to try some flat mobile active car atenna`s, with a Terratec Cinergy DT USB XS Diversity digital tuner. The antenna has the.... -
The Johnson 275 watt and Kilowatt Matchboxes are both unnecessarily exaggerated and unnecessarily maligned. They are not exceptional tuners, and are not poor designs. The primary drawbacks are the fixed coupling link, and the fact they are balanced VOLTAGE....
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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.....
This electronic circuit is a simple version of an electronic roulette game and is based on the...
You can save on your electricity bills by switching to alternative sources of power. The...
Anyone who has designed circuits using the 555 timer chip will, at some time have wished that it...
Here is a project of a simple dark detector LED circuit. In the previous topic we have discussed...
Field strength meter circuit is a very useful device for measuring the RF output of any...
Here is the circuit diagram of a guitar preamplifier that would accept any standard guitar...
This is a very nice amplifier design and it is very difficult to improve it. I am glad about...
Thyristors are a class of semiconductor components exhibiting hysteresis, that property whereby a...
The Interfacing Bluetooth module with LPC2148 program is very simple and straight forward, which...
Is it possible to make an op-amp out of nothing but 555 chips and passive components? Not a...
As shown in FIG circuit, T is auto voltage regulator. Its output fixed input end by a servo motor...
Adjustment potentiometer RP, the voltage on the load Rfz Uh set value. By RPz real now closed...
As shown by FIG MAX4450/4451 unity gain line in the driving circuit. MAX4450/4451 has internal...
Automatic telephone responder circuit is shown in Fig. FIG IC2 10 seconds voice recording...
Circuit principle: computers AC power load is large, the use of the current transformer current...