frequency divider

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.

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

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.

Mosley Electronics  ^pop - Wide variety of multi-frequency Yagis, Verticals, and Dipoles as well as other single and multi-frequency configurations to meet specific requirements.

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

PSK31 official page - Description of PSK31, mailing list, frequency for QSO

Satellite Frequency list - Satellite frequency list from 3 to 8475 Mhz

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

Scanner-radios picking the right scanner - There was a time that scanning was easy. There were no trunked radio links and no digital radios. There was no encryption with frequency hopping to drivge us scanner radio-operators nuts. And there were no laws at one time telling us what we can scan and what we can not scan. Fortunately even with the above scanning is still a fun hobby.

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

Media 2000 german club - German scanner club with frequency list

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.

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.

TH-D7 control program - This software allows you to control TH-D7 radio functions in real time, using a windows interface. This software will graph current activity of any 4mhz range, allowing the user to mouse click any active portion - automatically changing the radios frequency.

Spectrogram  ^pop - Shareware dual channel audio spectrum analyzer for Windows 2000/XP which can provide either a scrolling time-frequency display or a spectrum analyzer scope display in real time for any sound source connected to your sound card. Can be used for MTHELL, QRSS and DFCW by R S Horne

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