tr switch

tr switch

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• Reversible RG6 Beverage Antenna - A project about reversible unidirectional Beverage antennas plus a remote switching system conveniently controlled by the operator
  [ Hits: 185 | Votes: 3 | Rating: 7 ]
• Reversible RG6 Beverage Antenna - The author describes building a reversible Beverage antenna for low-band receive applications. He details the construction process, challenges faced, and initial performance testing. The antenna uses coaxial cable and transformers for switching direction. Overall, the author is pleased with the results and plans to build additional reversible Beverages.
  [ Hits: 21 | Votes: 0 | Rating: 0 ]

• Outdoor 80m/40m bands Magnetic loop antenna - No matching adjustments needed. Directly perfect match to 50 Ohms using a remotely switched wideband transformer
  [ Hits: 225 | Votes: 0 | Rating: 0 ]

• Reversible 40 Meter Moxon - The author wants a compact, switchable antenna for 40-meter ham radio. They compare 3 designs: rectangle, short-tipped W6NL, and T-hat. All work well electrically, but mechanics matter for a large antenna. The rectangle needs strong support, while the T-hat is sturdier with slightly longer elements. The T-hat design wins for now, but the author will focus on its mechanical details next.
  [ Hits: 75 | Votes: 2 | Rating: 5.5 ]

• Building a VHF Contest Station - Building an amateur station for competitive radiosport involves a number of critical steps, regardless of the band or bands you focus on. These include, but are certainly not limited to: Station layout, Equipment interconnection and switching, Inter-station interference, Antenna selection. Radio interface with the logging program, CW and voice keyer integration, Rotator control
  [ Hits: 337 | Votes: 1 | Rating: 4 ]

• 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: 190 | Votes: 0 | Rating: 0 ]

• Icom 706MK2G Repair - After years of reliable performance, a 26-year-old Icom 706MK2G exhibited an unusual deviation during FM transmission, with the actual frequency being 10kHz off from the displayed frequency. Additionally, the power meter showed a sharp dip during transmission. Upon investigation, it was discovered that the FM VCO voltage adjust variable had become dirty and sluggish over time. By adjusting the variable capacitor and cleaning it with switch cleaner, the issue was resolved, restoring stable power output and accurate frequency transmission.
  [ Hits: 19 | Votes: 0 | Rating: 0 ]

• Antenna Switch - An home made antenna switch with a Dummy Load selector. If you forget the radio is connected to the open or grounded side of the switch and you try to transmit, it is very easy to damage the finals of your transceiver.
  [ Hits: 322 | Votes: 3 | Rating: 8 ]
• 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: 155 | Votes: 0 | Rating: 0 ]
• OTRSP Antenna Selector - Open Two Radio Switching Protocol Antenna Selector on ATMEL ATmega8 microcontroller
  [ Hits: 92 | Votes: 0 | Rating: 0 ]
• Controlled Antenna Switch - A four position HF antenna switch with PC control
  [ Hits: 232 | Votes: 1 | Rating: 8 ]
• Fully automatic antenna switch project - Cheap and simple fully automatic antenna switching that permit to automatically select the proper antenna based on transceiver status activity.
  [ Hits: 88 | Votes: 0 | Rating: 0 ]
• Smart SO2R Antenna Switcher: A DIY Solution - In pursuit of enhanced station efficiency, the author describes crafting an Arduino-based smart antenna switcher for an SO2R setup. Faced with manual antenna switching challenges during contests, the project utilizes a Logos Electromechanical 4x4 Driver Shield and a Power Screw shield for seamless functionality. Despite its raw appearance, the automatic switcher proves indispensable in contest scenarios, prompting considerations for future improvements and standardization of station control protocols.
  [ Hits: 154 | 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: 38 | Votes: 0 | Rating: 0 ]

• Automatic antenna switch with Arduino Nano - Arduino Nano board based antenna coax antenna switch intended for use with ICOM CI-V protocol. When is used alone with transceiver without PC control (CAT software, any logging software with CAT functionality), the CI-V transceive option in TRX setup shall be set to ON.
  [ Hits: 141 | Votes: 1 | Rating: 9 ]
• The AntennaPi - This is a remote antenna switch I use in my attic to connect transceivers in the basement to multiple antennas in the attic. The goal of this project is to be able to remotely connect one of the antennas in the attic to the only antenna cable available.
  [ Hits: 135 | Votes: 0 | Rating: 0 ]

• Blocking Dynamic Range in Receivers - An explanation of the different procedures and definitions that are commonly used for blocking dynamic range (BDR) measurements. Dynamic range in general is the ratio between the weakest signal a system can handle and the strongest signal the same system can handle simultaneously without an operator switching attenuators or turning volume potentiometers
  [ Hits: 175 | Votes: 0 | Rating: 0 ]

• Arduino Repeater Controller - This blog article introduces an updated repeater controller project utilizing the Arduino UNO. It includes a CW identifier, and the ID message can be customized using hex codes. The author offers a Windows command line program for easier message coding and provides a link for download. The controller features three adjustable timers for IDer, Timer-out, and Squelch-tail. The article also mentions the use of an audio switch to control audio levels between the receiver and transmitter. Detailed instructions and code files are available on the author's website for both version 1 and version 2 of the Arduino repeater controller. The project aims to enhance repeater functionality and audio management in ham radio operations.
  [ Hits: 95 | Votes: 0 | Rating: 0 ]

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