Ham Radio Homebrew

A collection of technical articles on antennas, radios and other stuff.

Wireless Society of Southern Maine Projects instructions and photos for many ham radio projects and ...

KW,2-meter,6-meter,antennas,amplifiers,preamps,powersupplys, and more

GU-84B Homebrew HF Amplifiers

Simple eprom programmer for 27Cxx family used in TNC and G3ruh modem eprom tutorial schematics ...

This semi homebrew QRP low power CW transceiver is based on the ARK 40 transceiver ...

Provide your radio with a very string signal then adjust the HIGH LEVEL pot to ...

Circuit diagram and discription of 7 MHz Ham Radio SSB Transceiver Transceiver using two MC1496 ...

Frequency coverage: 3.75 MHz to 4.00 MH transceiver for 75 MHz band

A high quality broadcast transmitter big enough for a medium town

The published version of this article appeared in the February 1990 issue of QST Magazine ...

Receiver converter that can be plugged to the backside of the Yaesu FT 817 battery ...

A 20 ampere and more 13,8V power supply for RTX

Build a transverter based on a 6M receive converter A 32MHz TTL oscillator is used ...

A low-level voltage meter and could even be used for audio purposes.

A CW sidetone bypass for the NESCAF audio filter a small and low cost circuit ...

Build this simple and cheap 70 MHz Exciter and start to transmit Digital Television by ...

Thermocouple ammeters are very rare these days but the job they were perfect for measuring ...

The starting idea was to build a battery charger for Pb battery used in car ...

Homebrew a dual-band transceiver with a crisp receiver and a clean SSB signal

How To Build Code-Practice Apparatus: A Simple Telegraph Key

This VFO is simple to build and is quite stable.

A homebrew radio transmitter project based and inspired by the original 30 Watts input on ...

Simple circuit, with a simple push, transmit a memorized Cw messages

Modify a KPC 9612 to give a total of four analog input for remote monitoring ...

Smart homebrew antenna ELEVATOR system with linear actuator The actuator is a cheap and heavy ...

A simple and inexpensive way to connect an AR8000 to a portable computer

An automatic band decoder made into a nice enclosure with LED indicators for the chosen ...

Build your own band decoder, for kenwood rigs too

To build a Band Decoder to drive our remote relays we need to supply the ...

This project details an automatic roger beep circuit for VHF UHF contests Built around a ...

Automatic and decoder project by sm3wmv

A simple RF oscillator by Harry Lythall - SM0VPO

Motorola two way systems technical documents

Bluetooth headsets are very common with cell phone users As such many amateurs may already ...

by Mike Martell N1HFX

An Easy way to Monitor RF AC or DC current with one instrument by W5JGV ...

The DVS-2 is a CQ unit for the Yaesu Trancievers.

I0QM Gaussian CW Filter page This Filter for the weak signals is the evolution of ...

This is an easy afternoon project to switch multiple cw keys between several rigs If ...

The Information Source For Makers Experimenters DIY Home Brewers Restorers and Amateur Radio Operators ...

The Display/Stabiliser unit displays the signal frequency on a Hitachi LCD module.

DIY Basic Electronic Theory Basic Antenna Theory with Antennas built from common materials What does ...

A micro processor interface that converts PC keyboard code into Morse code

Dual Output DDS Based RF Generator Detector with links for the associated QEX NimbleSig III ...

Digital Voice Transceiver Project This Project began to explore the use of the DVSI AMBE ...

Antennas and homebrew ancilliary equipment

Homebrew page with some great homebrew gear shown here.

An Eprom Eraser with UV Ray for 27Cxx Eprom and similar common in TNC with ...

Esr meter to measure the equivalent serie resistance of capacitors

An SSB radio for the HF bands will be presented Featuring 12 to 20 Watts ...

Pages on microwaves,homebrew, beacon HB9G 5.7 and 10 Ghz.

some interestig homebrew projects

Ferrite Toroidal Cores Magnetic Properties of Ferrite Materials EMI RFI Suppression Design Considerations Ferrite Beads ...

A device which joins in a single microprocessor a digital programmable frequency meter and a ...

Homebuilt Amateur Radio & CW communications web site

A simple free running oscillator oscillating at the receiver s IF intermediate frequency beats with ...

Circuits of SSB Transceiver AM DSB Transmitter Antennas BFO VFO 807 FM Mike Crystal filter ...

Ham Radio DIY projects all around morse semi automatic and fully automatic bug keys construction ...

A collection of projects for Amateur Radio Homebrewing enthusiasts

This page will describe the construction of a multi band SSB transceiver with all its ...

An inexpensive condenser microphone with excellent performance can be easily constructed with easily available parts ...

Building a high voltage (5KV), variable plate capacitor (17 to 220pF)

Butterfly capacitors are hard to find expensive but they can be home made by PY1AHD ...

Homemade an external T/R switch for your vintage RTX by KB8OJH

PDF resources containing information on low cost ssb am cw circuits which are useful for ...

Project for DXers and experimenters alike An old article publishes by 73 Amateur Radio magazine ...

Cannot find the inductors you need for an antenna a tuner or amplifier Build your ...

Versatile transmit interface circuit

This scheme can be used to combine two antennas

A versatile hybrid synthesizer for UHF and Microwave Projects

Homebrew web site

IC8POF s How To index Hamradio mods Crazy PA Tuner project transform any manual amplifier ...

A site devoted to Amateur Radio Homebrewing CW decoder CW QRP Transceiver for the 40 ...

Advanced QRP Low Cost Mosfets HF Linear Amplifier with schematics IMD gain data and more ...

Two 50 Mhz amplifiers and antenna switch

by Harry Lythall SM0VPO

N1HFX project to improve PL tone encoder providing a more stable frequency

Antennas, Keyer, amplifier, transverter, baluns

Well documented Amateur Radio HF VHF antenna projects high power Russian GS35B RF amplifiers mobile ...

This publications page lists articles on surface mount devices amateur radio soldering shunts and measuring ...

Microphone, accessories and data packet pin connection schematics for Kenwood Radios

A microprocessor based interface designed to go between a standard Morse code key and a ...

Inductance and Capacitance meter using``Frequency Shifted Oscillator

Home made LF converter, listen to signals below 300 KHz

QRP DIY and more

A useful tool to make PCB

Homebrewed transceiver for 20 meter originally born for 17 meters band

Amateur radio links and homebrew projects

no tune SSB/CW transceiver for 1296, 2304, 5760 and 10368 MHz

The most modern QRP transceiver in 2004 Direct Conversion HF Transceiver with DDS LO 50 ...

Contains digimodes, antenna projects, DX info and lots more

Schematics for IC 706 IC 718 IC 756PRO TS 570 TS 870 and simple universal ...

This article describes an upgrade to the Kestrel transceiver replacing its LCD display with a ...

Homebrew-page of PG1N with lots of homebrew links

A QRP antenna tuner for 20 meters band

In this project you will make a simple low power broadcast type circuit using a ...

Radio-TNC wiring diagrams index