Friday, July 4, 2014

A Transmitter Circuits

1 Valve 3.5MH CW Transmitters

1 Valve CW Transmitter

1.5 Volt Tracking Transmitter

1.5 Volt Tracking Transmitter 2

10W HF Linear Amplifier

150mW FM Transmitter

1W CW Transmitter

2 Transistor FM Transmitters

2 Transistor FM Transmitters:

2 Valve 40m CW Transmitter

2 Valve CW Transmitter

20M, 4W QRP Transmitter

250mW HF CW Transmitter

27MHz AM/CW Transmitter

2N2222 40 Meter CW / DSB Tranceiver

3 Watt FM Transmitter

30 Meter QRP Transmitter for Morse Code

3W HF QRP Linear Amplifier

4 Transistor Tracking Transmitter

4 Transistor Transmitter

433MHz Transmitter using SAW Resonator

5 Watt HF CW Transmitter

500mW HF Linear Amplifier

56K RF Modem

5W PLL Transmitter

7Mhz AM/CW Amateur Radio Transmitter

7MHz QRP Transmitter

7MHz SSB Transceiver:  Circuit digram and brief description of 7MHz SSB Transceiver for Hams. The circuit is designed around two numbers of MC1496. It can push around 80 Watts with IRF840 in the final. You can down load HTML version or the printer friendly word document.

80 Meter DSB Transmitter

807 and 1625 Valves:  data on vacuum tubes 807 and 1625 used in ham radio transmitters. Describes various pin voltages and different operation modes.

AM DSB Transmitter for Hams:  circuit diagram of simple double side band suppressed carrier (DSBSC) transmitter for hams. Circuit uses crystal oscillator, crystal can be switched for multi band operation. .

AM oscillator for Wireless Microphones

AM Transmitter

Antennas for Ham Transmitters:  Describes how to construct various type of antenna for Ham Radio Transmitters.

AT Volt Repeater Controllers

Basic FM Radio Transmitters

Basic RF Oscillator #1

Basic RF Transmitter for PIR Sensors

Battery operated FM rebroadcast transmitter :  Gives you 10 to 20 meters range and runs for months on a single penlight cell.

Ceramic Filter BFO:  Receive SSB and CW transmissions on your BC receiver. Simple BFO is build around 455 KHz Ceramic Filter.

Crystal Controlled FM Transmitter

Current Transmitter With Linear Voltage Transfer Rejects Ground Noise:  08/07/00 Electronic Design - Ideas for Design / Many systems use current signals to control remote instruments. The advantage of this method is the ability to operate with two remotely connected power supplies even if their grounds are not the same. In these cases, it's necessary for the output. . .

Design of Brookdale AT Volt Repeater System Exciter:  uses a pair of Hamtronics model TA4512-watt narrow-band FM voice transmitters to develop video and audio carriers on439.250 MHz and443.750 MHz

Easy 2 Meter Transmitter:  This project is a simple transmitter using only one crystal and will cover 145.00 to 146.00 MHz. The crystal is a 44.9333 MHz crystal for 145.500 receive, as used in the Trio (Kenwood) 2200, PYE, Motorolla, Tait equipment, to name but four. The frequency of the crystal is not critical as almost any other xtal for the 2-meter band will function

Experimental Data Transmitter for Fiber optics

Fibroptic transmitter

FM Band Monaural Transmitter

FM Beacon Transmitter (88 108 MHz):  This circuit will transmit a continuous audio tone on the FM broadcast band (88-108 MHz) which could used for remote control or security purposes. Circuit draws about30 mA from a 6-9 volt battery and can be received to about100 yards.

FM Broadcast Audio Transmitter :  Monophonic FM band transmitter for home use.

FM Bug

FM Radio Bug

FM Radio Telephone Transmitter

FM Radio Transmitter

FM Radio Transmitter #1

FM Radio Transmitters With OpAmp

FM Transmitter

FM transmitter

Four Channel Wireless Transmitter & Receiver:

Four Transistor Tracking Transmitter

Frequency Agile 80m CW QRP Transmitter

High Power FM Bug

Infra / Radio Remote Control Transmitter / Receiver

Infrared Transmitter and Receiver Schematic Diagrams

Infrared Transmitter Circuit:

Infrared Transmitter for Audio:  (Amplitude Modulated IR)

Laser Diode Transmitter

Laser Transmitter Schematics

Light Sensing RF Transmitter

Li'l 7 AM Transmitter Schematic

Long Range FM Transmitter

Low Power FM Transmitter

Micro Power AM Broadcast Transmitters:  In this circuit, a 74HC14 hex Schmitt trigger inverter is used as a square wave oscillator to drive a small signal transistor in a Class C amplifier configuration. The oscillator frequency can be either fixed by a crystal or made adjustable VFO with a capacitor/resistor combination.

Micro Spy With FETs

Micro Spy With TTL

Micro Spy With USW

MicroPower FM Broadcasting Circuits

Miniature FM Transmitter #2

Miniature FM Transmitter #3

Miniature FM Transmitter #4

Miniature FM Transmitters #4

Miniature MW Transmitter:  circuit diagram of simple medium wave transmitter using BF494B. This simple transmitter have a range of 200 meters. .

MINIATURE TRANSMITTER:   What can I say about this circuit except brilliant I have actually built this one and was very impressed, I built it using leaded components maybe one day try a bit of smd make it even smaller, problems needs a big Ariel to transmit over any great distance.

One Valve 3.5MH CW Transmitter

Op Amp Based FM Transmitter

Phasing SSB Exciter

QRP HF Transmitter

QRP Keyer:  very simple keyer circuit using only one transistor.

QRP SSB Transmitter

Quality FM Transmitter

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Sensitive FM Transmitter

Shortwave Radio Transmitter

Shortwave Transmitter:

Simple FM Microphone

Simple FM Transmitter #1

Simple Low FER Transmitter

Simple RF Transmitter

Simple T Volt Transmitter #1

Simple T Volt Transmitter #2

Simplest RF Transmitter

Small circuit forms programmable 4 to 20 mtransmitter:  04/17/03  EDN-Design Ideas / One of the key challenges in the design of 4 to 20-mA current transmitters is the voltage-to-current conversion stage. Conventional transmitters use multiple op amps and transistors to perform the conversion function. These approaches have been around for a long time, but they are usually inflexible, have poor power efficiency, and have limited current compliance...

Small FM Transmitter #2

Small Radio Transmitter

Spark gap Transmitter

Surveillance Transmitter Detector:  This circuit can be used to "sweep" an area or room and will indicate if a surveillance device is operative. The problem in making a suitable a detector is to get its sensitivity just right, Too much sensitivity and it will respond to radio broadcasts, too little, and nothing will be heard.

T Volt Transmitter:  allows you to send video to any television in the house, Poptronix kit circuit

Telephone Transmitter

Three Watt FM Transmitters

Tracking Transmitter #1

Tracking Transmitter #2

Transmitter senses triple relative humidity figures:  09/26/2002  EDN - Design Ideas / The circuit in Figure 1 is a triple, relative-humidity sensor and radio transmitter. Sensors 1 and 2 form two gated oscillators with natural frequencies of 10 and 5 kHz, respectively, at relative humidity of 50%. The gated oscillators use variable resistances R2 and R3, respectively. Together, these two oscillators generate FSK-modulated outputs at output of IC1B, Pin 6..

Transmitter using LM317:

Two Transistor FM Transmitters

Two Valve 40m CW Transmitter

VHF / UHF T Volt Modulator:   Elektor January1985

VHF Audio Video Transmitter:  This circuit is a TV transmitter on VHF band.

VHF beacon transmitter

VHF FM Transmitter

VHF Transmitter

Video / Audio Wireless Transmitter:  circuit diagram and project description

Video to RF Modulator:  This circuit is a RF modulator which can be used for modeling of video signal.

Video/Audio Wireless Transmitter

Wire Tracer

Wireless IR headphone Transmitter

Wireless Microphone #1

Wireless Microphone #2

Wireless Microphone #3

Wireless Microphone Transmitter

WLW 500KW Transmitter Schematic

XTAL Locked tone Transmitter

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