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Antennas : Antenna Calculators
Amateur Vertical Antenna Calculator
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- This calculator is designed to give the vertical length (height) of a particular antenna, for the frequency and wavelength chosen.
N. American Data Communications Museum
- Telephony technology from telegraph to digital transmission
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
HF Digital DX News
- Great source for digital dx news, with bullettins and newsletters.
US Amateur Radio Frequency Allocations
- US Amateur Radio Band Plans by ARRL
rec.radio.amateur.digital.misc
- Packet and other digital radio modes.
Angle linear
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- 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.
Optoelectronics
- DTMF, RF, decoders receivers and accessories icluding computer interface boards, frequency counters, tone decoders, spectrum sweeper and nearfield receivers
Hoka Electronics
- The WWW home page for information about our specialist range of HF and VHF radio digital signals' analysis and decoding equipment.
Almost all digital electronics
- This site is dedicated to electronics hobbyists, engineers, and Radio Amateurs interested in circuit design, homebrew and kit projects.
Getting Started with Sound Card Digital Modes
- Setting your Amateur radio station up to operate the wide range of
modern radio software which uses the PC sound card to generate and receive signals. Murray Greenman ZL1BPU
Digital Communications Conference
- Hams convene each year at a Digital Communications Conference to evaluate and further the state of the art. TAPR's webserver provides conference papers from previous DCCs as well as information about the upcoming DCC.
T.A.P.R.
- TAPR, an international organization dedicated to amateur digital communications, is pleased to present this collection of information about TAPR, via the World Wide Web.
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
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.
MultiMode
- Digital modes decoding software for the macintosh. Decodes CW, RTTY, WEFAX, SATFAX, ACARS, DTMF, SSTV
RadioRaft
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- 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
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- This is a radio frequency propagation calculator for the transmission path between an RF transmitter and a receiver.
RadioControl
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- 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
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