out of band

out of band

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• Mag Loop for 40 m - A page about a Magnetic loop antenna project for the 40 meters band, includes nice pictures and history of construction
  [ Hits: 2443 | Votes: 11 | Rating: 7 ]

• Mini-Whip Active Antenna - This HF active antenna is a build of the PA0RDT Mini-Whip from a kit, it covers the entire HF band (3 to 30 MHz) and below (supposedly down to 10 kHz). It is powered by an external 12-15V supply, consuming about 50 mA.
  [ Hits: 95 | Votes: 0 | Rating: 0 ]

• The Double Bazooka Antenna - A Review - Here is a review of the 40 and 80 meter band Double Bazooka antennas as used on the HF shortwave bands.
  [ Hits: 1132 | Votes: 4 | Rating: 5.5 ]

• Halo Antenna for 50 MHz - A well documented article about construction and analysis of a horizontally polarized halo antenna for 6 meters band by Dr. Carol F. Milazzo, KP4MD
  [ Hits: 1504 | Votes: 5 | Rating: 5 ]

• Homebrew traps - Traps can be one way round multiband coverage without the need of an atu. Learn how to homebrew your own traps
  [ Hits: 3770 | Votes: 3 | Rating: 5.33 ]

• Getting The Most Out Of LowFER Antenna - Getting the most out of LowFER transmitting antennas, designing an efficient antenna for the 1750-meter band by K0LR
  [ Hits: 754 | Votes: 0 | Rating: 0 ]

• HF / VHF Mobile Antenna by K0EMT - A 10 Bands mobile antenna for about the price of 2 mobile monobanders.
  [ Hits: 2517 | Votes: 1 | Rating: 1 ]

• Errante's 225 Ohm multiband HF antenna - Unlocking the full multiband potential of the 225 Ohm elementary radiator in a folded monopole, dipole-like or turnstile layout, by Francesco Errante
  [ Hits: 1303 | Votes: 3 | Rating: 7 ]
• The N3UJJ Antenna Project - The N3UJJ antenna project,parallel-cage dipole a multi-band horizontal antenna, without the need of an antenna tuner.
  [ Hits: 755 | Votes: 2 | Rating: 10 ]

• OCF Dipoles - About windom antennas and OCF dipoles, tricks on covering more bands moving feed-points and potential problems. Problems caused by common mode currents in OCF dipoles
  [ Hits: 670 | Votes: 0 | Rating: 0 ]

• Antenna resonance and bandwidth - About antenna or aerial resonance and bandwidth and the impact of RF antenna resonance and bandwidth on radio communications systems.
  [ Hits: 420 | Votes: 0 | Rating: 0 ]

• Discone antenna - About the basics of what is a discone antenna for wide band or bandwidth omnidirectional applications
  [ Hits: 925 | Votes: 1 | Rating: 2 ]

• Occupied bandwidth of CW - About keying speed affecting occupied bandwidth of a transmitter.
  [ Hits: 337 | Votes: 2 | Rating: 4.5 ]

• FL2100 - 12 meter band mod - Adding a full power output 12 meter band capability to the Yaesu FL-2100 despite of 10 meter.
  [ Hits: 547 | Votes: 1 | Rating: 1 ]

• Beacons app for Windows - Shows which beacon is currently transmitting on the selected radio band Displays information about transmitting beacon Informs about direction and bearing from users position towards transmitting beacon
  [ Hits: 881 | Votes: 0 | Rating: 0 ]

• 2.3GHz ATV TX - Ian G6TVJ design for a synthesised ATV transmitter covering the 13cm band and beyond up to about 2.6 GHz.
  [ Hits: 580 | Votes: 2 | Rating: 7 ]

• Measuring Zs in solid-state amplifier - Measuring the output impedance (Zs) of solid-state broadband HF amplifiers operating in class AB eham article by ZS6BIM
  [ Hits: 488 | Votes: 0 | Rating: 0 ]

• The Minima QRP HF RTX - The Minima is a simple and easy to operate transceiver for all the HF bands with a crisp receiver, a clean output and component cost of less than $100
  [ Hits: 1252 | Votes: 3 | Rating: 6.67 ]

• Homebrew 40m CW Transceiver - 7N3WVM homebrew project of a 3 W output CW transceiver on 7 MHz band
  [ Hits: 1481 | Votes: 0 | Rating: 0 ]

• Wideband SWR meter - About SWR, and use of SWR Meter, home made a swr meter.
  [ Hits: 5562 | Votes: 7 | Rating: 7.43 ]

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