sw antenna

sw antenna

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• JA7KPI Windom antenna for 40-80 - The total length of this antenna is 41m, height is about 11m, and diameter of element is 2mm. JA7KPI modified this antenna originally used as Inverted-V type of 80m band Dipole. Works on 40 - 80 meters band with acceptable swr.
  [ Hits: 7715 | Votes: 8 | Rating: 6.25 ]

• VE7CA portable tribander yagi - 30/17/12 and 20/15/10-Meter Tribanders and a 40 meters inverted V wire yagi antenna
  [ Hits: 2653 | Votes: 1 | Rating: 5 ]

• An improved 40-80 double extended zepp - Article originally published in ARRL compendium by N6LF revisits the classic double extended Zepp to improve pattern and SWR bandwidth. The DEZepp is essentially two end-fed collinear dipoles.
  [ Hits: 18765 | Votes: 10 | Rating: 6.53 ]

• Antenna Feeders - Different types of feeders, SWR and matching
  [ Hits: 492 | Votes: 1 | Rating: 2 ]
• HF Antenna Switch - The purpose of this remote antenna switch was to be able to select between four different antenna combinations The unit was designed to work at RF power levels of around 100 watts by G8JNJ
  [ Hits: 954 | Votes: 0 | Rating: 0 ]
• The Coaxial Line - Impedance matching, Transmission Lines, Characteristic Impedance, VSWR & Mismatch and Antenna Losses
  [ Hits: 888 | Votes: 0 | Rating: 0 ]

• Log Periodic of Another Sort - A log periodic dipole array (LPDA) antenna design that offer continuous low SWR in 13-30MHz range
  [ Hits: 4819 | Votes: 2 | Rating: 9 ]

• Loop Antenna News and Information Forum - This is the Loop Antenna Group to Ask Your Questions, Get Answers and Information about Loop Antennas for improved your Radio Listening and Enjoyment.
  [ Hits: 1409 | Votes: 1 | Rating: 1 ]

• 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: 5036 | Votes: 4 | Rating: 8 ]

• Balcony antennas - What is the best balcony antenna? what antenna would you recommend for use on typical hotel balcony? Read some answers here
  [ Hits: 9809 | Votes: 2 | Rating: 1.5 ]

• Wire receiving loop antenna - A quick and easy to build loop antenna for shortwave listeining can tune from 5 to 18 Mhz
  [ Hits: 6384 | Votes: 8 | Rating: 4.38 ]

• Importance of noise reduction in wires antennas - An old post by John Doty about effects of noise in longwire antenna.
  [ Hits: 1663 | Votes: 0 | Rating: 0 ]

• Multi Band Antenna Traps - These devices are called Traps, but they are actually more like frequency sensitive switches. They are parallel resonant, high Q, tuned circuits which provide a very high impedance at their frequency of resonance.
  [ Hits: 4851 | Votes: 3 | Rating: 6 ]

• The EZ-Tuner - The "EZ-Tuner" is a homebrew automatic legal-limit antenna tuner that covers all amateur HF bands from 160-10 meters. Using a T-network design and controlled by a BASIC Stamp BS2sx microcontroller, the EZ-Tuner will match at least a 16:1 VSWR for either unbalanced or balanced transmission lines.
  [ Hits: 5569 | Votes: 1 | Rating: 9 ]
• Antenna Tuning Unit - This homebrewed antenna tuning unit also incorporates a 50-ohm QRP dummy load, power meter (1 or 10 Watts full scale), and SWR meter
  [ Hits: 7287 | Votes: 5 | Rating: 6.2 ]
• Switched inductor L match tuner - A 10 to 80 meters band qrp antenna tuner by KC8AON, based on Steve Weber, KD1JV "ALT or Altoids L Tuner"
  [ Hits: 6468 | Votes: 9 | Rating: 7 ]

• HB9FX Internet Remote Base JN37XH Hochwacht Zofingen Switzerland - Online web receiver powered by OpenWebRX based in Switzerland. You can isten between 10kHz - 10GHz frequencies. Receiver is operated by HB9BHU Rig VLF/HF/VHF: Airspy HF+, Magnetic Loop/Discone Rig SHF X-Band LNB, RTL-SDR, Stacked Slot Antenna
  [ Hits: 14069 | Votes: 111 | Rating: 6.7 ]

• microHAM - Accessories for your hamshack, such as Band Decoders, various types of Antenna Switches, Antenna Stacking devices, special devices designed dedicated for the SO2R operating technique, USB Interfaces, cw keyers and many others
  [ Hits: 3605 | Votes: 2 | Rating: 10 ]

• A Coax Switch - An inexpensive coax switch. shows a proven inexpensive home-made antenna selection switch. If you question the use of a cheap slide switch and SO239 coax sockets, read on. Measurements in a physics lab showed there to be practically no reflection on HF and even on 70 cm the SWR was below 1.3 : 1
  [ Hits: 9680 | Votes: 8 | Rating: 7.5 ]
• Beverage antenna switch - How could we share the Beverage antennas on more than one station using this homemade remote antenna switch, a project by TK5EP
  [ Hits: 1655 | Votes: 1 | Rating: 10 ]

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