Description

 

AMT-MW207 525-1605KHz HiFi AM Transmitter MW Transmitter Finished DIY Circuit Board Radio

Description:
AMT-MW207 MW transmitter is a simple amplitude modulation signal source. It is suitable for amateur electronics enthusiasts and radio enthusiasts. It uses magnetic rods to emit electromagnetic waves without the need for an external antenna. It can be used to test ordinary medium-wave radios as well as crystal radios where the radio signal is insufficient. It can also be used as an instrument for debugging medium-wave radios.

1. This kit adopts full discrete circuit, which is especially suitable for students to learn the working principle, practice production and test;
2. The variable capacitor uses a double-connected variable capacitor, and the two-connection parallel connection can obtain sufficient capacity;
3. Using double-sided circuit, the board base is glass fiber material, the thickness is measured about 1.5-1.6mm (0.06"), the pad is sprayed with tin, and it can be directly welded without grinding;
4. This product has been revised for several times so far (mainly to modify the wiring of the circuit board and the circuit remains unchanged), and it is still in the process of continuous improvement. Usually minor and insubstantial modifications, such as slight movement of component positions and minor adjustments to wiring, will not change the version number, nor will they not be re-photographed and uploaded, hereby declare;
5. The manual contains circuit schematics and circuit board diagrams, as well as debugging methods and experience under amateur conditions. If more information and professional debugging methods are needed, please download or refer to relevant professional books online; mainly changes in component positions, circuit The structure remains unchanged.
6. The transmitter is equipped with a 3.5mm headphone signal cable, excluding batteries.

Advantages:
1. Frequency range: 525-1605KHz
2. Power supply voltage: 6V
3. Board size: 78 x 85mm/3.1 x 3.3" (LxW)
4. Transmission distance: about 1m/3.3ft for superheterodyne medium wave radio, and about 0.5m/1.6ft for direct and crystal radios

Features:
1. The circuit is simple. It is only composed of common triodes and resistance-capacitance inductive components, without audio transformers, which is easy to make;
2. The sound quality is good. Within the rated transmission distance, the sound quality is close to that of FM broadcasting, and the signal-to-noise ratio is good.
3. There is no need for an external antenna (tens of meters for medium wave), and the magnetic field leaked by the magnetic rod affects the receiver, which is easy to implement and the transmission distance is relatively short;
4. There are many interfaces, designed with waveform test terminals, audio sockets, external power sockets, etc., which are easy to use and expand functions;
5. It can be connected to an external power supply or installed with batteries for independent use.

Effect:
This transmitter works well at an effective distance (0.5-1m/1.6-3.3ft). It has a high level of sound fidelity, especially with direct radio (such as our 636 and 68-1 single-pipe units). Listening with our self-made high-resistance dynamic earphones, the sound quality is not much different from the effect of direct playback by the player.

Package Included:
- 1 x MW transmitter
- 1 x 3.5mm headphone signal cable

Note:
- Batteries are not included. 4pcs AA alkaline batteries are recommended.