Micropower Medium Wave Transmitter
Product Features:
Radio sound:
The parts debugging method:
Note that the component polarity is well soldered; the first step is to turn the tuning capacitor counterclockwise until it can no longer be rotated. The second step is to adjust the above 4 modulation depth.
The potentiometer is adjusted to the midpoint; the third step is to set the radio at 1600 kHz to receive the transmitted signal; at this point, the transmitter can be connected to the power supply,
After that, slowly adjust one of the trimming capacitors on the top of the tuning capacitor until the radio receives the mute letter. (If the debugging fails, it should be heavy.
The new check component is soldered correctly. The audio cable is connected to the audio source, and the normal radio receives the AM signal.
The use of matters needing attention:
Use of this micropower transmitter should avoid local radio stations, do not affect others to listen to the radio, comply with local radio regulations; this machine
For radio enthusiasts only to experiment and test the old-fashioned medium-wave radio, not for other purposes; when the launch distance is more than 5 meters,
The supply voltage is lowered to reduce the transmission power, and the transmission antenna can be shortened to reduce the transmission power.
Electrical parameters:
Power supply: 9V2A DC, 5.5 interface, internal positive and external negative (need to bring your own power supply)
Transmitting frequency: 530~1600KHZ (radio medium wave band)
High-frequency transmission power: adjustable from 20 mW to 500 mW, and the adjustable power is used within 5-10 meters.
Antenna: 5 meters home 1.5~2.5 copper wire
Audio input: 3.5mm at both ends, attached with board
Audio source: CD, desktop computer, mobile phone, etc.
Application: Medium wave radio enthusiasts, for students to study the principles of wireless signal generation and audio modulation of AM transmitters.
Shipping list:
1pcs finished Radio board
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