How to make an ore radio, trouble details

You'll need: a baseplate or chassis (you can do this or not, depending on whether you want to save the work better), a skeleton (used to wind coils, you can use toilet paper tubes), a variable capacitor, a normal capacitor (2200 picofar), a high-impedance headset (note, high-impedance, must be high-impedance!). Otherwise, it won't be silent, you can use ceramic speakers), an ore (for detection, it's hard to buy now, you can try 2AP9, 1N60 diodes), and a lot of wires, some enameled wires (which can be removed from waste coil ballasts and transformers).

These are available in the electronics market, and when they are ready, they can start working.

Step 1: Wrap the coil with enameled wire on the paper tube, ninety turns, you can drill an hole at the head and tail, thread the thread through, and glue it with tape. Then carefully remove the lacquer from the enameled wire, which can be sandpapered.

Step 2: Connect the variable capacitor on both sides of it, be sure to determine the two poles of the capacitor, don't be wrong, if you have a multimeter, it is best to measure it, the mutual resistance is infinite, it is the two poles of the capacitor, you can use an electric soldering iron with rosin solder to solder it, more firmly.

Step 3: Connect the random pole of the diode to the random pole where the variable capacitor is connected to the coil.

Step 4: Connect the high-impedance headphones to the other pole of the diode and the other pole of the variable capacitor (without the first stage of the diode).

Step 4: Connect the capacitors to the poles of the high-impedance headphones, the 2200 picofar.

Step 5: Connect the antenna at the place where the variable capacitor, diode, and coil are connected, which is a piece of wire, the longer the better, and the more units are received, the shortest is two meters. Connect the ground wire where the variable capacitance, high-impedance headphones, and coils are connected.

Step 6: If you live in a building, connect the ground wire to the heating pipe, water pipe and the like, put the antenna outside, if it is a bungalow, bury the ground wire in the ground, you can first insert a section of water pipe in the ground, bury it half a meter deep, and then connect the ground wire and try to raise the antenna as high as possible.

Step 7: Put on the headphones and listen to it, turn the variable capacitor, and listen to whether there is a radio station?

The simplest ore machine only needs an ore geophone (or crystal diode) and a pair of high-impedance headphones, with a simple ground and earth cable to listen. But this kind of ore radio has no tuning function, and all the radio stations are mixed together, which is not of high practical value.

The addition of a tuning coil and a variable capacitor can realize the function of selecting different stations, so that there is the ability to actually listen.

At this point, the simple ore radio already has a certain practical function. Because there are more radio stations in various places at present, and the signal strength of the radio stations is also very different, and the ore radio on it cannot clearly separate the neighboring radio stations because of its poor selectivity, so when there are more radio stations in the city or want to listen to weak stations with similar frequencies near strong stations, this radio can not meet the requirements.

Because of the above reasons, the ore radio with multiple tuning loops has also come out, that is, adding a tuning loop to the ore radio with only one tuning circuit and controlling the degree of coupling between the two circuits can meet the listening requirements in most cases.

The key to an ore radio is first and foremost to set up a set of antennas that perform as well as possible, and then to find a way to buy a pair of headphones that perform as well as possible. Other components such as coils, variable capacitors, and diode detectors are not difficult to collect. After these conditions are met, it is not impossible to receive a radio station hundreds or even thousands of kilometers away in the early morning and dusk and at night with an ore machine.

Now that ore radios have entered the use of field-effect devices as detectors, the use of these new devices has lowered the initial threshold of ore detectors and diode detectors a lot (even close to 0V), and many inaudible signals can be heard clearly through the synchronous detection provided by such devices. Of course, as an ore radio, these devices are beyond the scope of ore detectors, but they must be driven by the signal energy without using an external power supply!

to get the latest research results. Because there is a lot of actual information and ** here, I won't stick it up.

The ore radio circuit diagram and how to make it are as follows:

Material preparation: paper tube, coil, tape, frosted paper, transformer, diode, electric soldering iron, which oak water tube.

The operation is as follows: 1. Circuit diagram:

Second, the specific steps:

1. Wrap the coil with enameled wire on the paper tube, ninety turns, you can drill an eye at the head and tail, pass the thread through, glue it with tape and then carefully remove the paint of the enameled wire, which can be sandpaper-polished.

2. Connect the variable capacitor on both sides of it, be sure to determine the two poles of the capacitor, don't be wrong, if you have a multimeter, it is best to measure the mutual resistance to infinity is the two poles of the capacitor, you can use an electric soldering iron with rosin solder to solder it on the ruler to make it more firm.

3. Connect the random pole of the diode to the random pole connected to the variable capacitor and the coil.

4. Connect the high-impedance earphones to the other pole of the diode and the other pole of the variable capacitor (the first stage without the diode).

5. Connect the antenna at the place where the variable capacitor, diode, and coil are connected, which is a piece of wire, the longer the better, and the more stations are received, the shortest is two meters. Connect the ground wire where the variable capacitance, high-impedance headphones, and coils are connected.

6. If you live in a building, connect the ground wire to the heating pipe and water pipe, put the antenna outdoors, if it is a bungalow, bury the ground wire in the ground, you can first insert a section of water pipe in the ground, bury it half a meter deep, and then connect the ground wire and then try to raise the antenna.

7. Put on headphones and listen to the tomb, turn the variable capacitor, and listen to whether there is a radio station.

Ore radio is a kind of microphone composed of only a simple antenna, ground wire and ore, it only needs to do the basic tuning loop, no circuit passive radio, only a simple radio receiving device, used in the reception of medium wave public radio broadcasting, and there is only one semiconductor element in the circuit, so what about the ore radio? How to make your own ore radio?

1. How about the ore radio.

1. Advantages. Ore radio does not need to use power supply, very energy-saving and environmentally friendly, can be used to test the efficiency of the antenna or ground wire, is very simple and easy to understand, especially for some children or beginners with strong hands-on ability, it is very bad to call fun, but also to learn some simple line knowledge, simple production, connected to the amplifier, you can also listen to the best sound quality AM radio.

2. Disadvantages. The ore radio is simple, which means that the function is also simple, its volume will be relatively small, and it also needs a long antenna to have a better signal, and it also needs the cooperation of the ground wire when installing.

2. How to make your own ore radio.

1. Prepare materials.

Since you want to do it, make a better one, keep it for a longer time, prepare some materials, prepare a base plate chassis, a skeleton, a variable capacitor, a 2200 picofaric ordinary capacitor, a high-impedance headphone, an ore or 2AP9 and 1N60 diodes, wires, enameled wires, etc.

2. Production steps.

The first step: Wrap the enameled wire into a neat coil on the paper tube, that is, the skeleton, about 90 circles, drill a hole at the head and tail, and use sandpaper to remove the paint after the thread is glued with tape;

Step 2: Connect the variable capacitor on both sides, determine the two poles of the capacitor, you can measure it with a multimeter to see if the mutual resistance is infinite, and soldering it with an electric soldering iron and rosin solder will be firmer;

Step 3: Connect one pole of the diode to the first stage of the capacitor and coil, and connect the high-impedance earphones to the other pole of the diode and the other pole of the variable capacitor respectively;

Step 4: Connect the variable capacitor, high-impedance headset and coil to the ground wire, high-rise can choose to connect to the heating pipe and water pipe, and set the antenna outdoors, if the home is a bungalow, you can bury the ground wire in the ground, but first insert a section of water pipe in the ground, bury it in a depth of half a meter, and then connect the ground wire and raise the antenna;

The fifth envy step: At this time, it is basically made, you can put on headphones and listen to it, turn the variable capacitor, and see if there is a radio station.

The principle of the ore radio is actually an antenna loop, and after tuning, it receives the ore detection, so as to promote the radio listening.

Ore radio originated from the early geophone element is directly made of natural ore, usually used clump cherry ore is pyrite crystal, when using a metal probe to contact the ore a point the size of a pintip, adjust its contact point on the ore can find the contact point with semiconductor effect, use the semiconductor effect of the point, the amplitude modulation radio wave into the key bank detection, so as to obtain the audio signal.

Ore radio referred to as mining machine, it refers to the antenna, ground wire and ore as a geophone and composed of passive radio without amplification circuit, is a particularly simple radio receiving device on Shi Yu Liang Cong, and it is precisely because of the ore directly used in the original geophone in the early days, so it was named ore radio, after the transistor was invented, those radio enthusiasts gradually adopted germanium diodes to replace ore.

Advantages and disadvantages of ore radios

The advantage of the ore radio is that it does not require the use of a power supply, it is very energy-saving and environmentally friendly, and it can also be used to test the efficiency of the antenna or ground wire, which is very simple and easy to understand. For those radio enthusiasts, the ore radio is attractive and can be made by yourself to help you learn more about simple wiring. In addition, when the ore radio is connected to the amplifier, people can hear better sound quality broadcasts.

However, there are also disadvantages of ore radios, because they are easy to make, their functions will be simple, the volume is not large, and they also need a long antenna to receive a better signal.

I'm sure you're no stranger to radio, but have you ever heard of ore radio? So what is an ore radio? What about ore radios? I'm sure everyone is curious! Let's find out together!

What is an ore radio.

Ore radio refers to the passive radio without amplification circuit composed of antenna, ground wire and basic tuning loop and ore as geophone, it is the simplest radio receiving device, mainly used for the reception of medium wave public radio broadcasting. It is customary to refer to radios that do not use power and have only one semiconductor component in the circuit as "ore radios". Because ore was originally used as a geophone, hence the name.

How about the ore radio.

Ore radios are a general term for radios that do not use buried power and have only one semiconductor component in the circuit. Ore radio refers to the passive radio without amplification circuit composed of antenna, ground wire and basic tuning loop and ore as a geophone, and the ore radio is the simplest radio receiving device, because it was originally used as a geophone with ore, so it is named. Ore radios are mainly used for the reception of medium-wave public radio broadcasts.

A simple ore radio can be composed of only one coil, a variable capacitor, a geophone and a headphone, and is called a "single-loop ore radio" because there is only one tuning circuit.

Advantages and disadvantages of ore radios

Advantages of ore radios.

1. No need for power supply, energy saving and environmental protection.

2. It can be used to test the efficiency of the antenna or ground wire.

3. The ore machine is very attractive, and can be used to guide beginners and children into the world of radio, radio and DIY.

4. The line is simple and easy to make.

5. Connect the power amplifier and listen to the AM broadcast with the best sound quality.

6. It can be used for life, and the maintenance cost is exempted.

Disadvantages of ore radios.

1. The volume is low.

2. You need a very long (five or six meters) antenna, and you also need a ground wire.

The principle of the ore radio.

The ore radio is an antenna loop, which is tuned to connect to the ore detector and then push the headphones to listen. In places where the radio signal is strong, it is also possible to use a highly sensitive reed speaker to play a sound curved sound. Why is it called "ore radio", this is because the ore radio is in the microelectronics technology has not yet developed, just or when the semiconductor appeared, people according to the principle of semiconductors, with two different materials of ore to form a pn junction to make the simplest diode, and use this diode to filter, so it is called ore radio.

In a relatively simple radio environment, a long antenna senses a radio signal and filters out the sound. The above is the relevant introduction to the ore radio, I believe you have also understood this, I hope it will be helpful to you.