40m band

40m band

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• Shortened dipole for 10 & 40m bands - A shorten Dual-Band Dipole with overall length of about 11 m. For this antenna traps are substituted by inductors, in order to cover the 10 & 40 m. Bands.
  [ Hits: 4138 | Votes: 1 | Rating: 1 ]

• Invisible DX antenna for the low bands - Article by DK5WL describes a multi-band DX antenna for the 160m-40m amateur radio bands with low visibility but great performance for long distance communication.
  [ Hits: 7009 | Votes: 8 | Rating: 6 ]

• Parasitic Delta Loops for 40m - A 2 element 40 meters band parasitic delta loop antenna project with pictures and details
  [ Hits: 903 | Votes: 1 | Rating: 1 ]

• Dual Band Dipole 20-40m - A simple dipole built for two-band operation can be used for portable use and operate 20 and 40 meter bands
  [ Hits: 7171 | Votes: 10 | Rating: 6.94 ]

• Vertical Moxon for 40 meters - A vertical half-moxon for the 7 Mhz by F6IRF
  [ Hits: 2828 | Votes: 1 | Rating: 7 ]
• Vertical Antenna for 7 MHz - DF9CY experience on a vertical antenna for 40 meter band
  [ Hits: 1588 | Votes: 4 | Rating: 3.75 ]

• 3 elements Yagi for 7 MHz - A 3 element yagi beam for 40 meters band
  [ Hits: 4947 | Votes: 7 | Rating: 5.71 ]

• A Junkbox Multiband Bugstick - A junkbox bugstick for 20m, 17m, 15m, 12m, and 10m bonus at the bottom a junkbox bugstick for 40m
  [ Hits: 1704 | Votes: 1 | Rating: 8 ]

• Vertical antenna for Vacation - Vertical Vacation Antenna for 80, 40 and 20 Meter-Band, by Herbert OE3BMB This antenna is a full size λ/4 for 20m and 40m band, and a shortened λ/4 for the 80m band. Generally on the 40m band the SWR is under 1,6. In 80m and 20m band at the resonant frequency the SWR is about 1,1.
  [ Hits: 5037 | Votes: 4 | Rating: 8 ]

• 40 Meter NVIS antenna - Near Vertical Incidence Skywave (NVIS) and the 40 meter Novice Sub-band.
  [ Hits: 1664 | Votes: 0 | Rating: 0 ]

• Vertical Dipole for 40 Meters band - A lightweight portable vertical antenna for 40m
  [ Hits: 1059 | Votes: 3 | Rating: 6.33 ]

• G8JNJ Broadband HF Vertical Antenna - G8JNJ Broadband HF Vertical Antenna - Requires no tuner - great results from 40m to 10m plus 80m & 6m with reduced performance
  [ Hits: 4679 | Votes: 4 | Rating: 7 ]
• Vertical Dipole 10-40m - A multiband vertical dipole antenna by ON4BAI
  [ Hits: 1297 | Votes: 2 | Rating: 9 ]

• 40M Inverted Vee - This simple antenna can be used in various configurations for 40/80/20 or any WARC band or a combination of them
  [ Hits: 3835 | Votes: 1 | Rating: 10 ]

• 40m linear amlifier made by 9A6A - Pictures of a monoband linear amplifier for 40m band - 2 x QB5/1750 made by 9A6A
  [ Hits: 810 | Votes: 1 | Rating: 10 ]

• 440Mhz Interdigital Bandpass Filter - Homebrew Amateur Radio 440Mhz Interdigital Bandpass Filter
  [ Hits: 577 | Votes: 1 | Rating: 1 ]

• Homebrew 40m CW Transceiver - 7N3WVM homebrew project of a 3 W output CW transceiver on 7 MHz band
  [ Hits: 1481 | Votes: 0 | Rating: 0 ]
• The Rock-Mite CW Kit - The Rock-Mite is a 40m CW kit offered by Small Wonder Labs . It features built-in keyer, direct conversion receiver with a crystal RF bandpass filter, 500 milliwatts of power, and switchable frequency offsets to work around QRM
  [ Hits: 1157 | Votes: 0 | Rating: 0 ]

• 40 m Band Direct Conversion Receiver - Practical and usable direct conversion receiver for the 40 m CW band
  [ Hits: 1501 | Votes: 2 | Rating: 6 ]

• LY1GP software defined radios - TinySDR for 80m band and ZetaSDR for 40m band
  [ Hits: 1697 | Votes: 6 | Rating: 6.83 ]

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