More about Antenna (87)

1-11-1992 | This is a short, efficient, horizontal indoor spiral transmitting / receiving antenna, using 139 feet (approx. 42 m), that can be compa...

1-10-1992 | This design goes to show that low noise and substantial amplification can go hand in hand in a single amplifier with excellent wideband ch...

1-09-1992 | This transmitter was designed to provide a frequency-stable, near-fool-proof, RF power source for use in the initial design of new types of...

1-07-1992 | Most VHF/UHF amplifiers for use with a symmetrtcal antenna (such as an open or closed dipole) have a balun at the input. A balun (short...

1-07-1992 | This converter enables long-distance (DX) reception of AM or SSB stations in the 27-MHz citizens' band (CB) on a short -wave or medium wav...

1-07-1992 | The original experimental QTC transmitting loop antenna was built in late 1990, tested immediately, and details were published in the June...

1-03-1992 | Older readers will remember the original flat-top antennas of the 1920s, 30s and 40s festooning battleships and other warships, ocean-goi...

1-02-1992 | Powerful transmitters operating on medium and long waves may cause considerable interference in the reception of short-wave signals. A hig...

1-12-1991 | This simple to build antenna booster offers a gain of some 20 dB over a frequency range that covers the VHF FM radio band and the whole of...

1-11-1991 | The quadriform is an experimental 3.5 MHz transmit/receive antenna of mini dimensions, consisting of four high-grade robust ferrite rods i...