cal city ca
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Antennas : 2M- Budget-Friendly 5-Element Quad Antenna Design
- Constructing a 5-element quad antenna, the author aimed for low cost and simplicity, resulting in an effective design with 11 dBi gain and SWR of 2:1 or better across the 2-meter band. Using wood and dowels, the antenna costs under $8 and takes less than two hours to build with basic tools.
The model predicts excellent performance, confirmed by ARRL Lab measurements. Practical field results demonstrate improved communication, even in simplex mode.
[ Hits: 118 | Votes: 1 | Rating: 7 ]
- Vertical bazooka antenna for the 40m
- A quarter wave vertical omni-directional antenna for 7 MHz. Formulas for dimensions in feet and meters are provided. Ideal radial angle is between 35° and 45°. Velocity factor (Vf) varies based on coax type.
[ Hits: 135 | Votes: 7 | Rating: 6.85 ]
- Calculate Antenna Lenght in feet, inches and meters
- Inches and meters Javascript Wavelength Calculator allow to input a frequency in MHz and calculate wavelenght in several units considering also fractions of wavelenght and the velocity factor. Includes an usefull inch to meter converter
[ Hits: 502 | Votes: 3 | Rating: 4.67 ]
- Build a Simple VHF Dipole Antenna for 2 Meters: A Beginner's Guide
- This article serves as a beginner-friendly guide to constructing a simple VHF dipole antenna for 2 meters, perfect for novices in the hobby. With an emphasis on affordability and simplicity, it explains the basics without overwhelming technical details. Recommendations for coaxial cable and mounting methods are provided, offering practical solutions for effective communication. By following these instructions, novices can build a functional antenna without breaking the bank.
[ Hits: 113 | Votes: 1 | Rating: 7 ]
- Cherkasy City Radio Club
- UR4CWA is the call of the ham radio club radio station of the Cherkasy City Radio Club in Ukraine
[ Hits: 49 | Votes: 0 | Rating: 0 ]
- W0CW Kansas City DX Club
- Established in the mid 1970's The Kansas City DX Club is an ARRL-affiliated amateur radio club open to anyone interested in DX or contesting. Our club callsign is W0CW. Many of our club members are from the Kansas City metropolitan area, on both sides of the Missouri/Kansas state line, but our roster also includes members from all over the United States.
[ Hits: 54 | Votes: 0 | Rating: 0 ]
- Interactive World Clock
- Three local city times around the world displayed simultaneously.
[ Hits: 202 | Votes: 1 | Rating: 10 ]
- Yaesu FT-817 Audio Enhancement: Heathkit-inspired Homebrew Project
- Inspired by Heathkit, author aimed to enhance his Yaesu FT-817 with audio and RF processing. Design goals included a compact enclosure, PCB simplicity, matching jacks, a visual meter, and a built-in signal generator. Despite challenges in finding a suitable compressor IC for a 5V DC mic jack, he chose the Analog Devices SSM2165/2166 series. Prototyping with a solderless breadboard, author planned a PCB layout for its versatile performance in communication use.
[ Hits: 80 | Votes: 1 | Rating: 2 ]
- Arduino Digital Transceiver Project
- Arduino Digital Transceiver (ADX) is a low-cost HF transceiver for digital modes. This Arduino-based project, inspired by QDX, features four bands, including 80m and 20m, supporting FT8, FT4, JS8call, and WSPR. Designed for simplicity and affordability, it uses an Arduino Nano, SI5351 module, and CD2003GP receiver. The ADX project emphasizes easy procurement, construction, setup, and operation, making it an accessible option for QRP enthusiasts. The firmware update enhances functionality, including CAT control support.
[ Hits: 94 | Votes: 0 | Rating: 0 ]
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