Aviation Band Receiver DIY KIT Airband Radio Receiver for Airplane and Tower

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Aviation Band Receiver DIY KIT Airband Radio Receiver for Airplane and Tower
Item description
Warm tips: this is DIY KIT and you need to solder by yourself.
Features
AM pattern and frenquency between 118 and 136 MHZ, you can receive the signals from the tower and the aircraft with a whip antenna within 5-10 kilometers and signals from the nearby plane beyond 10 kilometers from the airport.
This suite is dedicated to receive calls between aircraft and tower, cooperate with the good performance of the antenna (VHF yagi antenna), making the signal receiving range wider
With general interface, convenient for users to install and change shells. And with detailed English instruction manual to help you DIY easier.
Circuit principle
Antenna to receive signals first enter a bandpass filter, bandpass filter function is to ensure that the 118 MHZ to 136 MHZ signal can be put into CD7358 high, other signal is maximum attenuation. CD7358 internal have a voltage-controlled oscillator at the same time, the frequency changes in D2 junction capacitance, design covers about 120 MHZ to 150 MHZ.
Native intermediate frequency is 10.7 MHz, after CD7358 mixing signal to 10.7 MHz ceramic filter, its function is to filter out irrelevant signals generated by mixing, and then gave CD7613 further intermediate frequency signal and amplification, detection, and the low, and then sent the headphone output.
Among them, the AGC function performed by CD7613.
Component selection
All less than 1000 pf the capacitors for high frequency of ceramics, greater than 1 uf capacitance for aluminum electrolytic capacitors, all resistance is a quarter w 5% fixed resistance.
Main indicators
Power supply: 9-12V
Antenna: 50 ohms, is not balanced
Typical receiving current: 30 ma
Receive frequency: 118 MHZ to 136 MHZ
Working pattern: AM
Packing List
1*DIY KIT of Receiver
Production debugging
Before you install all components all the transistor, resistor, capacitor with a multimeter test again. And then control circuit diagram and the identity of the PCB mounting of all components. General compliance installation sequence of low to high. To install socket in integrated circuit at the same time, this can effectively avoid the core of integrated circuit welding bad. Checked everything is in order, after turn on the juice and the socket insert the headset, put the W2 turn clockwise to the end, should be able to hear white noise. For antenna connected to a soft line of 60 centimeters, can hear the noise significantly larger or hear FM radio, radio frequency (rf) channel basic no problem.
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Free Return Within 30 Days
We provide  return within 30 days
for all items you bought on eBay, full refund and return shipping will be provided.
1-year warranty
is provided for all items(
Excluding: 1. Man-made damage or misuse. 2. Audio accessories and consumables such as vacuum tubes).
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About us
Douk Audio / Nobsound Studio was founded in 2013 in Shenzhen CHINA, we own several brands including
Douk Audio / Nobsound / Little Bear
etc.
As a professional audio company, we are dedicated to design and produce the best products at the lowest prices to make HiFi affordable.
We will spare no efforts to bring great products and service for
customers
and extremely
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improve our customers’ listening experience.
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AM pattern and frenquency between 118 and 136 MHZ, you can receive the signals from the tower and the aircraft with a whip antenna within 5-10 kilometers and signals from the nearby plane beyond 10 kilometers from the airport.