Vintage RC Airplane Receiver Tested and 100% working Great Condition (Pictures are of the actual receiver).
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High-Frequency Modulation: Sound capacitors and bias resistors for sound modulation. Transmitter Frequency: 530-1600kHz (AM radio band). Filter Network: Low-pass network filters out high-order harmonics and achieves a sinusoidal waveform.
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Frequency range: 525~1605kHz. 2pcs BNC Female to UHF Male Coax Cable Connector Repair For PL-259 Converter. 1 x Transmitter. 12V POE Adapter Cable Cord RJ45 Injector Splitter Network Power over Ethernet.
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High-Frequency Modulation: Sound capacitors and bias resistors for sound modulation. Transmitter Frequency: 530-1600kHz (AM radio band). Disassembled Parts: Includes pre-assembled components on the mainboard and audio cables.
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The circuit is simple. It is only composed of common triodes and resistance-capacitance inductive components, without audio, which is easy to make; The sound quality is good.
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The output power is nominally 5 milliwatts into 50 ohms. The range is generally only a few feet depending on what is used as an antenna. This is not intended to be a long range radio transmitter. The output is fed through a pi attenuator so that the modulator can feed into any load without affecting the modulation characteristics.
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High Frequency Oscillation: 21MHZ high frequency oscillation, crystal Y1 in the circuit is a parallel resonance, equivalent to the inductor. Structure: Mainly consists of power input, sound amplification, sound modulation, 21MHZ high frequency oscillation, Class C high frequency amplification, 21MHZ low pass filter.
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Transmitter Frequency: 530-1600kHz (AM radio band). Filter Network: Low-pass network filters out high-order harmonics and achieves a sinusoidal waveform. Finished Board: Ready to use upon power-up, audio cables included.
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