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USB FM Transmitter for MP3 Player – Circuit Schematic
USB FM Transmitter for MP3 Player
This MP3 Player FM transmitter can be used to listen to your own music throughout your home. The transmitter circuit use no coils that have to be wound. When th...
Corsair and Commando TXs – Circuit Schematic
Corsair and Commando TXs
All about the famous Corsair and Commando Transmitters designed by Dave Martin of WNKR. This blog will show you how to make each of the transmitters and show yo...
Frequency Modulator and Tuning Circuit – Circuit Schematic
Frequency Modulator and Tuning Circuit
Here`s a design circuit for frequency modulator that is completed with tuning circuit. In this circuit is using pair of 1N4007s are used as varactor diodes. I p...
MAX2664/MAX2665 VHF UHF Low Noise Amplifiers Circuit – Circuit Schematic
MAX2664/MAX2665 VHF UHF Low Noise Amplifiers Circuit
Here`s a design circuit for very simple low cost and ultra compact VHF UHF Low-Noise amplifiers circuit can be designed using the MAX2664 and MAX2665 ultra-comp...
FM Transmitter Circuit Type Versatile – Circuit Schematic
FM Transmitter Circuit Type Versatile
This is a design circuit diagram of a versatile FM transmitter. This circuit doesn`t have a coil. The circuit is simple and easy to assemble. This circuit is wo...
15dB UHF Antenna Preamp Circuit – Circuit Schematic
15dB UHF Antenna Preamp Circuit
This is an UHF band TV antenna preamp circuit with 15dB gain and build by a transistor. It is formed based on BF180 UHF Transistor. This circuit is a simple cir...
TV Transmitter circuit diagram (VHF) – Circuit Schematic
TV Transmitter circuit diagram (VHF)
Most of people ask TV transmitters. So Today I`m going to give you a very useful circuit diagram. By using this circuit you can send your signals 75m to 100m. T...
Simple radio circit diagram – Circuit Schematic
Simple radio circit diagram
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Mini FM Transmitter – Circuit Schematic
Mini FM Transmitter
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FM Transmitter Bug – Circuit Schematic
FM Transmitter Bug
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Spy FM Transmitter circuit – Circuit Schematic
Spy FM Transmitter circuit
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Versatile FM Transmitter – Circuit Schematic
Versatile FM Transmitter
The gate N1 acts as a buffer for strengthening the signals from the condenser microphone. The inverter N2 with its associated components forms a radio frequency...
Understanding FM transmitter circuit – Circuit Schematic
Understanding FM transmitter circuit
Wireless FM Transmitter. The site has some explanation on how the circuit works, however I`m not sure about a few things, including the electret mic & how the f...
Circuit diagram 500mW FM PLL transmitter 88-108MHz using LMX3206 and PIC16F870 – Circuit Schematic
Circuit diagram 500mW FM PLL transmitter 88-108MHz using LMX3206 and PIC16F870
This oscillator is called the Colpitts oscillator and voltage controlled to achieve the FM (frequency modulation) and PLL control. T1 must be HF transistors to ...
Two Transistors Wireless Microphone FM Transmitter Circuit Schematic Diagram – Circuit Schematic
Two Transistors Wireless Microphone FM Transmitter Circuit Schematic Diagram
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Schematic diagram for the One Transistor FM Radio with Improved Audio Gain – Circuit Schematic
Schematic diagram for the One Transistor FM Radio with Improved Audio Gain
Connect the two sections of the variable capacitor (C3) in series to linearize the tuning somewhat. That is, use the connections on either end of C3 and don`t u...
Low cost fox hunting setup – Circuit Schematic
Low cost fox hunting setup
I'm interested in seeing if I can create an antenna rig that can be used with my ht for fox hunting. Anyone have any suggestions? Cheep, but effective is th...
RCI 2970 only putting out 20w – Circuit Schematic
RCI 2970 only putting out 20w
10m has been going so well I bought another 10m radio (RCI 2970not the dx model)from an online auction. It works fine and looks like it`s never been used. BUT i...
GS35B HF amp tank considerations – Circuit Schematic
GS35B HF amp tank considerations
Hi fellow hams I`m now in the design phase of a HF+6m amplifier, using a single GS-35B tube. I have been collecting parts for some time now and I have been quit...
Heath SB-200 keying circuit – Circuit Schematic
Heath SB-200 keying circuit
For those who may want to try a cheaper alternative to the commercially available keying circuits. Works well in my SB-200. Here is a schematic of my modified S...