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AM-FM Radio Kit with Campus Radio Reception

Kits   AM-FM Radio   Item Number:     1473516768
AM-FM Radio Kit with Campus Radio Reception$15.95
Item Description 
AM - FM Radio Kit for the electronics student.


This is a new type of radio FM, AM two band radio. The FM band uses the CD9088 chip, which uses patch element SMT package, and the receive frequency range of 76-108HMZ. Not only will it receive the FM broadcasts, but it can also receive campus radio and part of the audio signal of television stations. AM band uses IC TA7642, and the receive frequency range is 525-1605KHZ. Circuit is simple, which makes assembly fairly easy. The selectivity is good and the  amplifier circuit uses the TD2822 special function IC with good Sound quality.

Circuit works:

1. Frequency Modulation (FM) section

CD9088 is a dedicated single-chip FM radio chip.
It uses simple external circuitry, the circuit was built with a 70KHZ phase locked loop system, selectively implemented by active RC filter, and a mute circuit can suppress a non-IF signal and the IF signal that is too weak.
FM signal input circuit rod antenna C8 / C10 and L1 IC1 pins 11 & 12 into the mixer circuit, local oscillation circuit uses a variable capacitor CA / L2, etc..
Circuit R2 / C2 to squelch circuit, pin 3 to the audio loop filter capacitor C4. Indirect C13 pins 6 & 8 of the intermediate frequency feedback capacitor, pin 7 is connected to C14 the low-pass capacitor, between C17 of pins 8 & 9 is IF coupling capacitor, pin 10 connected to the C12 is a limiting amplifier low-pass capacitor, pin 13 connected to the C6 of the limiter offset voltage capacitor.

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, pin 1 grounded, pin 2 input , pin 3 output. Audio signal output from pin 3, through R6 / C18 is coupled to the input of the power amplifier IC TDA2822, the power amplifier pushes to the speaker.

Package includes:

1x AM-FM Radio Kit


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Discount Code:

Manufacturer:   BNG
Mpn:   CER1056663
Condition:   New
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