Use STC8H1K17 single-chip microcomputer as the main control, built-in PLL local oscillator, covering 3-23MHz, self-contained frequency indication circuit (using 7-segment digital tube, the display unit is 1KHz, the photo has color difference, the actual color is red), stepping supports automatic flying .The kit adopts the scheme of TA2003 mixing frequency + TA7613 medium/low amplifier, super heterodyne structure, intermediate frequency 10.7MHz. Our code, on-board digital control volume potentiometer, supports automatic saving of configuration, and supports adjustment of IF frequency and crystal oscillator frequency.12V power supply, the PCB board size is 71x100mm, which can be conveniently placed in an aluminum chassis of 76x35x100mm. Unmatched Sensitivity and Versatility: The R10 Short-wave PLL Receiver is a DIY kit designed for the discerning radio enthusiast. With a frequency range spanning from 3 to 23MHz, this receiver is a versatile tool for amateur radio operators and shortwave listeners alike. The high sensitivity ensures that even the faintest signals are captured, making it an ideal choice for those who enjoy exploring the vast spectrum of radio frequencies. Ease of Use and Customization: The R10 Short-wave PLL Receiver is not just a radio; it's a platform for DIY enthusiasts to build and customize their own radio experience. The kit comes with an electronic version of the manual, which can be accessed via a provided. Although the kit requires soldering and debugging, it is designed for users with technical expertise to a successful installation. Advanced Features for the Radio Enthusiast: The R10 Short-wave PLL Receiver is more than just a radio; it's a tool for the radio enthusiast. It features the STC8H1K17 single-chip microcomputer as the main control, with a built-in PLL local oscillator that covers awide range of frequencies. The on-board digital control volume potentiometer supports automatic saving of configuration, allowing users to customize their listening experience. The IF frequency and crystal oscillator frequency can also be adjusted, providing a level of customization that is unmatched in its class. With its high sensitivity and advanced features, the R10 Short-wave PLL Receiver is a must-have for anyone serious about radio. Different factory batches may have slight differences in appearance, which will not affect the applicability Power Supply: DC12V Frequency Range: 3-23MHz Sensitivity: High Control: Digital control volume potentiometer Size: 71x100mm PCB board, suitable for 76x35x100mm aluminum chassis Colour:Black Material:plastic Package Contents: 1 x Shortwave Radio Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.