In 2001, NASA launched the Mars Odyssey orbital probe. ... on Mars, there will probably be new propagation modes discovered that are unknown here on Earth. ...
6 Meters The Mystery Band by Marc C. Tarplee, Ph.D. N4UFP 6 Meters: Rhetoric vs. Reality No one is on 6 meters (I ve made over 1500 QSO s on 6 m since 1992) There ...
Basic Wire Antennas Part I: Dipoles by Marc C. Tarplee Ph.D. N4UFP Antenna Overview 1 An antenna is a device that: Converts RF power applied to its feed point into ...
Urban Legends from the world of Antennas. Marc C. Tarplee Ph.D., N4UFP ... myths, distortions, lies, and 'urban legends' surrounding antennas than any ...
FDMDV A New Digital Voice Mode for HF Marc C. Tarplee, Ph.D. N4UFP SC Section Technical Coordinator What is FDMDV? FDMDV is a new digital voice mode developed by ...
Most systems use the HomePlug standard which provides protection for amateur frequencies ... mask that provides 30 dB of filtering in the amateur HF bands. ...
They arrive with random velocities reaching up to 70 km/sec (45 mi/sec) ... a region of space rich in debris, perhaps the leftovers of a destroyed comet. ...
... than SSB (1.1 KHz) Should provide good copy at SNR of 3 dB. How does FDMDV work? ... Where to hear FDMDV. FDMDV activity is concentrated around 14.236 MHz ...
Vertically oriented loops may be erected with one or between 2 supports ... It is not possible for most amateurs to erect a /4 or /2 vertical on 80 or 160 meters ...
All amateur bands with the exception of 30, 17, and 12 meters may be used. ... public with the capabilities of Amateur Radio. ... Included W and VE amateurs ...
More complex circuit: 2 audio transformers, a resistor, and a potentiometer are required ... Potentiometer is used to set audio drive level for the transceiver ...
tribander at 50 ft, located 45 feet from the shack, 55 feet from property line ... This antenna is 67 ft from the shack and 74 ft from the property line, so ...
wire Z ~ 60 ohms Gain ~ 4 dBd) Element Loop Length (in) ... Six Club 6 m Sprint (3rd weekend in July) ARRL September QSO Party (2nd weekend in September) ...
... which US and Canadian amateurs try to work as ... All amateur bands with the exception of 30, 17, and 12 meters may be used. ... Included W and VE amateurs ...
NASA is able to use this frequency, because the 70 cm band ... Ability to rotate the antenna in azimuth and elevation. High transmitter power ( 25 W = 44 dBm) ...