transmission lines

Grounding is key to good reception  ^pop - Guidelines to groundings.

What tuners do - How atenna tuners works and what are real effects on feed lines and maximun power output by G3TXQ

N. American Data Communications Museum - Telephony technology from telegraph to digital transmission

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

NCDXF/IARU Beacon List - This table gives the minute and second of the start of the first transmission within the hour for each beacon on each frequency.

PA1CW Henk - Contest, Antennas, Rotating Towers, Rotors, Guywires, CoaxHardlines, Specs and more

rec.radio.amateur.space - Amateur radio transmissions through space

Kantronics - Kantronics produce Modems, Tnc, Kam, Marine, wireless modems. Packet radio communication devices, HF E-mail, paging, GPS tracking, weather data gathering, or wireless data transmission.

First radio signal over Atlantic - Description od Marconi's first transmission over Atlantic Ocean

Morse Code Teaching Machine - morse code machine to learn cw transmission

SSTV Transmission Modes - General characteristics of SSTV transmission mode

VHF UHF Microwave Radio Propagation - Notes on radio propagation in that part of the spectrum (upper VHF to microwave) used by experimenters for high-speed digital transmission

S marks the spot - Forecasting powerful solar explosions several days in advance now be possible

Sunspot activity by NASA - Sunspot cycle closely following prediction by Science @ Nasa

FT-950 mod - expand TX - Yaesu FT-950 MARS/CAP extend transmission to 1.8-30Mhz and 50-54Mhz.

Writing useful reception reports - Useful guidelines and suggestions on writing reception reports

ADDX programs schedule - List of transmissions compiled and updated by Andreas Volk, you can choose the language among a large choice. Website is in german.

AirNav Selcal Decoder - AirNav Selcal Decoder enables you to decode in realtime Aviation HF Selcal transmissions. It only needs an HF airband receiver and your Sound Card. No special hardware needed. With AirNav Selcal Decoder you do not need any other hardware decoding system. Just your PC and the Sound Card.

Finite difference program - This software is able to calculate the properties of odd shaped transmission lines. Particularly good in valve amplifier design, for aiding the design of transmission line resonators.

Voice Descramble - This program descrambles band inverted encrypted transmissions, usually found on VHF/UHF. It uses a NCO (numerical controlled oscillator) to re-produce the originally inverted audio band.

HamComm 3.1  ^pop - DOS Freeware popular program for ham radio communications, supports reception and transmission of radio teletype RTTY, AMTOR ARQ/FEC, SITOR A/B, NAVTEX and Morse code (CW) signals. A decoder for SHIP and SYNOP reports from weather stations is also included. This program is discontinued and unsupported. Originally developped by Schroeder DL5YEC

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

BTL Blaster TeLetype - High performance RTTY reception and transmission software, need a Sound Blaster compatible sound card.

FTV  ^pop - FTV is an MS-DOS program used to receive images from Weather Satellites and Terrestrial Facsimile Stations, text transmissions from radio telex services, Morse code, as well as Amateur Radio FAX, SSTV, RTTY and CW signals. It can also be used to transmit FAX and SSTV. No external hardware, other than a radio, is required, as all the necessary signal processing is implemented in software.

SkySpy ACARS  ^pop - SkySpy is a software program combining a decoder and a database in order to decode ACARS transmissions, the digital data link between commercial aircraft and ground stations, demod ACARS FAX METEO POCSAG HAM