Check the listing for details. Micro-Power Medium Wave Transmitter For Testing Crystal Radio Domestic Use NICE. Condition: New. Listed at 26.10 USD. Description Micro-Power Medium Wave Transmitter Board Assembled For Testing Crystal Radio Domestic Use Video For Radio Sound Performance:Please contact us for it,thanks~ Note: The color of the PCB may vary because of different production lot. Electrical Parameters: - Power Supply: 9V2A DC, 5.5 interface, internal positive and external negative (power supply is not included) - Transmitting Frequency: 530 ~ 1600KHZ (radio medium-wave band) - High-Frequency Transmitting Power: About 500 mW for uses within 5 to 10 meters. - Antenna: 5M 1.5 ~ 2.5 copper wire for home uses - Audio Input: 3.5mm at both ends - Audio Source: CD, desktop computer, mobile phone, etc. - Application: Medium wave radio enthusiasts, for students to study the principle of wireless signal generation and modulation 1: Power Supply (9V. Internal positive & external negative) 2: Audio Input 3: Volume Adjustment 4: Adjust Frequency 5: Adjust Modulation Frequency 6: Antenna Terminal (5M cable for home radio) Audio amplifier circuit outputs sufficient audio power to modulation circuit. With collector modulation, this board features small distortion, adjustable amplitude, and excellent sound quality. It is suitable for radio enthusiasts and students' experiment. Adjust 223 tuning capacitor to change frequency in the range of 530 ~ 1600KHz. Use and experimental radio transmitters are subject to local radio regulations. Please adjust amplitude knob to minimize power. Shipping Terms - For remote regions, we will charge your extra shipping costs. Usually it cost about 35USD-50USD. We will contact you after your payment. Thanks for your understanding. Custom Duties & Taxes 1. Import duties, taxes, and charges are not included in the item price or postage cost. These charges are the buyer's responsibility. 2. Avoiding some unnecessary trouble, please check with your country's customs office to inform us what we should declare its value before shipping.