relay

relay

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• Phased Delta Loops - An interesting article with many technical details on a phased delta loop array for 80 meters band includes pictures of antenna relays
  [ Hits: 2000 | Votes: 4 | Rating: 10 ]

• OZ1CX - Multiband vertical antenna no tuner LC matched - A 4-Band vertical antenna that needs NO tuner, NO traps. Implement an LC matched on 4 bands with relay switching.
  [ Hits: 1011 | Votes: 1 | Rating: 8 ]

• MCBRN Michigan Citizens Band Radio Network - MCBRN Michigan Citizens Band Radio Network a volunteer group/organization for maintaining two way communications during an emergency, crisis, disaster, or blackout, using CB FRS MURS and WiFi. Includes plans, message relay services, neighborhood watches, large events, encampments and gatherings.
  [ Hits: 162 | Votes: 0 | Rating: 0 ]

• Pikes Peak Radio Amateur Association (PPRAA) - The Pikes Peak Radio Amateur Association (PPRAA) is an American Radio Relay League (ARRL) Special Service Club located in Colorado Springs, Colorado. The PPRAA is a social and technical membership organization which provides educational and recreational activities for its members intended to further their knowledge in the art of radio communications.
  [ Hits: 64 | Votes: 0 | Rating: 0 ]

• Elecraft K2 Preselector Modification - Although most Preselectors are designed with an internal T/R relay, theoretically enabling direct insertion between the transceiver and the antenna, there is a problem when running CW, especially when running full QSK. The switching time of the internal relay is too slow to follow full QSK. The best way to avoid this problem altogether is to insert the Preselector directly into the transceiver’s RX antenna line, thus avoiding entirely the need to switch the Preselector in and out.
  [ Hits: 188 | Votes: 0 | Rating: 0 ]

• Enhancing Icom IC-7300 RX Antenna - Despite the model limitations, such as a single TXRX antenna connector, the author shares a reversible modification involving a coax relay for enhanced functionality, demonstrating the transceiver's adaptability and customization potential.
  [ Hits: 188 | Votes: 1 | Rating: 10 ]

• Hamtech - HAM-made engineering products supplies and produces coaxial relays, antenna switches, sequencers, roller inductors, variable capacitors, low noise preamplifiers, RF power rotary switches and coil bodies.
  [ Hits: 192 | Votes: 0 | Rating: 0 ]

• DXSPOTS - DXSPOTS is a Telnet connection program. It allows radio amateurs with a lot of DX traffic to know instantly the status of the bands and to know which DX are currently on the air. Following the Packet-Clusters where data was transmitted on VHF/UHF via dedicated relays and sometimes on HF at a very low speed (300Bds on HF), the Internet has taken over and is now transmitting DX information via the computers in most shacks. Translated with www.DeepL.com/Translator (free version)
  [ Hits: 149 | Votes: 0 | Rating: 0 ]

• QSO Relay - QSO Relay is a Windows desktop application that listens for contacts being forwarded from WSJT-X/JT65-HF and JTAlertX and write to Ham Radio Deluxe Logbook v6.x database
  [ Hits: 229 | Votes: 1 | Rating: 10 ]

• Five Antennas Switch Box - A project of a 5 Antennas Relay Switch Box, all Switches & Relays have both contacts wired in parallel to improve reliability of operation, to prevent static build up, when an antenna is not in use the feeder coax is grounded.
  [ Hits: 1248 | Votes: 1 | Rating: 10 ]
• Building a SainSmart USB Antenna Switch - Building an automatic 8ch USB Relay switch using an existing Ameritron RCS-8V Remote Control Coax Switch and an externally mounted 5-way switch.
  [ Hits: 153 | Votes: 0 | Rating: 0 ]
• Beverage Remote Switch  ^new - The author describes building a remote switch box to control the direction of two reversible Beverage antennas. The switch uses a buried cable and relays to select the desired antenna direction from the shack. The design is simple and uses common components.
  [ Hits: 37 | Votes: 0 | Rating: 0 ]

• Arduino Rotor Remoter - The Arduino series of boards is currently the ideal choice for a satellite rotor controller. This controller uses an extended Yaesu GS-232 command set to control a Yaesu G-5500 Az-El rotor and four SPDT relays by W9KE
  [ Hits: 1070 | Votes: 0 | Rating: 0 ]
• IC-7300 Arduino Based Antenna Switch - An Arduino Based Antenna Switch For The IC-7300 that monitors the band voltage from the rear accessory socket on the IC-7300. Two RF antenna relays are used to switch to the appropriate output.
  [ Hits: 124 | Votes: 0 | Rating: 0 ]

• Morse Code Beacon Keyer - This circuit stores a morse code message as bits in an EPROM chip, the message controls a relay that keys a CW morse code transmitter. An Arduino processor can also be used in place of this circuit, that eliminates the need to build the circuit and program an EPROM.
  [ Hits: 380 | Votes: 0 | Rating: 0 ]

• QRO Coaxial Relay for 50 MHz - Build a SPDT coaxial relay that can be used as a main Transmit/Receive relay or an A-B switch to select between two different 6m antennas
  [ Hits: 362 | Votes: 0 | Rating: 0 ]

• Repairing HP 8753C VNA - A true detective story about a interesting repair project, putting back to life a malfunctioning HP 8753C VNA that was rebooting after startup with noise and clicking sounds produced by the attenuator and switch relays.
  [ Hits: 98 | Votes: 0 | Rating: 0 ]

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