frequency reference

Antennas Tech reference by K1TTT - Yagi Antennas, Antenna Materials and more.

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.

Radio Era Archives - REA offers a wide variety of items for antique radio. We have schematics, old books, reference data, historical information in paper copy form or on CD-ROM.

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

IOTA on 11m - A web site for IOTA reference on 11 meter band.

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

USNO Mater Clock Time - Time reference from USNO, USNO Time in Standard Time Zones,USNO Master Clock Time Animated GIF Clocks, Analog Java Clock, Compute Local Apparent Sidereal Time, Check your local System Clock vs. our Master Clock!

NASA Astrobilogy - Lots of cool documentation from the astrobiology NASA division, with references to meteors observations

WM2U Digital communications - RTTY, Amtor, packtor, SSTV reference by WM2U

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

Scanning Reference - Informations about Scannings, with frequencies, information about scanning, hardware and software reviews

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

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.

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

K1TTT Technical Reference Priority listing - Technical reference about Accessories, Amplifiers, Antennas, Cable and Connectors, Filters, Geography, Grounding, Gunk, Matching Networks, Projects, Propagation Info Radios, RFI/EMI, Rotors, Station Setup, Towers.