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Radio Receiver Antenna Amplifier – Circuit Schematic
Radio Receiver Antenna Amplifier
Here is a high performance radio receiver antenna amplifier for the entire VHF broadcast and PMR band (100-175 MHz) which can be successfully built without.....
FM Radio Receiver Antenna Booster Circuit – Circuit Schematic
FM Radio Receiver Antenna Booster Circuit
This inexpensive FM radio receiver antenna booster uses the BF324 TO92 style pnp transistor in a grounded-base configuration. The circuit may be used as a.....
VHF FM Antenna Booster Circuit – Circuit Schematic
VHF FM Antenna Booster Circuit
Together with a good directional antenna this high performance two-stage antenna amplifier for the VHF FM broadcast band will enable you to capture far removed ...
MAX2606 VHF FM Transmitter – Circuit Schematic
MAX2606 VHF FM Transmitter
To be independent of the local radio stations for testing VHF receivers, you need a frequency-modulated oscillator that covers the range of 89. 5 to 108 MHz ”...
Simple 144 MHz RF Detector – Circuit Schematic
Simple 144 MHz RF Detector
This simple circuit helps you sniff out RF radiation leaking from your transmitter, improper joints, a broken cable or equipment with poor RF shielding. The tes...
UHF Indicator - Wavemeter – Circuit Schematic
UHF Indicator - Wavemeter
UHF indicator or wavemeter is some kind of device that measures frequencies and determines LC circuit frequecy resonance. This device does not need to radiate. ...
VHF to AM Converter Circuit – Circuit Schematic
VHF to AM Converter Circuit
There are many people who want to listen whats going on in VHF 108 - 132 MHz. This vhf am converter converts a band between 106 and 150 MHz, so you can lis.....
Basic low power AM transmitter – Circuit Schematic
Basic low power AM transmitter
This transmitter is basic but allows transmission of audio to an AM radio. It consists of an RF oscillator operating in the AM broadcast band, together with a m...
PC FM Radio Circuit – Circuit Schematic
PC FM Radio Circuit
If you know some language of programming as C +, PASCAL, VISUAL BASIC, DELPHI etc you can write a program which will send in the parallel door (378 I) of PC a n...
RF Probe Circuit – Circuit Schematic
RF Probe Circuit
A RF probe is a circuit for testing equipment that converts a high frequency signal into a DC voltage. In this way it is very easy to measure RF voltages for ei...
Sensitive FM Radio Tuner Circuit – Circuit Schematic
Sensitive FM Radio Tuner Circuit
This sensitive FM radio tuner is the right circuit for hobbyists who want to build their own tuners instead of buying a ""plug-n-play"" finished product. The.....
Two transistor AM radio receiver circuit – Circuit Schematic
Two transistor AM radio receiver circuit
This two transistor AM radio circuit is also called ""mini-radio"". It uses only 2 transistors and few passive components which makes is very easy to be cons.....
FM Radio Receiver Circuit – Circuit Schematic
FM Radio Receiver Circuit
This simple fm radio receiver circuit consists of a regenerative rf stage, TR1, followed by a two of three-stage audio amplifier, TR2 to TR4. In some areas.....
FM Transmitter Circuits - Best Of – Circuit Schematic
FM Transmitter Circuits - Best Of
Maxim now has available a series of five integrated oscillator building blocks in the MAX260x series which cover the frequency range between 45 and 650 MHz. The...
1 Watt FM Amplifier Circuit – Circuit Schematic
1 Watt FM Amplifier Circuit
This is a 1 watt fm amplifier with a good design that can be used to amplify a rf signal in the 88 - 108 MHz band. It is very sensitive if you use good rf.....
SMD FM Transmitter Circuit – Circuit Schematic
SMD FM Transmitter Circuit
Let`s construct a low-power FM transmitter using surface-mount devices (SMD) that will be received with a standard FM radio. Soldering surface mounted devi.....
Small FM Radio Circuit – Circuit Schematic
Small FM Radio Circuit
Perhaps this is one of the simplest and smallest FM radio receiver that can receive the FM stations available locally. Its simple design makes it ideal for.....
FM Antenna Amplifier Circuit – Circuit Schematic
FM Antenna Amplifier Circuit
With this technique, an extra cable to power the fm antenna amplifier is unnecessary. The RF signal and the DC current supplying the amplifier use the cable sim...
Foxhunt FM Transmitter Circuit – Circuit Schematic
Foxhunt FM Transmitter Circuit
This 2 meter 144 MHz fox hunt transmitter is used in amateur competitions where a hidden transmitter is to be ""hunted"" using mostly homebrewed receivers an.....
FM Receiver Circuit – Circuit Schematic
FM Receiver Circuit
Sometimes I can find a station and sometimes I can`t find any stations. Probably the main problem when tuning is, as soon as you move your hands or body, let go...