FM7303 3.0r5 Version Black Finished Circuit Board Stereo Integrated High Sensitivity Frequency Modulation Radio Board

FM7303 3.0r5 Version Black Finished Circuit Board Stereo Integrated High Sensitivity Frequency Modulation Radio Board

Description:
- The FM7303 FM radio kit uses three for TOSHIBA special chips to form the receiving part: TA7358 is a classic FM front-end chip, which is widely used in many radio cassette recorders at home and abroad. TA7303P is a special FM intermediate amplifier and frequency discrimination chip. It is used in many famous models of SHARP radio recorders, such as GF-777z, GF-515z, GF-6060X and GF-9191X. It can also be found in many car radios. TA7061BP is a special intermediate amplifier chip. At present, there is no application case of recorder and radio. TA7343AP is a phase-locked loop stereo decoder. The combination of these four chips and the 2025 power amplifier into a simple circuit can provide high reception performance and is suitable for amateur radio enthusiasts.
- This commodity is used for assembling FM radio circuit board parts, not finished products.
- This product is a circuit board kit, does not include the case and horn, need external power supply and speakers/headphones to listen.
- This product is a pure FM radio kit and cannot be used to receive AM broadcasts.
- This product has perfect function, strong controllability, not a second-hand radio recorder comparable, with a few transistors built by the FM receiving circuit more than.

Features:
- Digital frequency display
- Pointer signal table
- Independent medium chip, high sensitivity, in big cities without antenna can be stable to listen to many stations
- Manually controlled Mute and automatic frequency control (AFC)
- PLL stereo decoding
- With a dedicated intermediate amplifier chip, it has high sensitivity and can listen to many radio stations without pulling out the antenna;
- Digital frequency display is provided to directly display the radio frequency, which can be used as debugging instrument;
- It has a pointer type signal meter, which has a good feeling of use and can be used as a debugging instrument;
- It has Mute function, which is only available for high-end machines, with adjustable Mute sensitivity and can be manually closed;
- Automatic frequency control (AFC) function that can be turned off;
- There is no need to adjust the resolution of stereo decoder;
- 2025 dual channel power amplifier chip is adopted, with high power and sound quality.

Specification:
- Receiving frequency: 88~108MHz FM (FM broadcasting band);
- Stereo demodulation: Yes;
- Power supply voltage: 9~12V;
- Output power: maximum 2W x 2 (8 Ω);
- Main board size: 200mm x 112 mm;
- Finished product size: 203mm x 132mm x 65mm;
- Finished product quality: 257g

Attention:
- The circuit of this kit is assembled according to the official data manual of chip and some classic cases. Practice has proved that it has the advantages of easy production and easy debugging, and the effect is far better than the simple discrete circuit;
- The manual contains circuit schematic diagram and circuit board diagram, as well as debugging methods and experience under amateur conditions, the need for more information and professional debugging methods please buyers download online or refer to the relevant books;
- TA7303P chip has a long history, it is sure that there is no new source of original packaging. What can be obtained are basically disassembled products or stock goods for many years, with old color and oxidation of wax and stitches. The price of these three types of chips sold on the Internet is not low, there are a small number of damaged, the store issued these three types of chips are tested with IC seat, screen in addition to the waste can not be used, can ensure the normal function. In addition to the three chip, the other components in the kit are all new pieces. If you do not accept the chip, please do not shoot;
- Since TA7358, TA7303P and TA7343AP are widely used and there are many compatible models with the same performance, we may replace them with compatible models, such as CD7358, KIA6003S, KIA6043S, etc.
- Capacitors with high stability requirements, such as resonant capacitors, are matched with expensive mica capacitors or NPO series ceramic capacitors. The other capacitors with small capacity are ceramic capacitors or thin film capacitors, and large capacity capacitors (μF) are electrolytic capacitors;
- The variable capacitor uses CBM443DF frequency and amplitude modulation quadruple variable capacitor, and only uses the frequency modulation link;
- The circuit board base is glass fiber material, the thickness is measured about 1.5~1.6mm, single panel green/butter white characters, solder plate spray tin processing, without grinding can be directly welded;
- There may be some scraping marks and dust on the plate base surface and copper foil surface, as well as the marks of washing the plate;
- The circuit board obtained by the buyer may be slightly different from the sample in the picture, mainly due to the change of component position and the unchanged circuit structure. This product has been modified for many times from the trial production sample to the sale of goods (mainly to modify the circuit board wiring), and is still in continuous improvement. It is hereby stated that minor and immaterial modifications, such as slight shifts in component positions or minor adjustments in wiring, will not change version numbers or re-upload photos.

Defect Statement:
- Due to the asymmetry of the two sides of the circuit board (especially the single panel), there will be a slight natural bending, no impact on the normal use;
- Due to the printed circuit board manufacturers to produce multilayer board (double panel and multilayer board), the amateur DIY with the characteristics of a single panel instead of familiar, often put a single panel as a multilayer board to do metallized hole wall processing. General single panel does not need metallized hole wall, but if there is a metallized hole wall is not fatal error, will not cause any impact on the normal work of the circuit, but welding components need more welding power, to increase the temperature of the iron;
- The copper foil of the circuit board and the plate base are bonded by the adhesive, such as a long time, repeated, many times welding hot, will cause the copper foil off;
- Some of the organic film variable capacitor inventory time is long, the shell has gray layer, the lead has oxidation, a little treatment can, does not affect the use;
- Common grade ceramic capacitor (Y5V, etc.) ceramic capacitor (capacity >300pF) error is large, nominal error can reach +80%-20%, temperature stability is not good, suitable for filtering, coupling and other requirements are not high occasions;
- If the magnetic core of the IF transformer and the frequency discrimination coil is located at the end of the trip and still forced rotation, the magnetic cap will be broken, resulting in device scrap;
- At present, IF transformer and discriminating coil are wound by our shop, and their appearance is not as beautiful as factory products;
- At present, there are more than ten versions of the appearance of TEA2025 power amplifier integrated circuit (including compatible models), which are basically domestic products. In the case of output short circuit and overvoltage, the 2025 chip is easy to generate high heat and burn out quickly.

Package Included:
- 1 x 3.0r5 Version Black Finished Circuit Board