CXA1691BM_BP machine type FM radio kit
Product code: B91Jt
The receiver is a kit, you need to weld and debug by yourself, the kit has a matching shell!Our kit products only provide paper materials, not electronic documents, please forgive me!
The classic CXA1691BM FM mono receiver kit helps to learn and master the knowledge of frequency-frequency-modulation-mono reception, and to understand the working principle of the FM receiver integrated circuit with electronic volume control power amplifier. It is easy to make and simple to debug.
![](https://img.alicdn.com/imgextra/i2/12672811/TB2FNqaapXXXXaMXpXXXXXXXXXX-12672811.jpg)
The following are the matching shells and earphones:
![](https://img.alicdn.com/imgextra/i2/12672811/TB2nDGjapXXXXcRXXXXXXXXXXXX-12672811.jpg)
![](https://img.alicdn.com/imgextra/i1/12672811/TB2JOWlapXXXXXGXXXXXXXXXXXX-12672811.jpg)
The volume of the receiver is only the size of a BP machine.Belt buckle,The overall size is 8X5.5X1.5cm,Receiving integration adopts CXA1691BM(Or CD1691CB), Including a 9018 high frequency(antenna)Amplifying circuit, this machine has high sensitivity, good sound quality, and automatic frequency control(AFC)Function, after receiving the station, it can automatically track the frequency change of the transmitter within the range of about 0.5MHZ. This function is helpful to lock the frequency of the transmitter, even if the transmitter has a slight frequency change, it can still lock the frequency of the transmitter to make it as a whole The performance is superior. This machine can be matched with an FM transmitter to form a wireless audio system or a wireless monitoring system, or it can be used alone to receive FM broadcasts. The machine is powered by 2 AAA batteries. The supporting circuit schematic diagram, installation diagram, detailed principle description and debugging Description,MatchSet of headphones, the headphones are ordinary headphones, such as self-changing high-end headphones can make the sound quality better.Default receiving frequency(85-110MHz)Continuously adjustable.It can also be debugged out of this section by itself.The headphone port can be connected to external amplification equipment or recording equipment.
The following is the supporting circuit schematic diagram and the thumbnail of the installation diagram. The actual delivery is paper and clearer:
![](https://img.alicdn.com/imgextra/i3/12672811/TB2mcXtapXXXXXyXXXXXXXXXXXX-12672811.jpg)
![](https://img.alicdn.com/imgextra/i2/12672811/T2MN2.XtJaXXXXXXXX-12672811.jpg)
instructions:
![](https://img.alicdn.com/imgextra/i3/12672811/T2bX3aXvBXXXXXXXXX-12672811.jpg)
The picture of the finished board after installation is as follows:
![](https://img.alicdn.com/imgextra/i2/12672811/T225_UXlxXXXXXXXXX_!!12672811.jpg)
The picture of the finished machine after installation is as follows:
![](https://img.alicdn.com/imgextra/i2/12672811/TB2qD7eaXXXXXcvXXXXXXXXXXXX-12672811.jpg)
The following is related product information:
If you want to buy a circuit board(PCB board)Please click on the following link:
http://item.taobao.com/item.htm?spm=a1z10.5.w4002-2498222905.21.FEQuTS&id=7812448557
If you want to purchase the finished boards in single order, please click the following link:
http://item.taobao.com/item.htm?spm=a1z10.5.w4002-2498222905.40.P0ZSYs&id=3733382637
If you want to buy a finished machine,Please click on the following link:
http://item.taobao.com/item.htm?spm=a1z10.5.w4002-2498222905.29.cOtSIc&id=3130288819