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ARRL Contest results database - The results from ARRL contests are available here.

Find a QSL Route - Find QSL managers using various QSL databases

QSL statistics - Online database of QSL card exchange status. Lookup if stations confirm QSOs and share your stats by uploading your ADIF log.

Dalry Amateur Radio Group - Small group of amateurs with varied interests ranging from packet radio and data modes to electronics and tutoring.

Online Locator Database - Lookup callsigns in locator, or locator of a specified callsign and display in google map

DX-Sherlock - QSO real time maps and listings - Shows QSO and SWL in real time, taking data from many different sources (DX-Cluster, WSPR, Reverse Beacon). It also allows to send DX-Spots and more features.

OLIVIADATA Group - OliviaData the OLIVIA Yahoo group ham radio

digitalvoice Group - Digital voice on Amateur Radio - devoted to the discussion of digitized voice and data over analog emission modes.

RTTY Basics - Introduction to RTTY by G3LDI

KB2LJJ TS-870S Mods - Radio modifications for the Kenwood TS-870S

TS-940 Mods - KB2LJJ TS-940 modifications page

Scan UK Frequncies Group - A UK Scanning Forum containing UK Frequencies from HF, VHF and UHF in databases and lists. Airband, Shopwatch, Military, Shops, Taxi's etc.

Mauritz Communication - Electronics, Radio Technology, Data Processing Technology, Cable Assembly dealer

Depiction - Depiction mapping software can download and integrate maps, elevation plots, weather data, situation reports, damage assessments, volunteer movement, and more. It interface with your APRS ssystem

Repeater Range Android App - M3OYQ’s Repeater Range is a free application designed to run on the Android mobile phone platform. The the app listens to the onboard GPS and displays the bundled repeater database as a simple list sorted by the range.

Amateur Radio Call Log - Amateur Radio Call Log is a basic ham radio logging app for Android 1.5 and above. It stores Date, Time, Station, Freq, Mode, RST, and additional comments. Also has the ability to easily look-up callsign information from the FCC database.

Amateur Radio Callsign DB - Ham Radio Android app, quickly and easily lookup license data for U.S. amateur radio callsigns

PDA QRZ - Free windows program to access your QRZ subscription database.

FCC Call - FCC_Call is a program that allows you to create a database from the FCC license records and to look-up the FCC records by call, name or city. It requires TRX-Manager or VB5 runtime installed.

LM - Log Post Processor - LM is a program to edit contest logs ex post; a so-called contest post processor. With help of LM the user shall be able to convert his raw data to an up-to-date electronic log in a comfortable way and with as less effort as possible. Usefull to convert Cabrillo and ADIF formats

Excel ADIF Converter - Use this excel spreadsheet and use it to input your old manual logbook data and have it converted to the ADIF format

VHF Linear Amplifier by SV1BSX - There is not a personal design on this page, just I've transfered useful notes from PHILIPS RF Bipolar Transistors - Data HandBook about BLY89C VHF Power transistor, which is very popular among Amateur Radio homebrewers

Fast, smart NiCD/NiMh battery charger - PCB for a battery charger described in the datasheet for the MAX712/MAX713 fast charge controllers.

Coax cable types - G4URH - Coax cable types, specifications and data

National Semiconductor - National Semiconductor Corporation, component database