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SAM3, the best radio automation software out there!

Click any of the quicklinks below to access area of interest:

FM TRANSMITTER SCHEMATICS
AM TRANSMITTER SCHEMATICS
FM TRANSMITTER VCO (Voltage controled oscillator) SCHEMATICS
FM TRANSMITTER AMPLIFIER SCHEMATICS
STEREO ENCODER SCHEMATICS
LIMITER SCHEMATICS
STL SCHEMATICS - studio transmitter links
RDS ENCODER SCHEMATICS
MISC. SCHEMATICS
DATASHEETS
SCHEMATICS AND USABLE DATASHEETS

 

Project one World's simplest FM transmitter schematic, period.
If you cannot assemble this transmitter, then perhaps you should give up on assembling anything at all;-)  Range and stability is not premium, but it works! Its a demonstration of what can be done with little to none resources. Please, don't bother asking how you could increase the power of this small FM transmitter.

Discuss this FM transmitter schematic in our Forum!

 

Project one 1W PLL FM transmitter schematic
Cool little FM transmitter. Suitable for study purposes, you can use the RF part of this transmitter easily for your projects. However, unless you know how to build a serial data link and connect this LPFM transmitter to a PC or a microcontroller, you won't be able to use the PLL. All info about the PLL is available at Plessey's web page.

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Project one 2W FM transmitter schematic
This is a bit more complicated transmitter, but gives a mile of range or so. You have to understand that it radiates god knows where, you will be making a lot of interference! This is probably the simplest 2W FM transmitter out there. Keep those two transistors cool, they can die quickly in this circuit. Don't forget that there is no such thing as a free lunch, stability and spectral purity suck. But range is significant (watch those feds).

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Project one Modified 2m VCO/PLL
This used to be a 144MHz FM transmitter, but it can be modified for FM broadcasting. Here are the VCO, the PLL and the block diagram. Don't ask if you don't know what to do with those, this is for someone who knows a bit about basics.

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Project one FET FM transmitter schematic 
This FM transmitter makes for a nice project. No PLL, but stability is excellent. Does have spectral purity problems, though'. An additional filter is recommended. Giving some 400-1000mW.

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Project one Small FM bug
Small and simple FM transmitter. Low cost low quality bug. 

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Turn your PC into a radio station....easiest way to make a radio station

Project one FM PLL transmitter schematic from BiasComms 

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Project one Another simple small FM transmitter schematic

Discuss this FM transmitter schematic in our Forum!

Project one FM receiver with TDA7000

Discuss this FM receiver schematic in our Forum!

Project one Turn your PC (monitor) into an AM radio transmitter,
Only works in Linux, but you can actually play an MP3 on your PC and hear it on radio without any extra hardware!!

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Project oneProject one NEW: World's simplest FM transmitter II, upgraded!
many of you out there complained 7413 is not easy to come by. We have revised the world's simplest FM transmitter to use new, easily available parts. This design is also better as far as stability and output power goes. Enjoy this small and easy to assemble FM transmitter! Keep us posted, post your results in the forum!

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Schematics - AM transmitters 

Project one Small AM bug
Small and simple AM transmitter. 

 

This is approximate design of the 19" rack enclosure

New DSP 10W AM transmitter with crisp audio!
The long awaited AM transmitter is finally here. With built-in compression, limiting and low pass filtering. Covers shortwave, mediumwave and long wave.

 

 

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Schematics - FM VCO designs

Project one VCO I
This is a very cool VCO of professional FM transmitter. I am sure the design itself gives some ideas to you as how to design VCOs. 

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Project one VCO II
Another VCO. It is originally made for 2m station, but is perfect for FM radio band as well. The mosfet serves as PLL mixer. If you want to use direct synthesis method, change this mosfet into buffer. Very clean signal, but it is narrowband. It has to be tuned every time you change frequency.

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 Schematics - FM amplifiers

Project one Amplifier I
Hook this one to any above VCO and voila, you have a 4W FM LPFM transmitter. 

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Project one General purpose amplifiers
This is a link to another page that containes detailed instructions for an amplifiers as well as a couple of other interesting designs from Motorola.

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Project one C class amplifier
RF amplifier, usable for FM pirate radio and other applications. It is NOT suitable for AM.

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 Schematics - Stereo encoders

Project one Stereo encoder I
From Internet, it has been circulating around for ages. 

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Project one Stereo encoder II
...another cool stereo encoder schematic. Looks better than the above model. It has a bit of noise, filtering is not sufficient, but otherwise it can be made to work extremely nicely. Substitute XR2208!

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SE4, click for a closeup!

SE4 DSP stereo encoder, setting new standards in value market!

Project one Stereo encoder III
Yet another cool stereo encoder schematic. What can I say, it definitely works as I have tried it out. Has some hard to find parts.

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Project one Stereo encoder IV from BiasComms
Umm, stereo encoders galore...

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Schematics - Limiters

Project one Stereo limiter I from BiasComms
From Inet, its been circuling around for ages. 

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Schematics - Wireless links (STL)

Project one 24 cm PLL FM link transmitter
From Elektor, you might be able to get this think working as a STL. Its a good starting point...

Discuss this PLL FM LINK transmitter schematic in our Forum!

PCIMAX 2005, raising the bar far beyond competition...

 

 

Schematics - RDS encoders

Project one RDS encoder from Internet
From Inet, its been circuling around for ages. I made it a little bit more readable for you guys.

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Project one And the required program
This is the program that's supposed to be used with RDS encoder, but It doesn't work on my PC. Supposedly works on older machines. Can someone provide a fix for this?

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Schematics - Miscelaneous

Project one Pirate radio survival guide
This file is a MUST READ for every pirate radio operator or wannabe. 

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Project one Aircraft receiver
Receiver for aircraft radios. Very simple 

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Project one Surprise

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LPF 7002 - up to 125W handling of power


Project one Audio scrambler
Audio scrambler, Inverts audio spectrum.

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Project one April 1st
April first electronic gadgets. 

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Project one FM receiver preamplifier
Preamplifier for your FM radio.

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Project one CB Rogerbeep
Simply world's best roger BIP for CB stations
and here is how to hook it up. Plays 4 Mono wav files from EPROM. Email me for PCB. 

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Project one Walkie talkie
Second version of walkie talkie.

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Project one Electronic BELL   Probably one of the best electronics bells. Plays 2 mono 8bit wav files, stored in EPROM. Click below to order a PCB!  No support & troubleshooting is provided.

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Project one Muscle trainer,
transforms 9V into 230V small current signal that can be used to stimulate your muscles (be carefull, could be dangerous)

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Project oneProject one Voice scrambler,
makes your voice hard to recognize and sound metallic

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Datasheets - PLL and transistors

Project one MB1504 

Project one Various integrated circuits

Project one Rf transistors table

Project one Various transistors table

 

 

Schematics - Usable Datasheets

Project one Phillips varicap diodes (BB)
This file is a MUST READ for every pirate radio constructor. 

Project one EEPROMs (used in MAX PRO I)

Project one Atmel uCPU (used in MAX PRO I)

Project one European Telemocommunication Standards

Project one Njm2035

Project one 2SC1971

Project one 2SC2237

Cyber max LCD, professional stereo FM transmitter at an affordable price!

Project one 2SC2539

Project one 2SC2627

Project one2SC3001

Project oneProject one 2SC3628

Project oneProject one 2SC1947

Project oneProject one BB909ADI

Discuss these schematics in our Forum!ODE

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