2 cable
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Antennas : 2M- Squarooka Antenna - squared bazooka for 2 meters band
- Sort of similar to the one of the 6m omni. Instead of using twin-lead, this design makes use of a more or less regular double bazooka antenna (coaxial dipole). Your attention shall be drawn to the available standart literature, such as Rothammel.
In order to "compute" the dimension, Karl Rothammel mentioned that the total length of the dipole shall be 95% of the free-space wavelength. The short-circuit bridges (closing the folded dipole) are to be placed at a distance-fraction being equal to the velocity factor of the coax cable used, which will be 66% using RG-58 or RG174.
[ Hits: 353 | Votes: 0 | Rating: 0 ]
- Build your own HF balun
- A balun is a MUST for dipoles or similar antennas when they are feed with coaxial cables. Many hams connect the center conductor of the coaxial cable to one side of the dipole, and the shield to the other. Wrong!
[ Hits: 1639 | Votes: 5 | Rating: 5 ]
- Bazooka Antenne
- A bazooka antenna design in German with dimensions for 20m and 40m band with RG174 coax cable stronger than the common RG58
[ Hits: 1267 | Votes: 3 | Rating: 4.67 ]
- Trap on Coax Cable
- A trap on the coaxial cable, also known as choke, helps to eliminate the sneaking of the reflected RF- energy to the shack. The trap can be made from the coaxial cable that feeds the antenna
[ Hits: 961 | Votes: 2 | Rating: 6.5 ]
- Build your own RF-Choke
updated
- How to make an effective RF Choke. The coiled coax choke is the easiest to make but also the least effective. This article includes some general guidelines for winding coax chokes on a 10cm PVC pipe using RG-58 or RG-213 coax cable.
[ Hits: 783 | Votes: 12 | Rating: 7.33 ]
- Programming Yaesu FT-8800R
- Programming the FT-8800R via the front panel and microphone keypad is not extremely difficult. Already having a list of local repeaters in CHIRP, the addition of a USB cable would allow you to coordinate the memory layout across multiple radios with ease.
[ Hits: 297 | Votes: 1 | Rating: 1 ]
- UKW-Berichte Telecommunications
- On-line shop for coax cables, RF connectors, Lightning protectors, Create antenna rotators, antenna masts and mounts, amateur antennas by FlexaYagi, Tonna F9FT, ANjo-Antennen and M2 Antennas based in Eggolsheim Germany
[ Hits: 268 | Votes: 0 | Rating: 0 ]
- Barest of bones APRS RF position reporter
- Super Simple APRS Position Reporter. This project idea has been in response to the more hardware heavy Raspberry Pi projects that involve extra TNC hardware, additional sound cards, and custom cabling. This APRS position reporter is done using a Raspberry Pi B+, USB GPS receiver, Baofeng UV-5R, and a mono 3.5mm audio cable between the Pi and HT.
[ Hits: 182 | Votes: 0 | Rating: 0 ]
- Check coaxial cable with a multimeter
- How to check coaxial cable with a common multimeter
[ Hits: 1756 | Votes: 12 | Rating: 7.49 ]
- Yes, all my Coax Cables are 75 Ohms
- CO2KK exposes some myths about using 75-ohm feedline with 50-ohm rigs and show how to build a cotanget transformer
[ Hits: 1305 | Votes: 3 | Rating: 8.67 ]
- All about coax cables
- Coax cable nomenclature, the RG Family, line loss explained, importance of shieding on coax cables, velocity factor explained, and differences among stranded vs solid wire
[ Hits: 217 | Votes: 0 | Rating: 0 ]
- Car Power Adapter to Anderson PowerPole
- A useful and simple project to convert an unneeded car power cable to an Anderson PowerPole adapter.
[ Hits: 143 | Votes: 0 | Rating: 0 ]
- Custom pigtail cable with Anderson PowerPole connector
- In this post, we describe how to make a pigtail cable to connect the Kenwood TH-F6A triband HT to a 12Vdc power source via an Anderson PowerPole connector.
[ Hits: 120 | Votes: 0 | Rating: 0 ]
- RF Cable Testing
- The cable testing approaches discussed in this article gives an idea about the electrical characteristics of a coaxial cable. Velocity of Propagation, Characteristics Impedance, Return Loss Measurement and more
[ Hits: 450 | Votes: 2 | Rating: 4 ]
- Coaxial Cable Tester
- A simple coax cable tester built based on the KG0ZZ project.
[ Hits: 909 | Votes: 1 | Rating: 10 ]
- Car power adapter to Anderson Powerpole
- In this article we share a useful and simple project to convert an unneeded car power cable to an Anderson PowerPole adapter.
[ Hits: 170 | Votes: 0 | Rating: 0 ]
- Ham Radio TVI in the 21st Century
- Ham radio transmissions can interfere with television reception. This is called television interference, or ham radio TVI. Consumer adoption of cable television has significantly reduced ham radio TVI. But the introduction of IPTV, or television over phone systems, has brought ham radio TVI back, often with a vengeance. Here's why
[ Hits: 322 | Votes: 0 | Rating: 0 ]
- Kenwood KPG-46
- Schematic diagram for the Kenwood KPG 46 programming cable interface for Kenwood TM 271E TK 71 TK 81 TK 7302 NX 700 NX 800 series
[ Hits: 1800 | Votes: 9 | Rating: 8 ]
- DIY Yaesu Data Cable
- A homemade data cable for the Yaesu FT-2D made with a a simple USB-RS232 converter with pl2303 chipset
[ Hits: 617 | Votes: 4 | Rating: 4.75 ]
- A Simple Raspberry APRS Position Reporter
- Barest of bones APRS RF position reporter using a Raspberry Pi B+, USB GPS receiver, Baofeng UV-5R, and a mono 3.5mm audio cable between the Pi and the radio
[ Hits: 328 | Votes: 0 | Rating: 0 ]
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