3.5 antenna

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3.5 antenna

23 links

Antennas : 2M
  • QM7 7 elements 144 MHz Yagi-Uda Antenna - The QM7 antenna is a simple 7 elements Yagi with 3.70 m boom length for the lower 144 MHz SSB/MGM band, used it mainly for Sporadic-E and MS contacts. It exhibits a forward gain of 11.35 dBd; i.e. 13.5 dB forward gain over the isotropic radiator, while the F/R is about 12.5 dB
    [ Hits: 5361 | Votes: 15 | Rating: 5.27 ]
Antennas : 40M : 40 meter Magnetic Loop Antennas
  • A magnetic loop antenna for HF  pop - Able to cover all frequencies between 3.5 and about 10 MHz, the loop described here is directional, does not require a radial system, and stands just 1.8 metres tall. The antenna can be put together in a short time and is cheap by Peter Parker VK3YE ex VK1PK
    [ Hits: 100939 | Votes: 46 | Rating: 6.74 ]
  • LA6NCA Loop antenna - Car mount magnetic loop antenna plans from 3.5 MHz to 7.5 MHz, LA6NCA, Larvik, Norway
    [ Hits: 14846 | Votes: 11 | Rating: 3.91 ]
Antennas : 80M
  • Top Loaded Portable Vertical - A 3.5 Mhz top loaded vertical antenna built using 2 elevated radials by DJ9RB
    [ Hits: 2495 | Votes: 0 | Rating: 0 ]
  • Short Dipole for 80 m - This short dipole antenna has been described by Nadisha, 4S7NR and may be of interest to anyone wishing to get on 80M (3.5MHz) that have limited space available.
    [ Hits: 1342 | Votes: 1 | Rating: 7 ]
  • Horizontal Loop for 80 meters - Modelling an horizontal Loop antenna at 3.5 MHz
    [ Hits: 1036 | Votes: 2 | Rating: 5.5 ]
  • 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: 1292 | Votes: 8 | Rating: 6.88 ]
Antennas : Dipole Antennas : Four Square
  • 80M 4-Square - An antenna project to obtain a bigger signal on the 80 Meter (3.5 to 3.8 MHz) amateur radio band
    [ Hits: 836 | Votes: 0 | Rating: 0 ]
Antennas : Magnetic Loop
  • MAGLoop Antenna  pop - Magnetic loop antenna for 10-30 MHZ, 3.5-10 MHZ, description, construction details, homemade.
    [ Hits: 25461 | Votes: 18 | Rating: 5.34 ]
Antennas : Multiband
  • G5RV Antenna  pop - The G5RV antenna, with its special feeder arrangement, is a multiband centre-fed antenna capable of very efficient operation on all hf bands from 3.5 to 28 MHz
    [ Hits: 75166 | Votes: 98 | Rating: 6.32 ]
  • HF Multiband end fed antennas - A multiband end-fed antenna that cover 3.5 to 30 Mhz using a 1:64 Balun based on a FT240-43 core
    [ Hits: 3723 | Votes: 6 | Rating: 4.67 ]
Antennas : NVIS
  • Portable NVIS Loop for 80m to 40m - A portable (15.5 foot diameter) NVIS loop for 3.5 to 7.3 MHz. Performs well at high and low takeoff angles, and has smaller footprint than most NVIS antennas.
    [ Hits: 363 | Votes: 0 | Rating: 0 ]
Antennas : Windom
  • I7SWX Coax-Fed multiband antenna - This simple multiband antenna works on all HF bands from 3.5 to 30 MHz, including WARC bands other than 10.1 MHz.
    [ Hits: 4072 | Votes: 6 | Rating: 4 ]
  • Windom Antenna 3.5-30 MHz - A windom multiband antenna project with pictures and diagram for the 6:1 balun
    [ Hits: 3468 | Votes: 10 | Rating: 6.7 ]
Manufacturers : Antenna Tuners
  • HA8DU Antenna Tuners - HA8DU European manufacturer of quality amateur radio antenna tuners for HF Bands, from 10 meter to 160 meters band. Products includes manual and automatic antenna tuners, power handling till 3.5 KW. HA8DU produce even custom made variable capacitors and rotary switches.
    [ Hits: 396 | Votes: 4 | Rating: 7.5 ]
Manufacturers : Antennas
  • ITELITE Antennas - ITELITE manufactures omnidirectional, sector and directional antennas 900 MHz 2.4 GHz 3.5 GHz 5 GHz 5.8 GHz antennas.
    [ Hits: 839 | Votes: 6 | Rating: 7 ]
Manufacturers : Antennas : VHF UHF Microwave : Quad Antennas
  • SuperPass Company Inc. - Antenna manufactuer, Panel antennas, sector panel antennas, high gain for ISM, MMDS, PCS, GSM, CDMA, TDMA, 400MHz, 900MHz,1.9GHz, 2.4GHz, 2.7GHz, 3.5GHz,5.8GHz. Broadband wireless applications for ISP,ASP.
    [ Hits: 1985 | Votes: 4 | Rating: 5.5 ]
Operating Modes : Radio Direction Finding
  • A low power 3.5MHz ARDF transmitter - This low power transmitter is developed for ARDF exercising purposes but of course can be used as super QRP transmitter either. With 1 or 2 meter wire as antenna and a ARDF receiver with ferrite-rod antenna the range is about 100m but with better antennas and a 'real' receiver the range is probably much larger.
    [ Hits: 2041 | Votes: 4 | Rating: 6.5 ]
Technical Reference : Receivers
  • A 3.5MHz Receiver for SSB and CW - Homemade receiver for 80 meters band. The receiver works very well (in fact better than some of its successors), especially the AGC makes listening to 80m QSOs a real pleasure. Sensitivity is not cutting-edge, but on a full-size short-wave antenna it is by fare sensitive enough.
    [ Hits: 248 | Votes: 2 | Rating: 6.5 ]

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