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

Isotron antenna for 14-30MHz band. 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

 Antenna "Isotron" for the range 14-30 MHzAntenna "Isotron" for the range 14-30 MHz

Model #10 with straight wire, model #20 with bent wire

Antenna "Isotron" for bands 14-30 MHz

Table 1

Model # 10 11 12
Height, Width, Depth: mm 406x292x102 406x292x102 533x292x102
Range Width: 1Mhz* 1Mhz* 450khz*
Coaxial cable: 50-75 ohms 50-75 ohms 50-75 ohms
Frequency: 28-30 MHz 40 CB channels Whole Range
Input power: 1000 PEP** 1000 PEP** 1000 PEP**

Antenna "Isotron" for the range 14-30 MHz

Model #20 with bent wire

Antenna "Isotron" for bands 14-30 MHz

Table 2

Model # 15 17 20
Height, Width, Depth: mm 533x292x102 533x292x102 533x203x102
Range Width: 450khz* 450khz* 350khz*
Coaxial cable: 50-75 ohms 50-75 ohms 50-75 ohms
Frequency: Whole Range Whole Range Whole Range
Input power: 1000 PEP** 1000 PEP** 1000 PEP**

Antenna "Isotron" for the range of 14-30 MHz. Antenna design
Antenna design sketch

Antenna "Isotron" 80/40 COMBO

Publication: N. Bolshakov, rf.atnn.ru

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

Computer reads minds in real time 13.02.2016

Scientists from the University of Washington (USA) have learned to read minds with amazing speed and accuracy thanks to brain implants and sophisticated software.

To learn how to decode human brain signals at near-perceptual speed, the researchers turned to seven epilepsy patients at a local hospital for help.

Patients have been given temporary brain implants that help doctors study the mechanism of epileptic seizures. During the experiment, they were shown a random sequence of pictures: human faces, houses, and a blank gray screen for 400 milliseconds. The task of the patients was to notice the image of the house turned upside down.

The electrodes in their brains were connected to neural network-based software that tracked two different types of brain signals, namely coupled event potentials (when large groups of neurons respond simultaneously to an image being shown) and broadband spectral changes (signals that occur after viewing an image). ).

The computer processed the brain signals 1000 times per second, which made it possible to determine which combination of electrodes and signals was best suited to decode the patients' thoughts.

After training the software, the scientists showed the patients a completely new set of pictures. The computer was now able to predict with 96% accuracy what the patient was seeing - a house, a face, or a gray screen. And guessed it almost at the speed of thought!

The researchers explain that they were able to achieve such results due to the fact that neural networks are able to capture different and complementary aspects of subjective perception.

Other interesting news:

▪ Improved efficiency of flexible CIGS solar cell

▪ Smartphone with e-ink color screen

▪ Medicines from the tap

▪ Refrigerator for quantum chips

▪ FAST radio telescope will search for exoplanets with a magnetic field

News feed of science and technology, new electronics

 

Interesting materials of the Free Technical Library:

▪ section of the site The most important scientific discoveries. Article selection

▪ article Abyssinian well. Tips for the home master

▪ article How Emperor Nero averted the troubles foreshadowed by the comet? Detailed answer

▪ article Doctor on duty (paramedic) of the first-aid post. Job description

▪ article Automotive VHF FM tuner. Encyclopedia of radio electronics and electrical engineering

▪ article Experiments with the outer part of the flame. physical experiment

Leave your comment on this article:

Name:


Email (optional):


A comment:





All languages ​​of this page

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

www.diagram.com.ua

www.diagram.com.ua
2000-2024