simple frequency counter

Amateur Vertical Antenna Calculator  ^{updated  pop} - This calculator is designed to give the vertical length (height) of a particular antenna, for the frequency and wavelength chosen.

LF Receiving Loop - A really simple LF receiving loop antenna

19 AT 318 Home page - Radiocodes, Prefix's, IOTA, Frequency's, Hot links and a lot more.

Super-Duper Contest Logger - SD sets the standard for fast, simple logging and editing in the major international contests and in dozens of others worldwide. Runs on any PC.

NCDXF/IARU International Beacon Network - The NCDXF, in cooperation with the IARU, constructed and operates a worldwide network of high-frequency radio beacons.

Beacon Transmission Schedule - This table gives the minute and second within each hour of the start of the first transmission of each of beacon on each frequency

US Amateur Radio Frequency Allocations - US Amateur Radio Band Plans by ARRL

Angle linear  ^pop - Linear Radio Frequency (RF) products and peripherals for communications

Trivalantene - Professional antennas in MF, VHF, UHF and SHF frequency range for military applications, civil-professional market, mobile communications, radioamateurs and antennas for special applications - EMC, radiomonitoring, etc.

Sirio Antenne - Antenna for GSM, CB, marine, VHF/UHF, HAM and high frequency 1,9/2,4GHz

Optoelectronics - DTMF, RF, decoders receivers and accessories icluding computer interface boards, frequency counters, tone decoders, spectrum sweeper and nearfield receivers

International Components - International Components Corporation has an extensive range of electronic components consisting of audible signal devices, speakers, microphones, capacitors, electron tubes, connectors, and accessories designed in recognition of the diversity of applications and special characteristics encountered by designers in today's complex world.

Introduction to HF propagation - An Introduction to High Frequency Radio Propagation by IPS Radio & Space Service

High Frequency Propagation Models - Institute for Telecommunication Sciences High Frequency Propagation Models

British DX club - Information about the BDXC and how to join, including a club-compiled list giving time and frequency details for all English language dx and media programmes

RTTY Press Freq list - RTTY press services in english sorted by frequency

Frequency Manager for Windows - A Windows program for Storing, Sorting, Searching, & Printing Frequency Lists.

Dmorse & WDmorse  ^pop - DMORSE freeware teaches Morse Code in simple steps. It is useful both for those starting to learn morse and for those who wish to increase their speed. Dos and Windows versions available.

RadioRaft  ^pop - RadioRaft decodes 10 different ARQ modes, 8 different FEC modes, Packet, Baudot, CW... It works with a Hamcomm interface or a radiomodem. RadioRaft offers automatic detection of modes, speeds and shift. It comes with a frequencymeter/baudmeter included, it has signal frequency tracking and a bit by bit display mode. Very easy to use. practical and fast.

Radio Propagation & Diffraction Calculator  ^pop - This is a radio frequency propagation calculator for the transmission path between an RF transmitter and a receiver.

RadioControl  ^pop - 32-bit Windows software to control multiple radios simultaneously. Beside direct control, it also features frequency and memory management and various scan options. Supported radios range from AOR to Icom and WiNRADiO.

40MHz Frequency Counter Module - Design for a very low cost 6-digit frequency counter module using of the shelf components

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

Microwave marker - A simple marker generator for the microwave bands

Bearcat 210 Scanner Conversion for Weather Satellite - Modification to the Bearcat 210 scanner for reception of 137 Mhz FM is a fairly simple process.