Menu English Ukrainian russian Home

Free technical library for hobbyists and professionals Free technical library


ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
Free library / Schemes of radio-electronic and electrical devices

Antenna Triangle at 14/27/28 MHz. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / VHF antennas

Comments on the article Comments on the article

The total length of the triangle is 21.3 meters.

Frequency range: 12.9 - 16.2 and 24.8 - 29.9 MHz.

Antenna Triangle 14/27/28 MHz

The 1:4 transformer is wound on a ferrite ring 300НН - 600НН, the antenna is powered by an RK-50 cable.

It is convenient to use such an antenna with branded transceivers such as FT-840 (or others that do not have a tuner antenna). No adjustments need to be made. The FT-840 delivers 100W to the antenna within the specified areas!

Author: Igor, UA6HJQ; Publication: krasnodar.online.ru/hamradio

See other articles Section VHF antennas.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

A New Way to Control and Manipulate Optical Signals 05.05.2024

The modern world of science and technology is developing rapidly, and every day new methods and technologies appear that open up new prospects for us in various fields. One such innovation is the development by German scientists of a new way to control optical signals, which could lead to significant progress in the field of photonics. Recent research has allowed German scientists to create a tunable waveplate inside a fused silica waveguide. This method, based on the use of a liquid crystal layer, allows one to effectively change the polarization of light passing through a waveguide. This technological breakthrough opens up new prospects for the development of compact and efficient photonic devices capable of processing large volumes of data. The electro-optical control of polarization provided by the new method could provide the basis for a new class of integrated photonic devices. This opens up great opportunities for ... >>

Primium Seneca keyboard 05.05.2024

Keyboards are an integral part of our daily computer work. However, one of the main problems that users face is noise, especially in the case of premium models. But with the new Seneca keyboard from Norbauer & Co, that may change. Seneca is not just a keyboard, it is the result of five years of development work to create the ideal device. Every aspect of this keyboard, from acoustic properties to mechanical characteristics, has been carefully considered and balanced. One of the key features of Seneca is its silent stabilizers, which solve the noise problem common to many keyboards. In addition, the keyboard supports various key widths, making it convenient for any user. Although Seneca is not yet available for purchase, it is scheduled for release in late summer. Norbauer & Co's Seneca represents new standards in keyboard design. Her ... >>

The world's tallest astronomical observatory opened 04.05.2024

Exploring space and its mysteries is a task that attracts the attention of astronomers from all over the world. In the fresh air of the high mountains, far from city light pollution, the stars and planets reveal their secrets with greater clarity. A new page is opening in the history of astronomy with the opening of the world's highest astronomical observatory - the Atacama Observatory of the University of Tokyo. The Atacama Observatory, located at an altitude of 5640 meters above sea level, opens up new opportunities for astronomers in the study of space. This site has become the highest location for a ground-based telescope, providing researchers with a unique tool for studying infrared waves in the Universe. Although the high altitude location provides clearer skies and less interference from the atmosphere, building an observatory on a high mountain poses enormous difficulties and challenges. However, despite the difficulties, the new observatory opens up broad research prospects for astronomers. ... >>

Random news from the Archive

Nike HyperAdapt 1.0 Auto-Lacing Trainers 16.03.2016

Last fall, actor Michael J. Fox received a real auto-lacing shoe from Nike, much like the one his character wore in Back to the Future 2 back in 2015.

At the time, Nike said that this was only the first generation of this technology, the company intends to develop it and conduct tests in various sports, hoping to put the production of such sports shoes on the assembly line in the future.

This week, Nike announced the Nike HyperAdapt 1.0 shoe, equipped with this functionality, which no longer looks out of touch with reality. Project lead Tiffany Beers says that once you're wearing the shoes, you can quickly adjust the tightness with two buttons on the sides.

Of course, the work did not stop there, at the moment the famous shoe designer Tinker Hatfield is working on a version of the sneaker that can adapt to the needs of athletes on the fly, changing the strength of the leg girth.

Nike HyperAdapt 1.0 Auto-Lacing Shoe Available in Three Colorways Later in the Year

The Nike HyperAdapt 1.0 will go on sale around Christmas this year in three colorways. At first, only members of the Nike+ Club will be able to purchase them.

Other interesting news:

▪ The clouds are coming down

▪ Compact device for visualization of brain activity

▪ Video cameras detect crimes

▪ Growth of the consumer robot market

▪ Platform MediaTek LinkIt Smart 7688

News feed of science and technology, new electronics

 

Interesting materials of the Free Technical Library:

▪ section of the site Instructions for use. Article selection

▪ article History of state and law of foreign countries. Crib

▪ article Why did the Van Halen band ask for M&M's in their rider but remove all brown candy? Detailed answer

▪ Article Pecan ordinary. Legends, cultivation, methods of application

▪ article Low-frequency amplifier on the TA8205 chip. Encyclopedia of radio electronics and electrical engineering

▪ article High stability precision resistors PANASONIC. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

Name:


Email (optional):


A comment:




Comments on the article:

Beck, UN7TX
Bravo! More of this information. Very useful. Well done!!! 73 from UN7TX.


All languages ​​of this page

Home page | Library | Articles | Website map | Site Reviews

www.diagram.com.ua

www.diagram.com.ua
2000-2024