type

type

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• Isolation chokes for 160m verticals - An article on how much impedance you really need and how small can be a chooke for top band vertical antennas by N6LF
  [ Hits: 631 | Votes: 0 | Rating: 0 ]

• 40 Meter Bowtie Antenna - A bowtie antenna is a type of antenna that reputedly provides higher gain at lower radiation angles than a center-fed dipole antenna at heights considerably less than 1/2 wavelength above ground.
  [ Hits: 1423 | Votes: 4 | Rating: 7 ]

• A broadband contest antenna for 80m - The challenge with contest operation on 80m is finding an antenna that works well over the range 3.50 MHz to 3.85 MHz.
  [ Hits: 1293 | Votes: 8 | Rating: 6.88 ]

• Line Loss Calculator - Types of coax-cable with rf attenuator calculator, line loss calculator form includes an antenna gain calculator. This coax loss calculator can help you on choosing the right cable for your antenna sysmte.
  [ Hits: 879 | Votes: 3 | Rating: 6.67 ]

• How to make a HB9CV - The HB9CV is a well known two element antenna of a directional beam type with a forward gain of 4 to 5 dBd. This one is for two metres but it can be scaled, from the dimensions in the diagram, for other bands I have also made them for four and six metres
  [ Hits: 1476 | Votes: 9 | Rating: 4.45 ]

• Poles for portable operations - Reviews of two types of poles used on portable operation to support wire antenna and accessories to plant poles in the ground by N4KGL
  [ Hits: 619 | Votes: 0 | Rating: 0 ]

• The Basics of Patch Antennas - This article explores the basic concepts of patch antennas. Topics include principles of operation, impedance matching, radiation pattern, circular polarization, bandwidth, efficiency, alternative feed types, stacked patches and higher mode behavior.
  [ Hits: 804 | Votes: 1 | Rating: 9 ]

• All About Antennas - A free five part series on antennas that covers many aspects of antennas, from radio wave propagation, to feed lines, type of antennas, connectors, adaptors and antenna switches by Bob Grove, publisher of Monitoring Times
  [ Hits: 1179 | Votes: 3 | Rating: 7.5 ]

• Ham Radio in popular culture - Amateur radio in cartoon type TV shows, Simpsons, Southpark, Family Guy, SpongeBob
  [ Hits: 327 | Votes: 0 | Rating: 0 ]

• Portable antennas - N5KGL interesting article on portable antennas. Greg report his experience on using several types of portable antennas.
  [ Hits: 595 | Votes: 0 | Rating: 0 ]

• Icom IC R7100 Service Manual - PDF File of the IC R7100 communication receiver service manual
  [ Hits: 760 | Votes: 4 | Rating: 4.75 ]

• Numbers stations OWVL - A numbers station, also known as a one-way voice link (OWVL), is a special type of unusual radio broadcast, generally on the Short Wave (SW) radio bands
  [ Hits: 281 | Votes: 1 | Rating: 6 ]

• ADIF Prefix Calculator - This software loads WPX type ADIF files with the tag and calculates the different callsign prefixes. The software will load and capture the totals for big files. ADIF files must have the .adi file extension.
  [ Hits: 284 | Votes: 0 | Rating: 0 ]

• SoDiRa - Windows Software Defined Radio SDR for analogue and digital modulation types. Can decode AM and FM+RDS radio as well as DRM/DRM+ and time signals DCF77/HBG. Sodira supports the use of the RTL-SDR through use of the ExtIO_RTL2832.dll module. Demo version available.
  [ Hits: 1544 | Votes: 10 | Rating: 7.8 ]

• A lithium battery primer - Primary, Ion, and Polymer, a lithium battery primer, learn the differences between and varied uses for these diverse types of lithium batteries.
  [ Hits: 341 | Votes: 0 | Rating: 0 ]

• An Adapter for Cell Phone Headsets - This is a neat little adapter that allows the use of a cell phone type Headset with your Amateur Radio.
  [ Hits: 531 | Votes: 0 | Rating: 0 ]
• Wireless Headset with PTT - The GN9120 is an excellent bluetooth type headset. Here an article about GN9120 Wireless Headset Conversion for Ham Radio with PTT
  [ Hits: 410 | Votes: 1 | Rating: 10 ]

• Arduino CQ Caller - Arduino automatic CW Keyer for amateur radio
  [ Hits: 1466 | Votes: 2 | Rating: 4 ]

• Locating Power Line Noise - RF interference from power lines is caused by arcing as high voltage electricity bridges a gap to a lower ground potential on the power pole. Corroded or loose connections, cracked insulators almost all of the hardware on a power pole can be the source of arcing.
  [ Hits: 427 | Votes: 0 | Rating: 0 ]

• SDR Receiver using a Tube - The build was an experiment to see if a tube receiver could be stable enough to receive digital shortwave radio broadcasts. The tube acts as both an oscillator and mixer, so the receiver is a type of direct conversion receiver.
  [ Hits: 230 | Votes: 1 | Rating: 10 ]

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