rf receiving

rf receiving

Antennas : Active

• The PA0RDT Mini-Whip - An active receiving antenna for 10 KHz to 20 MHz, a very small sized antenna with excellent performances in noise to signal ratio.
  [ Hits: 1476 | Votes: 7 | Rating: 7 ]

• How to Make a Great 9:1 RX Transformer - There are lots of good designs for matching transformers for receiving antennas. Make it yourself it's cheap and easy, and very high performance. This is the design used in the TRX-9 transformers.
  [ Hits: 3144 | Votes: 0 | Rating: 0 ]

• Modern Beverage Receiving Antenna - A helpful guide to building your own beverage-type low noise receiving antenna for broadband use. Easy, do-it-yourself suggestions to optimize directional performance, even if you lack a farm to put it on.
  [ Hits: 1630 | Votes: 2 | Rating: 5 ]
• Beverage switch-box - A home made Beverage system for portable use. The goal was to switch between 4 single Beverage antennas without interfering on the other receiving stations.
  [ Hits: 115 | Votes: 1 | Rating: 8 ]
• The Reversible BOGs - The author struggled with receiving antennas on his property. After a standard Beverage on Ground (BOG) antenna failed, he built a Reverse Beverage on Ground (RBOG) using telephone cable. He details construction and testing, finding the RBOG outperformed other antennas in noise level, signal strength, and reception pattern. Software modeling helped optimize the antenna length. Unfortunately, the project ended when telephone cable from the second RBOG was stolen.
  [ Hits: 22 | Votes: 0 | Rating: 0 ]

• The WWVB Receiving Antenna - The construction of this antenna is intended to be inexpensive, fast, and effective. Very capable in receiving WWVB from california.
  [ Hits: 3091 | Votes: 3 | Rating: 9.33 ]

• Wide Band Active Loop Antenna - A shielded broadband (~200 MHz) active loop antenna offers more quiet and relatively less interference reception.
  [ Hits: 611 | Votes: 5 | Rating: 8 ]
• 160 Meters 4 Square Receive Antenna - A four square array receiving antena for the top band, performance is extremely directional and space requirements are really hard to fulfill.
  [ Hits: 180 | Votes: 1 | Rating: 10 ]
• Chokes and Isolation Transformers for Receiving Antennas - Chokes and isolation transformers are essential for receiving antennas to mitigate common mode current, which induces noise and interferes with signal quality. Common mode chokes, formed by winding feedline through ferrite cores, block unwanted current effectively. Proper selection of core material and winding turns ensures resonance near the operating frequency, reducing interference. Isolation transformers further minimize interference, crucial for multi-transmitter stations.
  [ Hits: 59 | Votes: 1 | Rating: 9 ]

• Interference Cancelling System - The use of interference signal cancellation has been around for some time. The idea is to use an auxiliary antenna almost any random length of wire in addition to the main receiving antenna
  [ Hits: 1867 | Votes: 1 | Rating: 3 ]

• Diamond Antenna  ^pop - Base station and repeater antennas, mobile antennas, ,multi-band HF antennas , handheld transceivers, receiving and scanner antennas, power meters, swr meters, power supplies, coaxial switches
  [ Hits: 40120 | Votes: 44 | Rating: 6.99 ]

• RF Systems - RF Systems develops and produces antennas and accessories for governmental and military organisations, shortwave and scanner listeners, radio amateurs, yachting circles and professional users of receiving and transmitting equipment.
  [ Hits: 738 | Votes: 1 | Rating: 10 ]

• National RF, Inc. - National rf provides consulting engineer services, and manufactures direction finding antennas, test equipment, communications receiving equipment and adjuncts, satellite antennas, voice amplification and audio equipment.
  [ Hits: 792 | Votes: 0 | Rating: 0 ]

• VLF-LF And the Loop Aerial - The article discusses the theory of loop aerials for receiving and how they reduce the level of local noise. A Loop Aerial is described suitable for use on the LF and VLF bands together with a circuit of an interface loop tuner and preamplifier. The discussion extends to the problems of amplifier noise and the advantages of tuning the loop.
  [ Hits: 3424 | Votes: 5 | Rating: 5.4 ]

• QRSS CW - Receiving QRSS CW on your PC by G0MRF
  [ Hits: 494 | Votes: 0 | Rating: 0 ]

• Ham Fax - HamFax is an application for sending and receiving facsimiles in amateur radio and for receiving public facsimile broadcasts like weather maps. Supported interfaces are sound cards and the SCS-PTCII from Special Communication Systems.
  [ Hits: 5628 | Votes: 6 | Rating: 6.67 ]

• Tri-Mode Buffer Amplifier Box - The TMB-1 is an RF amplifier unit / receiving accessory that can be used with a low-impedance broadband loop, a high-impedance terminated loop (such as a Pennant, Flag, or Kaz Delta), and whip (telescoping rod) antennas.
  [ Hits: 964 | Votes: 1 | Rating: 1 ]

• Innovative 2m to HF Converter - Ulrich L. Rohde N1UL conceived an outstanding 2m to HF receiving converter with specific requirements, including 144-148MHz to 28-32MHz coverage, low noise, high IP3, and a unique modular design. The design decisions emphasize modularity, absence of preselection, stability, and a passive mixer, showcasing Rohde's distinctive approach.
  [ Hits: 94 | Votes: 0 | Rating: 0 ]