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4 Transistor Transmitter – Circuit Schematic
4 Transistor Transmitter
This circuit provides an FM modulated signal with an output power of around 500mW. The input Mic preamp is built around a couple of 2N3904 transistors, audio ga...
RF Probe and Watt Meter – Circuit Schematic
RF Probe and Watt Meter
This RF probe can be used at High Frequency (HF) or Ultra High Frequency (UHF) on both 50 and 75 ohm coaxial cables. In addition the RF voltage can be measured ...
Yves OESCH HB9DTX Transceivers modifications – Circuit Schematic
Yves OESCH HB9DTX Transceivers modifications
The original firmware is usable on the amateur radio bands, but is not very convenient to use. Wulf-Gerd, DL1FAC has developped a new firmware that is much more...
early GEC transistor radio – Circuit Schematic
early GEC transistor radio
The world`s first practical crystal amplifying device, in 1948, and the dawn of the commercially available Transistor Radio in Britain. If I had been an average...
Simple Op-Amp Radio – Circuit Schematic
Simple Op-Amp Radio
The following schematic shows the Simple Op-Amp Radio Circuit Diagram taken from bowdenshobbycircuits.info. This Simple Op-Amp Radio is basically a crystal.....
Circuit Diagram of a Crystal Radio Receiver with AF Amplification using a Germanium Transistor – Circuit Schematic
Circuit Diagram of a Crystal Radio Receiver with AF Amplification using a Germanium Transistor
The following schematic shows a Crystal Radio Receiver Circuit Diagram with AF Amplification using a Germanium Transistor. The addition of AF amplification will...
Basic Crystal Radio ReceiverCircuit by Elmer G. Osterhoudt – Circuit Schematic
Basic Crystal Radio ReceiverCircuit by Elmer G. Osterhoudt
A crystal radio receiver is a very simple radio receiver which needs no battery or power source and runs on the power received from radio waves by a long.....
TDA7000 FM Radio Receiver Circuit – Circuit Schematic
TDA7000 FM Radio Receiver Circuit
PARTS LIST C1 0. 22 µF (224) C2 22nF (223) C3 10nF (103) C4 27pF C5 22pF C6 3. 3nF (332) C7 180pF (181) C8 330pF (331) C9 3. 3nF (332) C10 150pF (151) C11 82pF...
Easy Build FM Transmitter – Circuit Schematic
Easy Build FM Transmitter
This is a low cost and easy build low powered FM transmitter. The range of the FM transmitter claimed about 300 feets when running at 9V supply. And the range c...
AM Transmitter – Circuit Schematic
AM Transmitter
This is AM transmitter schematic diagram. The circuit is in two halfs, an audio amplifier and an RF oscillator. The oscillator is built around Q1 and associated...
AM Radio Receiver – Circuit Schematic
AM Radio Receiver
This is the circuit diagram of mini AM Radio receiver. All general purpose transistors should work in this circuit, you can use BC549 transistors for this circu...
4 Watts FM Transmitter – Circuit Schematic
4 Watts FM Transmitter
The following diagram is the FM transmitter circuit with FM transmision up to 4W. Voltage supply for this circuit is 12-16V with current consumption of 100-400m...
3V FM Transmitter – Circuit Schematic
3V FM Transmitter
3V FM Transmitter Circuit This project provides the schematic and the parts list needed to construct a 3V FM Transmitter. This FM transmitter is about the simpl...
2W RF Amplifier with MOSFET LF2810A – Circuit Schematic
2W RF Amplifier with MOSFET LF2810A
This is a 2W RF amplifier circuit build with power MOSFET LF2810A. Figure A Figure A is the schematic of the microstrip single stage RF amplifier. The amplifier...
1.3W RF Amplifier – Circuit Schematic
1.3W RF Amplifier
This diagram is a schematic diagram of RF amplifier circuit. The circuit will amplify the RF signal about times, 100mW input power to 1.3W output power. It use ...
UHF TV Antenna Booster – Circuit Schematic
UHF TV Antenna Booster
This is the circuit diagram of UHF band TV antenna booster with 15dB gain power. This low cost antenna booster is simple and easy to build. This circuit formed ...
FSK Filter circuit – Circuit Schematic
FSK Filter circuit
FSK or Frequency-Shift Keying is a form of frequency modulation in which the modulating signal shifts the output freq. between predetermined values. If problems...
FM Booster~Active FM Antenna Amplifier – Circuit Schematic
FM Booster~Active FM Antenna Amplifier
FM Booster, Active FM Antenna Amplifier This FM booster that can be used to listen to programmes from distant FM stations clearly. The circuit comprises a commo...
SR 6m/2m Converter – Circuit Schematic
SR 6m/2m Converter
This kit, designed by Jan G0BBL and implemented and distributed by Tony KB9YIG, is a plug-in board for the Softrock Lite + Xtall RX V9. 0 which down-converts VH...
mobo43 – Circuit Schematic
mobo43
The Motherboard, or Mobo v4. 3. 4 BETA, is an addon board to plug onto the Softrock v6. 3 RxTx, to transform it into an all band (160-10m) HF transceiver electr...