Fm demodulator

The NE564 is used as an FM demodulator. The connections for operation at 5 V and 12 V are shown in Figures 21-4A and 21-4B. The input signal is ac coupled with ...

Am demodulator

Amplifying and limiting of the AM carrier is accomplished by the if gain block providing 55 dB of gain or higher with a limiting of 40 µ\. The limited carrie...

Narrow band FM demodulator

For FM demodulation applications where the bandwidth is less than 10% of the carrier frequency, an XR-J567 can be used to detect the presence of the carrier sig...

100 Mhz converter

The 2N4416 JFET will provide noise figures of less than 3 dB and power gain of greater than 20 dB. The JFET's outstanding low crossmodulation and low intermodul...

UHF TV Linear Amplifier (450-800MHz)

This structure is an amplifier RF, covering the range of UHF and intended for small TV transmitters, working in the channel UHF. The amplifier can enhance any v...

FM transmitter microphone

An op-amp IC (741) amplifies the audio signal from MIC1, and R12 controls its gain. Audio is fed to the oscillator circuit Q1 and related components. D2 is a va...

Crystal Radio II

Nice Crystal Radio with 1N34A Germanium Diode....

AM-FM-TV RF AMPLIFIER

The circuit is a universal amplifier that can amplify any rf signal. You can use the BF194 or the BF198. Make sure you use coaxial cable....

Short wave radio for PC

This Cheap circuit will amaze you with its wide range recieving signal between 6 and 17Mhz (49-19meters). Power supply is not necesery, just connect it to your ...

TV signal amplifier 470Mhz-860Mhz

This amplifier can amplify to 10dB the RF signal from antenna working as class A and is based on transistor BFQ34 of Philips. The transistor comes in case SOT12...

Quality FM-TV micro transmitter 40-200 Mhz

This Transmitter can be powered by a battery 9V (not more than 12V). You can connect your music source where the microphone is or use a simple condenser microph...

FM radio with TDA7000

An FM radio on a single chip requiring only a few simple peripheral components. In particular the ship requires only one simple coil and alignment is very easy....

AM reciever with TDA1072A

This reciever uses the TDA1072A which is a complete AM reciever on a chip and it only requires comparitively few peripheral components to complete a high qualit...

FM IF Subsystem with CA3189E

TheCA3189E is a comprehensive FM-IF system designed for high fidelity FM tuners. It includes a three stage FM-IF amplifier/limiter configuration with level dete...

Antenna tunning circuit for 27MHz CB band

The antenna tunning circuit can accommodate 1/2 wave length antennas or higher, for input resistances of 50 Ohms which make it suitable for CB (Citizen Band) ...

Active Antenna Circuit for 10KHz to 100MHz

This active antenna schematic can be used to frequency range from 10 KHz to 100 MHz. The length of the Antenna can be between 0.5 to 1 meter long. The power co...

Active Antenna for 10 to 30 MHz

The schematic shown, is a 2 transistor signal amplifier between 10 MHz to 30 MHz. The BF256C and the BF494 are very popular transistors and are easy to find. Th...

Tunable Crystal radio circuit

This is a very simple crystal reciever circuit for short wave band and can be used with headphones....

AM Radio Receiver schematic

Pictured above is a little AM superhetrodyne receiver that covers the broadcast band from 550 Khz to 1650 Khz. The circuit employs the 8 pin Signetics balanced...

AM loop antenna project

A loop antenna can greatly improve medium wave reception. Loop antennas are directional and receive signals along the plane of the windings. The directional q...