com 201 antenna

com 201 antenna

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• 35 Element Yagi Antenna for 23cm - Antennas for the 1296 MHz based on the construction plans of some Yagis 35 elements by DL6WU, F9FT, DJ9YW. These antennas features a boom of about 3 m and gives a gain of about 17.8 dBd - by VE2EK
  [ Hits: 211 | Votes: 1 | Rating: 7 ]
• Yagi antenna for 23 cm - Homebrew 23 cm 12 element Yagi Antenna based on the DL6WU design. This articles include several pictures of the yagi antenna along with detailed element size and spacing. - by VK1AD
  [ Hits: 161 | Votes: 0 | Rating: 0 ]

• Rectangular Loop antenna for 2 meter band - An interesting and easy to build loop antenna for VHF bands, that present a feedpoint impedance of 50 ohms thus avoiding the need for a 1/4 wave impedance transformer. This antenna is ideal for sota and other portable operations - by VK1NAM
  [ Hits: 279 | Votes: 1 | Rating: 1 ]
• Lightweight 144 MHz Yagi antenna  ^updated - A Lightweight 2m Yagi for SOTA. The boom is 20mm PVC electrical conduit and the elements are 2.4mm aluminium TIG welding rod. The antenna is carried as a single length of conduit with the elements stowed inside the boom, sealing them in with a bung. The driven element is connected directly to 50 Ohm coax with a BN-43-202 balun core to decouple the coax shield. - by VK3YY
  [ Hits: 180 | Votes: 1 | Rating: 4 ]
• Coax Dipole for 2 meters band - A homebrew 2m 144.2 MHz vertical 1/2 wave Coaxial Dipole antenna project for your home QTH, SOTA, portable field operations/WICEN exercises or the emergency 2m Go-box. Elsewhere in amateur radio circles this antenna is known as a 2m Flower Pot Antenna - by VK1NAM
  [ Hits: 250 | Votes: 3 | Rating: 6 ]

• Ham radio 40-meter dipole: your first antenna - How to home made a custom home made dipole antenna for the 40 meters band, just 66 feet long. Enjoy the band openings during the evening and play morse code or digital modes on this magic band. - by Dave Casler
  [ Hits: 198 | Votes: 0 | Rating: 0 ]

• Slot-Cube Antenna for 6 Meters - Slot cubes are folded skeleton slot antennas with widened, folded dipoles bent into a cube to reduce size. QST Article 12 2019 - by W6NBC
  [ Hits: 584 | Votes: 2 | Rating: 5.5 ]

• 70 cm Helix Antenna - Helix antenna 432/435 MHz 14 turns. This 50 ohm impedance antenna allows, when fed with 25/50W of SSB RF, to join the orbiting satellites like AO-40 and AO-10 very easily - by VE2EK
  [ Hits: 255 | Votes: 2 | Rating: 10 ]

• Build your own HF balun - A balun is a MUST for dipoles or similar antennas when they are feed with coaxial cable. From the RF point of view, the shield can be modeled as two conductors, the internal shield (the real shield, this is, ground) and the external shield, who is really far to be ground. In this way, your dipole has 3 arms, the two from the dipole and the coaxial cable shield (external face) - by EA4EOZ
  [ Hits: 248 | Votes: 1 | Rating: 10 ]

• Testing End Fed Long Wire Antenna - Testing a 27.2 metre end fed long wire antenna,used for SOTA activations placed as an inverted V. The author reports in this article an on the field practical result. - by VK1AD
  [ Hits: 168 | Votes: 0 | Rating: 0 ]

• QRP End-Fed for 40m 20m 10m - This antenna build was strongly inspired by the well known PAR end fed antenna. The matcher box uses a T82-43 Fair-Rite core. - by VK3YY
  [ Hits: 170 | Votes: 3 | Rating: 9.67 ]

• High Performance common-mode chokes - May 2015 Radcom Article on common-mode chokes that can be used for control cables, phone lines, but mostly on typical HF antenna systems. This article explain what common mode chokes does, why you meay need one, properties common mode chokes should have, how to build and measure performances. - by G3TXQ
  [ Hits: 689 | Votes: 1 | Rating: 10 ]

• 13cm Bi-Quad Antenna - A homebrew 2.4 GHz bi-quad antenna for SOTA. Includes several pictures about assembling parts, a list of material and dimensions. - by VK1AD
  [ Hits: 116 | Votes: 1 | Rating: 10 ]

• Moxon Beam for 2m - A home made, dirty and quick moxon antenna for 144 MHz made with PVC pipes. - by G0KYA
  [ Hits: 195 | Votes: 1 | Rating: 9 ]

• Portable VHF UHF Dipole Antenna - A SOTA Lightweight Portable 2m 70cm Dipole Antenna Lightweight portable QRP 2m and 70cm half wave dipole for SOTA or an emergency antenna for the 2m and 70cm Go-box. - by VK1NAM
  [ Hits: 177 | Votes: 0 | Rating: 0 ]

• Homemade 137 MHz Weather Satellive V-dipole Antenna - This is a short version, the final of the article describing how to build the Weather satellite 137 MHz horizontal V-dipole antenna. - by lna4all
  [ Hits: 241 | Votes: 5 | Rating: 9.4 ]

• Z-Match 100 and mini Z-Match - This is a antenna tuner with wide range tuning for antennas with a Z of + 50 Ohms on all the HF bands. - by PD7MAA
  [ Hits: 298 | Votes: 0 | Rating: 0 ]

• Revisiting the Rybakov 806 Vertical Antenna - An article about the Rybakov 806 Vertical antenna. The classic Rybakov configuration is a 7.6m or 8m ( aprox 25 or 26 feet) wire fed through a 4:1 UNUN - by wb3gck
  [ Hits: 457 | Votes: 4 | Rating: 5.75 ]
• 40m center loaded vertical antenna - A 5 metre center loaded vertical for 40m combined with a 4 wire ground plane. - by VK1NAM
  [ Hits: 298 | Votes: 0 | Rating: 0 ]

• Automatic HF Antenna Tuner with Arduino - Make and automatic antenna tuner based on Arduino and using economic card. This ATU Project can be installed outdoors and controlled remotely by an rs485 link - by F4GOH
  [ Hits: 572 | Votes: 3 | Rating: 9.67 ]

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