Technical Information

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Technical Information

Antennas:

Construction Projects

7N3WVM's Home Page for Homebrewers
73 kHz phasing transceiver
Amateur Radio Homebrew Projects on the Net
Amateur Radio QRP Projects
Amateur Radio Receivers by David White
Amateur Repeater Builders Home Page
Amplifiers
Broadcast-Quality FM Transmitter Designs
Build Your Own CI-V Interface for Icom Radios
Construction Projects - by John Seboldt, K0JD
COR Hangtimer - simple controller to key a transmitter
Doppler Direction Finder - David Robbins, K1TTT
Electronic Cookbook Archive
Electrical Engineering Circuits Archive
Forrest Cooks Electronic Circuits
Getting the most from your repeater system
Glowbug Bibliography - Tube Projects
Glowbug Transmitter - by KC5VQL
Homebrew Corner from G3YCC
ITU REC-V.36 Descrambler - For EMWIN
JF1OZL QRP,Hand Made Amateur Radio
K9KLT Power Line QRN Killer
KD9JQ Homebrewing Info - Nice site
KnightSMiTe - Surface Mount tranceiver kit
Lessons on Radio Design by AB4BE
Mrx-40 - Mini 40 Meter Receiver Kit
Miniature Weather Satellite Data Receiver
NA4G's homebrew firebottle gear....
Norcal 38 Special - 30 Meter Superhet Transceiver
Norcal 49er - 40 Meter QRP Rig
Norcal 49er Info from Knightlites
Optimist 80 - a QRPp DSB rig for 80 meters by SM6LKM.
Rainbow Tuner - QRP Antenna Tuner/SWR Bridge
The Tuna Tin 2 Revisited - QRP 40M Transmitter
PIXIE 2 TRANSCEIVER
Pixie2 Tips from WE6W
Projects Circuits from the Minnesota QRP Society
R2/T2 Construction Projects By K0JD
Repeater Builders Technical Information Page
ScQRPion Visual SWR Indicator
A Simple SWR Meter For QRP Levels - by WB0POQ
SMIRK Technical List - Lots of 6 Meter Stuff
SM0VPO'S Collection Of Projects
Tech Topics from the Northwest ARS
Valentin Gvozdev's Home Brew Page
VK6FKB's DSB Project
W8EDU Ham Radio Projects page
WB4QXE - Ham Homebrew page
QRP Projects collection of WE6W

Modifications/Conversion/Troubleshooting:

Technical Reference:

AC6V's TEC REF - Lots of good stuff
Chip Directory
Coax Cable Database from Times Microwave
COAXIAL CABLE SPECIFICATIONS
Coaxial Cable Types
Component Database Server at Penn State
Conversion of Power (dBm to MilliWatts)
Dallas Semiconductor
Duplexer Tuning -
Eimac (Tube Manufacturer)
Electronics Info Page - of Tomi Engdahl Lots of Info
FT243 Crystal Grinding Information Compilation
Good source for amplifier tips
Microstrip Calculator in Java
Motorola RF Transistor info
Molex Incorporated - Connectors
NiCad FAQ file
NTE Electronics - Free Cross Ref
Svetlana Products
Times Microwave Systems
Toroid Design - by Jack Ponton, GM0RWU
Transistor Cross Reference Database - over 40,000 transistors
Unusual Diode FAQ The

Tube Information

Blue Glow In Tubes FAQ
Tubes Audio - Includes Spice Models
Tube Data - Audio
Tube Data Guide - From Trevor Gale
Tube data sheets
Tube data compiled by SM5GNN
Tube Directory, The - Italy, many foreign tubes
Tube Gallery - Japan
Tube Interchangeability guide - Hong Kong
Tube Lore - From the Tube Dude!
Tube Substitution and Characteristics Guide
Tube Special Purpose to JAN Cross Ref
Tubes that glow - Mister Valve
Tube VT to HAN/RMA/EIA Types Cross Ref
Vacuum Tube Page

RFI / Interference

INTERFERENCE HANDBOOK - From the FCC
Reducing RFI with Ferrite

Misc

Tunekit® - Filter Tuning Kit for Windows
CircuitMaker - Professional, Easy-To-Use Schematic Design