Check the listing for details. 530-1600khz Medium Wave Transmitter Radio Experimental AM Transmitter. Condition: New. Listed at 37.99 USD. Assembly instructions for experimental AM transmitter Objective: (1) Understand the principle of high frequency signal osci I lat ion of AM transmitter (2)Understand the principle of high frequency signal amp I ification of AM transmitter (3)Understand the modulation principle of AM transmitter Use voltage: 5V-6V Current : 60MA Frequency range: 530~1600KHZ Power consumption: 0.3W External antenna 6M (1/50 wavelength) 75M (1/4 wavelength)(does not includeantenna) Sound quality measurement 1 meter away from the antenna. Not susceptible to interference. Non-directional reception 2-6 meters away from the antenna, there is a directional reception. It may be interfered by household appliances. From the antenna > 6 meters seller unconditional test machine. More than 3 times stronger than the student signal generator signal