40 m

40 m

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• A 5 elements Vee log-yagi for 10m - 5 elements "vee" log-yagi for 10m band- boom lenght : 4mt. Gain : over 10 dBd , f/b =over 40 db (deep null) f/b= min 20dB for different polarization signals
  [ Hits: 4609 | Votes: 11 | Rating: 7.82 ]

• 40-80 Half-Extended Double Zepp Antenna - A dual-bander for 80M and 40m. An Extended Double Zepp (EDZ) is a 5/4 wavelength center-fed dipole. This article will introduce the Half-Extended Double Zepp (HEDZ) which has characteristics that a lot of amateur radio operators should find quite interesting
  [ Hits: 11401 | Votes: 9 | Rating: 4.44 ]

• K4TX Delta Loop for 40 Meters - 40 Meter 2 Element Parasitic Delta Loop wire antenna with pictures of delta loop assembling
  [ Hits: 7081 | Votes: 13 | Rating: 7.54 ]

• Shorty Forty Antenna - Short dipole antenna for 40 meter ham band. Can be put up in the space required for a 20 meter dipole.
  [ Hits: 12445 | Votes: 8 | Rating: 7.74 ]
• Trapped dipole for 40-80-160 meters  ^pop - Build a space efficient trapped dipole antenna for 40-80-160 meter bands using RG-58 and PVC pipe by W8NX
  [ Hits: 96980 | Votes: 119 | Rating: 6.24 ]

• W7AV 40 Meter Half Square - These antennas offer big gun DX performance on the low bands, yet they are surprisingly simple to build. Try one- you will like it!
  [ Hits: 4048 | Votes: 4 | Rating: 6.25 ]
• 40 M. triangular full wave vertical loop - A 40 meters band full wave antenna project plan with model, adding the Missing Leg to the Inverted-L Antenna
  [ Hits: 13292 | Votes: 11 | Rating: 7.08 ]

• Portable Magnetic Loop Antenna Version 2 - A simple multi-band magnetic loop antenna designed for 20, 30 and 40 metres. For its size, the performance of the antenna always astounds me, although it is never going to replace a Yagi
  [ Hits: 5350 | Votes: 1 | Rating: 10 ]

• YLRADIO - Full wave delta loop - This Delta Loop is a three-sided antenna suspended high in the air by vertical supports, such as tall evergreen trees. Recommended height is 40 feet or more at highest point, but higher is better.
  [ Hits: 13022 | Votes: 8 | Rating: 7.5 ]

• K5UA 40 meter Phased Array - The intent of this site to share information about the design of a 40 meter horizontal phased array antenna.
  [ Hits: 3415 | Votes: 5 | Rating: 7 ]

• 40 meter shortened dipole - M0MCX - Interesting little project with a couple of loading coils by M0MCX
  [ Hits: 14308 | Votes: 11 | Rating: 6.55 ]

• End fed halfwave antenna and matching unit - One is an EFHWA for 20-40 meters, and the other is a matching unit for the antenna by n0lx
  [ Hits: 10398 | Votes: 5 | Rating: 5.4 ]

• J-Pole antennas for 2m-40m - A multiband jpole antenna
  [ Hits: 15314 | Votes: 12 | Rating: 6.5 ]

• LU9DPD Windom dipole - A multiband windom dipole antenna for 80 40 20 10 meters, feeded with a home made 4:1 balun, in spanish.
  [ Hits: 5342 | Votes: 5 | Rating: 6 ]

• Copper Cactus Single Coax Feed - Single Coax Feed to Multi-Band Copper Cactus Antenna.
  [ Hits: 1325 | Votes: 1 | Rating: 10 ]

• Bromley Repeater Group - Gateway - Website and Forums of The Bromley Repeater Group which has been formed to launch and maintain the new Kent repeater, GB3OK. Located in Orpington and with an ASL of 600 feet, it's predicted to provide coverage over a large area of London and South East England. Also on Echolink node 280040
  [ Hits: 608 | Votes: 6 | Rating: 8.17 ]

• GS Manufacturing - HF Mobile and maritime antennas for 40-80-160 meters
  [ Hits: 1654 | Votes: 5 | Rating: 9 ]

• ZeroFive Antennas - Vertical antennas for all HF bands, expecially 80 40 20 meters bands
  [ Hits: 7084 | Votes: 40 | Rating: 9.24 ]

• OZ4HZ APRS tracker - The 4Hz tracker - APRS tracker with AT89C4051, now also with 5W transmitter onboard.
  [ Hits: 1060 | Votes: 8 | Rating: 8.87 ]

• 5 Watt 40 Meters transmitter - This circuit is unique in that it uses a power mosfet as a final rather than a conventional bipolar transistor.
  [ Hits: 8446 | Votes: 7 | Rating: 5.29 ]

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