3W FM Transmitter Amplifier
3W FM Transmitter Amplifier Presented is a three stage 3W FM Transmitter Amplifier using 2SC9018, 2SC2053 and 2SC1970 transistors. The circuit is supplied by 12-14V DC voltage and requires at least...
View Article30 Watt Linear FM Amp with BLY89
30 Watt Linear FM Amp with BLY89 A amplifier of medium force RF for the FM, is always essential for the amateur that wants it strengthens some small transmitter, that likely it has already it...
View Article1Watt AM CW Transmitter for 10 Meterband
1Watt AM CW Transmitter for 10 Meterband In this project, you will make a simple 3-stage low-power broadcast-type circuit, using a crystal oscillator integrated circuit and an a collector modulated AM...
View Article4 Transistor FM Transmitter
4 Transistor FM Transmitter This circuit provides an FM modulated signal with an output power of around 500mW. The input microphone pre-amp is built around a couple of 2N3904 transistors (Q1/Q2), and...
View Article300 MHz Prescaler
300 MHz Prescaler A preamp that drives the CMOS counter input and a divide by 10 prescaler to extend the range of A Little More Serious Frequency Meter. The MCT10280 prescaler can be set to divide by...
View Article40 Watt FM Transmitter Amplifier
40 Watt FM Transmitter Amplifier Building two stage 40 Watt FM Transmitter Amplifier. RF input power should be between 0.5 and 1 watt. Amplifier is powered by 28V power supply. The diagram shows a...
View Article2 Watt FM Transmitter
2 Watt FM Transmitter This 2 Watt FM transmitter will provide 10km range in good weather conditions. Use dipole antenna for maximum range. Transmitter can be tuned between 88-108 MHz with c5. BB204...
View Article400mW VCO FM transmitter
400mW VCO FM transmitter With good antenna (dipole placed outdoor and high) the transmitter has very good coverage range about 500 meters, the maximal coverage range is up to 4 km.
View Article300mW FM Transmitter
300mW FM Transmitter Here's a long range 300mW FM Transmitter for the 88MHz to 108MHz band. This particular TX is of special interest to those wishing to build low power Power Amplifiers for the VHF...
View Article40mW FM TRANSMITTER
40mW FM TRANSMITTER The transmitters on my homepage seem to be quite popular, especially those intended for the 88 - 108MHz FM band. I must really confess that I also favor this broadcast band, mainly...
View Article200mW FM Broadcast Transmitter
200mW FM Broadcast Transmitter A simple 200mW FM Transmitter circuit which covers frequencies from 88 to 108 MHz. It is built with 3 transistors: BC109, BFR91A and BFR96S. It is quite stable and the...
View Article30W Digital RF Wattmeter
30W Digital RF Wattmeter This project will explain how I build my new wattmeter.This watt meter will be able to measure power from 300nW to 30W @ (0-500MHz).This wattmeter is based up on a dummy load...
View Article5 Watt FM Amplifier
5 Watt FM Amplifier This design is a 2 stage amplifier that has about 17db of gain, suitable for an input of 50 to 100 MW. Its basically a Veronica 5 watt vco transmitter, without the vco. The...
View Article20W FM Amplifier
20W FM Amplifier This Power amplifier is equiped with two Philips bipolar transistors : the BLV10 Output) have been determined by using the software: Mimp.EXE. A 9 elements low pass filter ensures that...
View Article2km Long Range FM Transmitter
2km Long Range FM Transmitter The power output of many transmitter circuits are very low because no power amplifier stages are incorporated. The transmitter circuit described here has an extra RF power...
View Article30W VHF FM Amplifier for 88 - 108 MHz with BLF245 MOSFET
30W VHF FM Amplifier for 88 - 108 MHz with BLF245 MOSFET The achievement of this 30-watt amplifier has been designed to take place on a heatsink microprocessor PC equipped with its fans, the advantage...
View Article250mW FM Transmitter Amplifier
250mW FM Transmitter Amplifier This project is a simple 2-transistor VHF power amplifier, with about 16dB gain, and requires no tuning or alignment procedures. Wideband techniques have been used in the...
View Article25W RF amplifier
25W RF amplifier RF amplifier with 25W of power for 88-108MHz FM transmitters.
View Article2km TV Transmitter
2km TV Transmitter Here is a simple TV transmitter. The circuit is simple and really quite crude, but it does include MONO sound. I have not shown the two regulators in the drawing. These are one 12v...
View Article1W portable PLL transmitter
1W portable PLL transmitter This small FM transmitter includes a limiter, a microphone amplifier and a PLL digital tuning. All the parts are placed on one circuit board. The RF power is switchable...
View Article28W FM Broadcast Transmitter Amplifier 88-108 MHz
28W FM Broadcast Transmitter Amplifier 88-108 MHz This RF Amplifier designed for FM broadcast using a single 2SC1946 VHF Power Transistor. This 10-30W RF amplifier circuit provides an appropriate power...
View Article150W FM Transmitter Amplifier
150W FM Transmitter Amplifier This is 150W FM transmitter amplifier for 88-108MHz band. The amplifier has two stages using BLF244 mosfet transistor for the first stage which requires 0.5 - 1Watt of RF...
View Article1W RF Power Amplifier for iPOD Stereo FM transmitters
1W RF Power Amplifier for iPOD Stereo FM transmitters This project explain how you can build and connect a powerful 1W amplifier to your FM transmitters.A perfect solution for those wishing to listen...
View Article15dB UHF TV Antenna Booster
15dB UHF TV Antenna Booster This is an UHF band TV antenna preamplifier circuit With 15dB gain to build easily. It is formed based on BF180 UHF Transistor. The first stage is an band pass filter...
View Article100W Transmitter Amplifier for 2200m
100W Transmitter Amplifier for 2200m This particular transmitter was later shipped up to VY1JA in the Yukon where, thanks to Jay's excellent antenna system, it was heard in Europe as well as in New...
View Article1GHZ Frequency Meter
1GHZ Frequency Meter This is 1GHz frequency counter with 100KHz resolution. Meter is built in around PIC16F84A microcontroller and SAB6456 / U813BS prescaller.
View Article1KM Power FM Transmitter
1KM Power FM Transmitter This small power FM transmitter can transmit more than 1 km in good conditions. The modulation can be made so much with a microphone or audio source. Circuit of power fm...
View Article1.3W VHF RF Amplifier 2SC1970 88-108 MHz
1.3W VHF RF Amplifier 2SC1970 88-108 MHz This RF power amplifier is based on the transistor 2SC1970 and 2N4427. The output power is about 1.3W and the input driving power is 30-50mW. It will still get...
View Article100W Transmitter RF Power Amplifier 2SC2782
100W Transmitter RF Power Amplifier 2SC2782 This is a 6m band transmitter RF power amplifier (50 MHz) with 100W output. It used with my FT-736R and drive from 10W for the 6m SSB DX. The Building...
View Article1W FM Transmitter
1W FM Transmitter A very good 1 watt fm transmitter circuit, very easy to build circuit. It has 4 transistors, one is a very stable oscillator, followed by a buffer stage to prevent frequency variation...
View Article1.5V Battery Operated Rebroadcast FM Transmitter
1.5V Battery Operated Rebroadcast FM Transmitter This implementation is adapted to rebroadcast the output of a CD player, television receiver, or radio receiver. I use it so that I can move about the...
View Article1W Linear FM Booster
1W Linear FM Booster This RF Amplifier is used for boosting small fm transmiters and bugs. It use two Philips 2N4427 and its power is about 1Watt. At the output you can drive any linear with BGY133 or...
View ArticleSingle Chip FM Transmitter
Parts: IC1: MAX2606 L1: 390nH Specifications: Voltage Supply: 3 - 5V Frequency: 88 - 108MHz Description A simple FM transmitter links your home-entertainment system to a portable radio that can be...
View Article1.5V FM Broadcast Transmitter
1.5V FM Broadcast Transmitter The objective of this 1.5V FM Broadcast Transmitter design is to provide a simple low-power transmitter solution for broadcasting audio from various audio sources. This...
View Article1W Long Range FM Transmitter
1W Long Range FM Transmitter Long range, very stable, harmonic free, FM transmitter circuit which can be used for FM frequencies between 88 and 108 MHz. With good antenna transmitter can cover 5km...
View ArticleTX-200 - 200mW FM Transmitter
Parts List: R1 - 47K R2 - 22K R3 - 39K R4 - 100 R5 - 27K C1, C2, C4, C5, C9 - 1n C3 - 4.7uF C6 - 15pF C7 - 6.8pF C8 - 75pF C10 - 100nF C11 - 2pF C12 - 10pF C13 - 100uF Q1, Q2 - BF199 L1 - 3.5 turns /...
View Article1.5V Tracking Transmitter
1.5V Tracking Transmitter With this circuit you can build a very small tracking transmitter that can be tracked using a FM broadcast band radio receiver. The transmitter can be powered from any 1.5V...
View Article1 Watt PLL FM Broadcast Transmitter
1 Watt PLL FM Broadcast Transmitter This is a 1 Watt PLL FM broadcast transmitter. The RF output varies from 500mW to about 1.2W depending on the frequency selected and RF output transistor used....
View ArticleTX-300 300mW FM Transmitter
This power meter will let you test both the output power of Q2 (VHF amp) and Q1 (oscillator). Circuit is now on the separate board so you can fit the main circuit of the smaller PC board. About TX300 -...
View Article1.5W VHF Amplifier
1.5W VHF Amplifier This project will explain the basic function of a class-C transmitter.I will explain how to dimension a transmitter and the purpose of the different components.I will also explain...
View Article1 Watt QRP Power Transmitter
1 Watt QRP Power Transmitter The 1 watt 20 meter QRP transmitter with VXO. This is a nice QRP transmitter that can be used in combination of one of the simple receivers.Normally these designs have only...
View Article100W FM AMPLIFIER
100W FM AMPLIFIER This Power amplifier is equipped with a bipolar transistor,the famous MRF317As lots of FM amplifier application ,the power transistor is in a C class bias.All the impedance networks...
View Article1 Watt Universal RF Amplifier
Parts: Q1 Transistor: 2N5109, MRF227, 2N4427, 2N3866 Specifications: Voltage Supply: 12 - 15V Description This is a universal 1 Watt RF class C amplifier that is ideally suited for low power FM...
View ArticleBA1404 - HI-FI Stereo FM Transmitter 88 - 108 MHz
BA1404 Stereo FM Transmitter Components: BA1404 IC 38KHz Crystal L1 - 3.5 Turns Variable Coil 1x PCB 1x 38KHz Crystal Oscillator 1x DIP-18 IC Socket 1x 3.5T Variable Precision RF Coil 1x 10uH Inductor...
View Article0-500MHz PIC16F876 RF Power Meter
0-500MHz PIC16F876 RF Power Meter RF Measurement has been an expensive work so far the cost of measuring instruments are concerned. RF Meter is based on PIC16F876 microcontroller, AD8307 and 2x20 LCD...
View ArticleBH1417 Stereo PLL FM Transmitter
Parts: 1x BH1417 - Stereo PLL Transmitter IC (Case SOP22) 1x 7.6MHz Crystal 1x MPSA13 - NPN Darlington Transistor 1x 2.5 Turns Variable Coil 1x MV2109 - Varicap Diode 1x 4-DIP Switch ANT - 30 cm of...
View Article0.1 - 3.5GHz Prescaler
0.1 - 3.5GHz Prescaler This handy prescaler divides input frequency by 1000. It takes maximum input frequency of 3.5GHz and converts it into 3.5MHz that may be measured using standard frequency meter.
View ArticlePhone FM Transmitter
Phone FM Transmitter This Phone FM transmitter connects in series to your telephone line and transmits the telephone conversation over the FM band when you pick up the telephone handset. Transmitted...
View Article1 Watt Four Stage FM Transmitter
1 Watt Four Stage FM Transmitter This FM transmitter circuit uses four radio frequency stages: a VHF oscillator built around transistor BF494 (T1), a preamplifier built around transistor BF200 (T2), a...
View Article2KM Long Range FM Radio Transmitter
This long-range FM radio transmitter has an additional RF power amplifier stage, after the oscillator stage. The extra RF power amplifier used to strenght up the power output to become 200-250...
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