New Shine Portable AM/FM Antenna Radio DIY kits electronic production suite

AM / FM AM FM Radio Kit ( parts ) HX218B electronic parts productionThe kit has a high sensitivity, stable quality , the sound loud and clear , low power consumption , etc. , Chip IC AM FM radios, is the electronic skills, schools and electronics enthusiasts an ideal teaching and training kit.Each suite is equipped with the factory data (Product description , simple principle , assembly instructio..

Product Code:NS-013

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Each suite is equipped with the factory data (Product description , simple principle , assembly instructions , component lists, schematics, printed version of the circuit and other)The following description is the kind of information real shot :

This DIY radio is good for student to learning electronic.

It is un-assembled so buyer must assembled the component and soldering by yourself.

More Details

Product Information

DIY radio components Details Specifications
integrated circuitCD1691CB(1pc)Light emitting diodered 3(1 pc)
Magnets and coils5*13*55(1 set)Shock coilred (1pc)
Intermediate frequency transformerblack (1 pc)filter10.7m 3 pins (1 pc)
filter455Khz(1 pc)Frequency discriminator10.7m 2pins (1 pc)
Hollow Inductance3*4.5T( 1pc)Hollow Inductance3*4.5T( 1pc)
Speaker0.25W4-16(1 pc)Potentiometer5K(1 pc)
resistance100ohm(1Pc)resistance150ohm(1 pc)
resistance510ohm(1Pc)resistance2.2kohm(1 pc)
resistance100Kohm(1Pc)Magnetic capacitor1P(1 pc)
Magnetic capacitor15P(2Pc)Magnetic capacitor30P(2 pc)
Magnetic capacitor121(1Pc)Magnetic capacitor151(1 pc)
Magnetic capacitor103(3Pc)Magnetic capacitor223(1 pc)
Magnetic capacitor104(4Pc)Electrolytic capacitor10uF(4 pc)
Electrolytic capacitor220uF(2Pc)Electrolytic capacitor4.7uF(4 pc)
Quadruple capacitanceCBM-443PFElectrolytic capacitor10uF(1 pc)
Band switchK2(1Pc)Headphone jack3.5mm CK(1 pc)
Welding3.2M(1Pc)Scale panel1 pc
Tuning dial1pcPotentiometer dial1pcs
Magnetic bar1 pcprinted circuit board1 pc
Battery pole3 pcs (1 set)WiringRed , Black, Yellow(1 pc)
upper cover1pcback cover1pcs
screws8 pcsRod antenna1 pc


Our DIY radio kits a new type of radio FM, AM two band radio, the FM band using the CD9088 chip, which uses patch element SMT package, the receive frequency range of 76-108HMZ, not only to accept the FM radio, can also receive campus radio and part of the audio signal of the television stations; AM band using direct IC the TA7642, receive frequency range is 525-1605KHZ circuit is simple, assembly success rate, a better selectivity having a little;. amplifier circuit using TD2822 special function ICs having loud. Sound quality is good.

Circuit works

1.Frequency Modulation (FM) section

CD9088 is a dedicated single-chip FM radio chip, Its simple external circuit, the circuit was built frequently 70KHZ phase locked loop system, selectively implemented by active RC filter, mute circuit can be suppressed non-IF signal and the IF signal is too weak.

FM signal input circuit rod antenna C8 / C10 and L1 IC1 11, 12 feet into the mixer circuit, local oscillation circuit uses a variable capacitor CA / L2, etc. vitality can be achieved manually tune.

Circuit R2 / C2 to squelch circuit, 3 feet to the audio loop filter capacitor C4. Indirect C13 6,8 feet of the intermediate frequency feedback capacitor, 7 feet is connected to C14 was the low-pass capacitors,between C17 of 8/9 feet is IF coupling capacitor , 10 feet connected to the C12 is a limiting amplifier low-pass capacitors, 13 feet connected to the C6 of the limiter offset voltage capacitors.

2. Amplitude modulation (AM) section

AM band using Direct IC TA7642, TA7642 IC has 10 transistors internal composition, its appearance uses encapsulation mode a TO-92,1 feet grounded, 2 feet input , 3 feet output. Audio signal output from 3 feet, through R6 / C18 is coupled to the input of the power amplifier IC TDA2822 the power amplifier, pushing the speaker working.



Frequency range: 525-1625KHZ

IF: 465KHZ

Sensitivity: <1.5mv

Selective: >20db

Power supply: two AA batteries (kit without batteries).

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