40 m

40 m

Pages: [prev] ... 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 ... [next]

• Vertical antenna for 160 meter - This high antenna require a large ground composed by 40 radials. It's not very handy expecially in windy situations but is very powerfull in pile-ups. In italian
  [ Hits: 4137 | Votes: 1 | Rating: 10 ]

• VK5AH -HF 4 Bander dipole  ^pop - A multiband 80-40-20-15 meters dipole wire antenna that can be extended to cover 160 meters too.
  [ Hits: 54043 | Votes: 22 | Rating: 6.68 ]

• 40m/80m Portable antenna  ^pop - Portable wire antenna for 40 and 80 meter made with a RF Chocke. Can be adapted to work on 160 meters by adding additional 6.9 meters wire at its end.
  [ Hits: 61553 | Votes: 29 | Rating: 5.96 ]
• N4JTE Antennas - Just Too Easy 40 meter reversible quads in two an three element version
  [ Hits: 2664 | Votes: 4 | Rating: 7.75 ]

• Dipole for 40 meters - Shortened dipole with traps for 40 meters band in portuguese
  [ Hits: 4345 | Votes: 4 | Rating: 5.5 ]

• Receiving antenna for low bands  ^updated - K9AY loop antenna installed at PA6Z Contest group. This is a receiving antennas for the low bands (160m, 80m and 40m). Include schematics and info on a building the control box, preamplifier and low-pass filter
  [ Hits: 19594 | Votes: 12 | Rating: 7.91 ]
• Dual Loop 80 and 40 Meter - A dual loop antenna, ZZ Wave Net HF Wire Antenna Project by VE6VIS. The antenna is basically a full wave 80 meter loop on top and a 40 meter loop on the bottom all supported from a 64 foot center support
  [ Hits: 25275 | Votes: 16 | Rating: 5.38 ]

• Stealth Multiband Vertical  ^pop - A vertical antenna for 40 and 80 meters band, using a telescoping fiberglass fishing pole.
  [ Hits: 52691 | Votes: 17 | Rating: 5.59 ]

• Yagi for 80 and 40 meters - Design plan of an array of a two element yagis for 80m and a 3 element 40m antenna sharing a single 12 meters long boom by EA5DY
  [ Hits: 1735 | Votes: 4 | Rating: 6.5 ]

• Better Feedline Loss Measurements with Antenna Analyzers - Various publications through the years have shown how the SWR measured on a shorted (or open) feed line can be used to calculate feed line attenuation
  [ Hits: 1921 | Votes: 2 | Rating: 10 ]

• Morgain Antenna for 40/80 - Simple and cheap antenna for 40/80 meter band in Italian
  [ Hits: 11247 | Votes: 36 | Rating: 6.3 ]

• EC2APU multiband wire antenna - Wire antenna for 10-15-20-40-80 meters band, with many drawings and description in spanish
  [ Hits: 6598 | Votes: 6 | Rating: 5.17 ]

• SWL Receiving Antenna Ideas - Shortwave radio receiving antenna experiments, on 30 and 40 meters band with pictures, schematics and descriptions.
  [ Hits: 11022 | Votes: 7 | Rating: 7.71 ]

• Old Radio Parts - Vintage and reproduction electronic parts specialist - Antique radio dials and knobs, 1940-1970 era phonograph cartridges, needles, idler wheels.
  [ Hits: 2564 | Votes: 1 | Rating: 10 ]

• RF Amplifiers - Solid State and TWT Amplifiers From 1 MHz to 40 GHz with Power Levels from .1 mil Watt to 2.5 Kw
  [ Hits: 6477 | Votes: 2 | Rating: 8.5 ]

• Work satellite with single IC-706MKIIG - You wanna try to work modern satellite like AO-40 but have only one rig ICOM-706MKIIG ? This article will help you.
  [ Hits: 1123 | Votes: 1 | Rating: 9 ]

• KENWOOD TS-940 Page - Comprehesive page on TS-940 TS-940 reference maintained by ZL4AI Jeff
  [ Hits: 4106 | Votes: 13 | Rating: 8.3 ]

• G3YXM 500 W PA - 40-80-160 meter band linear amplifier
  [ Hits: 3622 | Votes: 3 | Rating: 7 ]
• SUPERVOX - S 300 - AM CW SSB linear amplifier for 160 80 and 40 meter band
  [ Hits: 3267 | Votes: 2 | Rating: 5.5 ]
• LA7MI 40W RF Amplifier for 80m - 40W Linear Power amplifier with FETs for 80m Some notes about saturation in ferrite- and iron-cores. Written by LA7MI Stein Torp, N-5005 Bergen
  [ Hits: 3024 | Votes: 2 | Rating: 1.5 ]

Pages: [prev] ... 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 ... [next]