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7 hz antenna

7 hz antenna

195 links and 2 categories about 7 hz antenna on dxzone.com

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Antennas : 15M
  • 21 mhz half wave GP Antenna - 21 mhz half wave ant -very low radiation angle - full size and light weight- all coax matching system - decoupling care to prevent low angle radiation degrade
    [ Hits: 2061 | Votes: 3 | Rating: 2.00 ]
Antennas : 2M
  • 2m VHF antennas with high gain - 2m SSB/CW-12.5 Ohm Yagis with extrem high gain and small bandwidth. These Yagis were constructed as ultra-light, portable Yagis with extrem high gain. They have small bandwidth and are working from 144,0-144,8MHz with good SWR.
    [ Hits: 6807 | Votes: 8 | Rating: 7.63 ]
  • 137 MHz QHF Quadrifilar APT Antenna  updated - This version of the 135MHz quadrifilar antenna for APT reception is an adaptation from Bill Sykes and Bob Cobey's article Taming the QFH which appeared in the March 1997 RIG magazine.
    [ Hits: 5291 | Votes: 27 | Rating: 5.60 ]
Antennas : 40M
  • A 40m Vertical - This antenna is intended as a simple, inexpensive solution for the newcomer to experiment across the 40m band (7.0–7.2MHz) when only restricted space is available
    [ Hits: 8962 | Votes: 5 | Rating: 2.80 ]
Antennas : 4M
  • 70MHz-Yagis - Various Yagi antennas for 70 Mhz band
    [ Hits: 4544 | Votes: 13 | Rating: 6.55 ]
  • Vertical half-wave aerials for 4m - Practical designs pictures and alternative design of antennas for 70 Mhz by Ross Wilkinson G0WJR
    [ Hits: 6548 | Votes: 10 | Rating: 4.59 ]
Antennas : 6M
  • VE7CA 6m antennas - Quad and Yagi portable antennas for 50 mhz by VE7CA
    [ Hits: 4664 | Votes: 7 | Rating: 8.15 ]
  • Two portable antennas for 6-meter - VE7CA reprint an interesting article taken from arrl antenna compendium. Two elegant practical and portable 6-meter gain antennas, a two-element quad and a tree-element Yagi antenna for 50 Mhz-6 meter band
    [ Hits: 4319 | Votes: 1 | Rating: 10.00 ]
  • WB7PMP 4 and 7 eleemts yagi for 50 Mhz - Original drawing and design of a 4 and 7 elements yagi antenna for 50 Mhz
    [ Hits: 1286 | Votes: 6 | Rating: 4.83 ]
Antennas : 80M
  • 80M Vertical antenna with capacitance hat - Simple wire antenna cheap to make, using readily available materials, Low angle radiation, with rejection of high angle signals Wide bandwidth, with resonance at the 80M DX window (3.790-3.800 MHz); and Maximum height is 40 feet
    [ Hits: 22351 | Votes: 22 | Rating: 7.32 ]
Antennas : HB9CV
  • Swiss Quad for 10 and 6 meters - Based on HB9CV, F6ITV decribes how build a swiss quand antenna for 28 and 50 Mhz.
    [ Hits: 17828 | Votes: 18 | Rating: 7.89 ]
Antennas : Horn
  • A Horn Antenna for 2.4 GHz. - This Antenna is not really practical for AO-40 reception, but horn antennas have a number of qualities useful in microwave antenna testing and noise figure measurements.
    [ Hits: 10120 | Votes: 27 | Rating: 3.48 ]
Antennas : Longwave
  • Antennas for 136kHz - A very long and exaustive documentation on building antennas for 136 khz. Includes links to antenna design software for longwave
    [ Hits: 4194 | Votes: 4 | Rating: 8.00 ]
Antennas : Mobile
  • An automatically tuned 7-30MHz mobile antenna - This is a base-loaded vertical antenna that mounts on the car's roof. The loading coil is designed as a variable inductor, with a three-legged chariot that travels up and down inside the coil, with grooved brass wheels running on the coil turns, and driven by a slotted rotor tube.
    [ Hits: 3425 | Votes: 2 | Rating: 1.00 ]
Antennas : Multiband
  • A Magnetic Loop antenna for 7-21 mhz - If you find external wire antennas obtrusive for amateur radio or short wave listening, then this is the antenna for you, is just 1 meter diameter
    [ Hits: 3042 | Votes: 2 | Rating: 5.50 ]
Antennas : Portable
  • Antenna system in a shopping trolley wally - Multiband portable antenna system edited by Andy Foad G0FTD, consisting of an old cb antenna with it's 27Mhz matching coil, an antenna tuner, car battery and a transceiver
    [ Hits: 1711 | Votes: 2 | Rating: 10.00 ]
Antennas : Quagi
  • 408 Mhz Quagi Antenna - PDF file on building the SARA 408 Mhz Quagi antenna
    [ Hits: 1009 | Votes: 6 | Rating: 6.17 ]
Antennas : Satellite
  • K5OE, 70 cm Quagi Antenna - An AO-10 antenna by K5OE, this design is optimized for 436.8 mHz with a 50 Ohm feed
    [ Hits: 4748 | Votes: 4 | Rating: 9.00 ]
Antennas : VHF UHF
  • 900 MHz antenna - VE3CVG's 900 MHz 7 Element Plumber’s Delight Yagi Antenna
    [ Hits: 1029 | Votes: 0 | Rating: 0.00 ]
Antennas : WiFi
  • Mobile 2.45Ghz antenna - A prototype 2.45ghz antenna for mobile use. This antenna has been u sed for surveying signal strength using a variety of free wlan tools.
    [ Hits: 5817 | Votes: 9 | Rating: 5.33 ]
  • 2.4GHz Short Backfire Antenna - My short backfire antenna for 2.45ghz by carl rabe - g6nlc
    [ Hits: 25765 | Votes: 26 | Rating: 5.92 ]
Manufacturers : Amplifiers
  • SSB Electronic USA - manufactures and distributes HF, VHF, UHF and SHF equipment covering 10MHz. - 47.0GHz. Our products include: Wireless LAN / WAN Bidirectional Linear Amplifiers, Low Noise Preamplifiers - LNA's, RF Linear Amplifiers, Relays, Transverter Systems, Frequency Translation Systems, Downconverters, Antennas, Parabolic Dishes, Coaxial Cable, Relays, Antenna Switches, Microwave Test equipment, PC controlled Receivers, Microwave Linear Amplifiers including models for Telemetry, Wireless, and CDMA applications.
    [ Hits: 7315 | Votes: 5 | Rating: 7.00 ]
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: 1639 | Votes: 3 | Rating: 5.33 ]
Software : Weather and FAX
  • ATPDEC - Atpdec is an open source program that decodes images transmitted by POES NOAA weather satellite series. These satellites transmit continuously, among other things, medium resolution images of the earth on 137Mhz. These transmissions could be easily received with an inexpensive antenna and dedicated receiver. For more information about receiving POES satellite images consult the rig site.
    [ Hits: 2298 | Votes: 2 | Rating: 9.00 ]
Technical Reference : SWR Meters
  • Prototype SWR meter for 2.45Ghz - Testing antenna's is a lot easier if you have a good swr meter this is a prototype of a design by g7eyt.
    [ Hits: 8852 | Votes: 7 | Rating: 6.43 ]
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