Finished 3P5 Super Dynamic Wide Band Response 3-Band Amplitude Modulation Radio Receiver DIY Replacement for Chunlei 3P5

Finished 3P5 Super Dynamic Wide Band Response 3-Band Amplitude Modulation Radio Receiver DIY Replacement for Chunlei 3P5

Description:
- Using TDA2030A power amplifier, with 12V power supply and wide adaptability of power supply voltage, its power amplifier output is undistorted, with higher power and beautiful sound quality. The layout of the amplifier has been optimized and modified, and all coil parameters of the shortwave have been re optimized and designed, resulting in improved overall performance. Its sensitivity, selectivity, and static noise are all superior to previous versions.

Features:
- The short wave oscillation adopts second harmonic generation, with one local oscillator used for two short waves. The short wave oscillation frequency is set at 4.965MHz-9.465MHz, which is higher than the intermediate frequency of 4.5MHz-9MHz for short wave I. The short wave II 9-18MHz adopts local harmonic generation and series local oscillator pad capacitors, so that the second harmonic generation of the short wave oscillation is adjusted by the pad capacitor to have a frequency higher than the intermediate frequency of short wave II. This processing reduces the complexity of the circuit without affecting performance.

- Adopting the input circuit of Chunlei 3P5 and the tuning mode of oscillation, a 270P × 2 dielectric variable capacitor is used to overcome the disadvantages of large volume, high price, and limited supply of air variable capacitors.

- Adopting a new type of pin type band switch, the band switch and connecting wires are directly made on the circuit board, overcoming the tedious and complex wiring of the original band switch, making it easy, fast, and accurate for DIY users to install.

- Equipped with pin headers, short-circuit caps, and fine tuned resistors. It is possible to quickly adjust the bias current without flipping the circuit board. After testing and adjusting the current, insert the short-circuit cap of the pin bank into the pin bank to connect the circuit, without the need for soldering the circuit breaker.

- All resonant capacitors are made of high Q-value single stone capacitors or domestically produced old models of mica capacitors, ensuring the sensitivity and stability of the entire machine.

Actual Using:
- Powered by a 6V battery, it has a distortion free power of up to 1.5W, with clear high frequencies and rich low frequencies. Especially, the medium wave can be compared to desktop FM radios, and in the testing receiving location in Yueyang, Hunan, the medium wave can receive nearly 30 radio signals, which is much more sensitive than ordinary radios. The medium wave and two short wave signals are also densely packed in certain periods of time. Due to the use of a 6V battery power supply, its anti-interference performance is significantly better than that of AC powered radios.

Package Included:
- 1 x Radio Receiver

Note:
- It is assembled and ready to use.