- DF9CY Technical Articles and Material
A collection of technical articles on antennas, radios and other stuff.
By Christoph
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Votes: 1 | Rating: 8
- Ham Radio Projects by Wireless Society of Southern Maine
Wireless Society of Southern Maine Projects instructions and photos for many ham radio projects and ...
By Tim Watson
- Homebrew projects by dl5dbm
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KW,2-meter,6-meter,antennas,amplifiers,preamps,powersupplys, and more
By Anwar von Sroka
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Votes: 154 | Rating: 6.77
- QRO GU-84B TETRODE
GU-84B Homebrew HF Amplifiers
By Chris Fox NI4L
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Votes: 21 | Rating: 4.43
- 27Cxx Eprom programmer and KissEprom
Simple eprom programmer for 27Cxx family used in TNC and G3ruh modem eprom tutorial schematics ...
By Talino iz7ath
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Votes: 77 | Rating: 5.26
- 40 meter QRP Transceiver
This semi homebrew QRP low power CW transceiver is based on the ARK 40 transceiver ...
Votes: 7 | Rating: 6.85
- 40 Segment LED S-Meter
Provide your radio with a very string signal then adjust the HIGH LEVEL pot to ...
By n6bg
- 7 MHz SSB Transceiver
Circuit diagram and discription of 7 MHz Ham Radio SSB Transceiver Transceiver using two MC1496 ...
By Yujin
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Votes: 43 | Rating: 6.48
- 75 meter AM Transceiver
Frequency coverage: 3.75 MHz to 4.00 MH transceiver for 75 MHz band
Votes: 1 | Rating: 10
- 80 Watt FM stereo broadcast transmitter
A high quality broadcast transmitter big enough for a medium town
Votes: 1 | Rating: 10
- A *balanced* balanced antenna tuner
The published version of this article appeared in the February 1990 issue of QST Magazine ...
Votes: 11 | Rating: 7.28
- A 2.3GHz to 432MHz receiver converter
Receiver converter that can be plugged to the backside of the Yaesu FT 817 battery ...
Votes: 3 | Rating: 4
- A 20 Ampere / 13,8V power supply
A 20 ampere and more 13,8V power supply for RTX
By Talino
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Votes: 43 | Rating: 5.57
- A 6M Transverter
Build a transverter based on a 6M receive converter A 32MHz TTL oscillator is used ...
Votes: 2 | Rating: 10
- A cheap S Meter
A low-level voltage meter and could even be used for audio purposes.
Votes: 4 | Rating: 6.25
- A CW Sidetone Bypass
A CW sidetone bypass for the NESCAF audio filter a small and low cost circuit ...
- A D-ATV transmitter project
Build this simple and cheap 70 MHz Exciter and start to transmit Digital Television by ...
By F4DAY
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Votes: 1 | Rating: 8
- A Modern Thermocouple Ammeter
Thermocouple ammeters are very rare these days but the job they were perfect for measuring ...
Votes: 2 | Rating: 6
- A Pb Battery Recharger
The starting idea was to build a battery charger for Pb battery used in car ...
By Talino
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Votes: 3 | Rating: 3.67
- A Simple Dual Band SSB Transceiver
Homebrew a dual-band transceiver with a crisp receiver and a clean SSB signal
Votes: 2 | Rating: 7
- A Simple Telegraph Key
How To Build Code-Practice Apparatus: A Simple Telegraph Key
Votes: 12 | Rating: 5.75
- A Simple VFO for 80 and 160 Meters
This VFO is simple to build and is quite stable.
Votes: 1 | Rating: 7
- A Three-Band One-Tube Novice Transmitter
A homebrew radio transmitter project based and inspired by the original 30 Watts input on ...
By KC9KEP
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Votes: 2 | Rating: 10
- ACWS: Automatic CW Sender by iz7ath
Simple circuit, with a simple push, transmit a memorized Cw messages
By Talino
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Votes: 1 | Rating: 8
- Analog Inputs on a KPC-9612 TNC
Modify a KPC 9612 to give a total of four analog input for remote monitoring ...
By Ian McLaughlin
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Votes: 3 | Rating: 7
- Antenna elevator system for amateur satellites
Smart homebrew antenna ELEVATOR system with linear actuator The actuator is a cheap and heavy ...
By Jerry
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Votes: 44 | Rating: 7.66
- AR8000 Serial Link
A simple and inexpensive way to connect an AR8000 to a portable computer
Votes: 2 | Rating: 6.5
- Automatic Band Decoder
An automatic band decoder made into a nice enclosure with LED indicators for the chosen ...
By OZ1CX
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Votes: 1 | Rating: 10
- Automatic Band Decoders
Build your own band decoder, for kenwood rigs too
Votes: 1 | Rating: 10
- Automatic Band Decoders
To build a Band Decoder to drive our remote relays we need to supply the ...
Votes: 1 | Rating: 2
- Automatic Roger Beep for VHF/UHF Contests
This project details an automatic roger beep circuit for VHF UHF contests Built around a ...
By M1GEO
- Band decoder
Automatic and decoder project by sm3wmv
Votes: 1 | Rating: 1
- Basic RF Oscillator
A simple RF oscillator by Harry Lythall - SM0VPO
By SM0VPO
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Votes: 2 | Rating: 6.5
- Batlabs
Motorola two way systems technical documents
Votes: 3 | Rating: 6
- Bluetooth Audio and Amateur Radio
Bluetooth headsets are very common with cell phone users As such many amateurs may already ...
Votes: 10 | Rating: 6.6
- Build A 100Khz Crystal Calibrator
Votes: 7 | Rating: 7.15
- Build a Vox Circuit
by Mike Martell N1HFX
Votes: 22 | Rating: 5.19
- Build yourself an RF Ammeter
An Easy way to Monitor RF AC or DC current with one instrument by W5JGV ...
Votes: 6 | Rating: 6.33
- Change Battery on DVS-2
The DVS-2 is a CQ unit for the Yaesu Trancievers.
- CW Filter
I0QM Gaussian CW Filter page This Filter for the weak signals is the evolution of ...
Votes: 2 | Rating: 8
- CW Key-to-Rig Switch Box
This is an easy afternoon project to switch multiple cw keys between several rigs If ...
By AB3AP
- DirectDirt
The Information Source For Makers Experimenters DIY Home Brewers Restorers and Amateur Radio Operators ...
Votes: 4 | Rating: 10
- Display/Stabiliser unit
The Display/Stabiliser unit displays the signal frequency on a Hitachi LCD module.
Votes: 1 | Rating: 10
- DIY Basic Electronics and Antennas
DIY Basic Electronic Theory Basic Antenna Theory with Antennas built from common materials What does ...
By KG4ZNC
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Votes: 15 | Rating: 7.85
- DL6JAN's CW keyboard
A micro processor interface that converts PC keyboard code into Morse code
By Christian
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Votes: 6 | Rating: 9.5
- Dual Output 200 MHz RF Generator/Detector
Dual Output DDS Based RF Generator Detector with links for the associated QEX NimbleSig III ...
By Tom, VA7TA
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Votes: 1 | Rating: 8
- DVX Project
Digital Voice Transceiver Project This Project began to explore the use of the DVSI AMBE ...
Votes: 1 | Rating: 1
- EI7BA's Amateur Radio Pages
Antennas and homebrew ancilliary equipment
By EI7BA
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Votes: 17 | Rating: 9.18
- EI9GQ
Homebrew page with some great homebrew gear shown here.
By EI9GQ
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Votes: 33 | Rating: 7.81
- Eprom Eraser
An Eprom Eraser with UV Ray for 27Cxx Eprom and similar common in TNC with ...
By Talino
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Votes: 4 | Rating: 7.5
- ESR METER: (Equivalent Serie Resistance of capacitors)
Esr meter to measure the equivalent serie resistance of capacitors
By Talino
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Votes: 28 | Rating: 5.63
- Experimental HF 6-band SSB transceiver
An SSB radio for the HF bands will be presented Featuring 12 to 20 Watts ...
By DK7IH
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Votes: 15 | Rating: 9.34
- F5AYE microwaves pages
Pages on microwaves,homebrew, beacon HB9G 5.7 and 10 Ghz.
By PILLER JeanPaul
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Votes: 4 | Rating: 6.25
- F5RDH homebrew projects
some interestig homebrew projects
By Jean-Marc
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Votes: 35 | Rating: 7.94
- Ferrite information
Ferrite Toroidal Cores Magnetic Properties of Ferrite Materials EMI RFI Suppression Design Considerations Ferrite Beads ...
Votes: 4 | Rating: 5
- Frequency Locked Loop VFO for HF
A device which joins in a single microprocessor a digital programmable frequency meter and a ...
Votes: 4 | Rating: 7.75
- G3PTO
Homebuilt Amateur Radio & CW communications web site
By g3pto
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Votes: 12 | Rating: 7.6
- Ham Radio Beat Frequency Oscillator
A simple free running oscillator oscillating at the receiver s IF intermediate frequency beats with ...
- Ham Radio Circuits
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Circuits of SSB Transceiver AM DSB Transmitter Antennas BFO VFO 807 FM Mike Crystal filter ...
By Yujin
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Votes: 57 | Rating: 5.36
- HAM Radio DIY Projects by DL8ABH
Ham Radio DIY projects all around morse semi automatic and fully automatic bug keys construction ...
By Wolfgang Palme DK5EI
- Ham Radio Homebrewing by IK3OIL
A collection of projects for Amateur Radio Homebrewing enthusiasts
By Francesco Morgantini
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Votes: 21 | Rating: 7.28
- High Potential Tester (high-pot.)
Votes: 2 | Rating: 7.5
- Hombrewing an HF Transceiver
This page will describe the construction of a multi band SSB transceiver with all its ...
Votes: 6 | Rating: 8.33
- Home Brew a Condenser Microphone
An inexpensive condenser microphone with excellent performance can be easily constructed with easily available parts ...
Votes: 2 | Rating: 5.5
- Home Made 5KV Capacitor
Building a high voltage (5KV), variable plate capacitor (17 to 220pF)
Votes: 7 | Rating: 7.28
- Homebrew Butterfly Capacitor
Butterfly capacitors are hard to find expensive but they can be home made by PY1AHD ...
Votes: 12 | Rating: 5.58
- Homebrew Dow-Key
Homemade an external T/R switch for your vintage RTX by KB8OJH
- Homebrew resources for wireless enthusiasts
PDF resources containing information on low cost ssb am cw circuits which are useful for ...
By Sandeep
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Votes: 8 | Rating: 7.13
- Homebrew Spectrum Analyzer
Project for DXers and experimenters alike An old article publishes by 73 Amateur Radio magazine ...
By KE0UV
- Homebrew your own inductors
updated
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Cannot find the inductors you need for an antenna a tuner or amplifier Build your ...
By W3JIP
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Votes: 22 | Rating: 7.04
- HSCW transmit interface box
Versatile transmit interface circuit
Votes: 2 | Rating: 8
- Hybrid antenna splitter
This scheme can be used to combine two antennas
- Hybrid Synthesizer for UHF and microwave
A versatile hybrid synthesizer for UHF and Microwave Projects
- I1KFH Homebrewing
Homebrew web site
By Sergio Brovero i1kfh
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Votes: 3 | Rating: 6.67
- IC8POF'S mods
IC8POF s How To index Hamradio mods Crazy PA Tuner project transform any manual amplifier ...
By Phil
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Votes: 4 | Rating: 9.25
- IK3OIL Ham radio homebrewing
A site devoted to Amateur Radio Homebrewing CW decoder CW QRP Transceiver for the 40 ...
By ik3oil
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Votes: 10 | Rating: 4.5
- IK4AUY Sergio
Advanced QRP Low Cost Mosfets HF Linear Amplifier with schematics IMD gain data and more ...
By Sergio
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Votes: 27 | Rating: 8.1
- IK8MKK Home-Made equipment
Two 50 Mhz amplifiers and antenna switch
Votes: 2 | Rating: 9.5
- Impedance Bridge
by Harry Lythall SM0VPO
By SM0VPO
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Votes: 11 | Rating: 7.38
- Improved PL Tone encoder
N1HFX project to improve PL tone encoder providing a more stable frequency
- IZ7ATH Projects
Antennas, Keyer, amplifier, transverter, baluns
By Talino
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Votes: 26 | Rating: 6.32
- K8CU Technical Topics
Well documented Amateur Radio HF VHF antenna projects high power Russian GS35B RF amplifiers mobile ...
By K8CU
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Votes: 11 | Rating: 7.64
- K8TM Articles
This publications page lists articles on surface mount devices amateur radio soldering shunts and measuring ...
By Dean Poeth, Schenectady, NY
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Votes: 1 | Rating: 1
- Kenwood Pin Connectors
Microphone, accessories and data packet pin connection schematics for Kenwood Radios
Votes: 8 | Rating: 7.5
- KI5YN QLF Filter
A microprocessor based interface designed to go between a standard Morse code key and a ...
- LC METER
Inductance and Capacitance meter using``Frequency Shifted Oscillator
By Talino
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Votes: 21 | Rating: 4.86
- LF Converter
Home made LF converter, listen to signals below 300 KHz
- LY3LP laboratory
QRP DIY and more
By Klemensas, LY3LP
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Votes: 9 | Rating: 7.79
- Make you drill more flexible
A useful tool to make PCB
By talino
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Votes: 2 | Rating: 3
- N2CQR 20 meter portable DSB transceiver
Homebrewed transceiver for 20 meter originally born for 17 meters band
- N3LS Larry
Amateur radio links and homebrew projects
By Larry Sonnie Jr
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Votes: 4 | Rating: 1.5
- No tune SSB/CW transceivers
no tune SSB/CW transceiver for 1296, 2304, 5760 and 10368 MHz
By Sergio
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Votes: 3 | Rating: 7
- OH7SV Matti Hohtola Ham Projects
The most modern QRP transceiver in 2004 Direct Conversion HF Transceiver with DDS LO 50 ...
By Matti Hohtola
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Votes: 36 | Rating: 8.11
- PA3FXO projects
Contains digimodes, antenna projects, DX info and lots more
By Cees
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Votes: 4 | Rating: 9.75
- PC to RTX interface
Schematics for IC 706 IC 718 IC 756PRO TS 570 TS 870 and simple universal ...
Votes: 2 | Rating: 7.5
- PCM Kestrel HF Transceiver
This article describes an upgrade to the Kestrel transceiver replacing its LCD display with a ...
By vk3yy
- PG1N's Hambrew Site
Homebrew-page of PG1N with lots of homebrew links
By Maarten Ouwehand
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Votes: 76 | Rating: 8.61
- QRP 20m Antenna Tuner Unit
A QRP antenna tuner for 20 meters band
Votes: 6 | Rating: 5.83
- QRP AM(cw) Transmitter for 10 meters
In this project you will make a simple low power broadcast type circuit using a ...
Votes: 2 | Rating: 10
- Radio-TNC wiring
Radio-TNC wiring diagrams index
Votes: 13 | Rating: 5.22