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Stories from the life of a radio amateur. True cautionary tales told from 2002 to 2024 by site readers www.diagram.com.ua

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A random story from the life of a radio amateur:

I became a radio amateur in 1956-57. One of my fellow students had a brother who was a famous radio amateur. He worked in KB-1 and had the opportunity to get the most scarce parts. A fellow student was one of the first to make direct-amplification transistor radios based on P5, P13 transistors, and then P401 appeared. He used lacquered Palekh caskets as cases. The speaker was made from a DEMS capsule - a terrible shortage, not to mention a ferrite rod for the antenna. And so my friend once brought such a receiver to school. When I heard that this box was playing music and talking, I almost went crazy (we didn’t have a radio, TV, or even radio broadcast at home). He immediately stuck to him so that he would somehow teach me how to do such a thing (he saw how his brother does it and, although he himself was not a radio amateur, he mastered everything well). A friend said that it was necessary to steal details and a diagram from his brother (I didn’t know what it was) and get a soldering iron. He will show me how the parts should be connected according to this scheme, but for me to prepare my collection of match labels in exchange. Then I heard the word "pinhole". Under the guidance of a friend, I learned how to somehow wind a transformer on a ferrite ring and assembled this receiver model on the surface of a shoe box as a breadboard. The most interesting thing is that I made a mistake with the pinout, and turned on one of the transistors in the inverse mode, but this thing worked, although it was very quiet (it was audible for a meter). Since then, my entire subsequent life has been connected with electronics - I became an engineer-designer-technologist of radio equipment (there was such a specialty). True, I no longer consider myself a radio amateur for twenty years, but for more than thirty years I have been one, making tube HI-FI, speakers, tape recorders and players. In the 60s, in the 70s, microcircuits and their various amateur radio applications began. In the 80s, microprocessors 8080. The last thing I did as an amateur was computers like Sinclair, RK, and my own design - "Ocean". Here is such a curriculum vitae.
Other stories from the life of radio amateurs | Random fun story

Random fun puzzle:

A man went to sea and got into a storm. He was taken to an island where there were no men, and only girls lived. In the morning he woke up covered in ropes at some kind of ritual and found out that they wanted to kill him. And he asked for the last word. After he said it, the girls made him a boat, gave him food, water and sent him home. What did he say?


Other fun puzzles | Random fun puzzle

Random Question Quiz Online:

In the summer of 1976, on the roads of Texas, you could see a black BMW with its windows tightly closed. Answer in two words what the people who drove around in this car were doing.


Other Quiz Questions | Random five questions

Random aphorism:

"Самая большая экономия, которая возможна в области мысли, - согласиться, что мир непознаваем, - и заняться человеком" (Альбер Камю)
Other aphorisms | Random aphorism

Random proverb:

Не будь слишком сладким, а то съедят. Афганская пословица
Other proverbs of the peoples of the world | Random proverb

Random phraseological unit:

The revolution has a beginning - the revolution has no end
(About a long, protracted process, action (jokingly ironic))
From the song "The Revolution Has a Beginning..." (1967), written by the composer Vano Muradeli to the verses of the poet Yuri Semyonovich Kamenetsky (b. 1924).
Other phraseological units | Random phraseological unit

Random phrase in Latin:

Quod erat demonstrandum. - Which is what needed to be proven.
Other phrases in Latin | Random phrase in Latin

Random fact "Did you know?":

During the atomic bombings of Hiroshima and Nagasaki, 280 Japanese were exposed to radiation. Of these, 45% are still alive.
Other Facts "Did You Know?" | Random interesting fact

Random article of the Great Encyclopedia for Children and Adults:

How long have pets been around?

This can only be judged by the results of archaeological excavations. Today it is believed that the dog was domesticated in the Mesolithic era, the pig, sheep, goat, cattle - in the Neolithic era and later - the horse. Cats began living near humans probably around 7000 years ago in the Middle East, but they were not truly domesticated until 4000 years ago.
Other articles of the Great Encyclopedia | Random article of the Great Encyclopedia

 


 

Latest news of science and technology, new electronics:

The speech of sperm whales is similar to that of humans 18.05.2024

In the world of the ocean, where the mysterious and unknown coexists with the studied, sperm whales, with their huge brains, are of particular interest to science. Researchers, working with a huge array of audio recordings collected during the Dominica Sperm Whale Project (DSWP) - more than 8000 recordings, seek to unravel the secrets of their communication and understand the structure and complexity of the language of these mysterious creatures. By studying in detail the recordings of 60 sperm whales in the eastern Caribbean, scientists have revealed surprising features of their communication, revealing the complexity of their language. "Our observations indicate that these whales have a highly developed combinatorial communication system, including rubato and ornaments, which indicates their ability to quickly adapt and vary during communication. Despite significant differences in evolution, sperm whales have elements in their communication that are characteristic of human communication," says Shane Gero, a biologist at Carleton University and director of the CETI project. Issl ... >>

Electron spin for quantum information transfer 18.05.2024

The transfer of quantum information remains one of the key tasks of modern science. Recent advances in the use of electron spin to expand the capabilities of information transfer in quantum systems have become very important. Researchers at Lawrence Berkeley National Laboratory are pushing the frontiers of quantum information science by experimenting with the possibilities of electron spin. Electron spin, a natural quantum bit, is a potentially powerful means for storing and transmitting information in quantum systems. Magnon wave packets, collective excitations of electron spin, have revealed their potential to transmit quantum information over significant distances. The work of Berkeley Lab researchers has revolutionized the way such excitations propagate in antiferromagnets, opening up new prospects for quantum technologies. Using pairs of laser pulses, scientists disrupted antiferromagnetic order in one place and simultaneously studied it in another, creating ... >>

Sound-absorbing silk 17.05.2024

In a world where noise is becoming increasingly intrusive, the emergence of innovative materials that can reduce its impact is of great interest. MIT researchers have unveiled a new sound-absorbing silk fabric that promises to revolutionize quiet spaces. The Massachusetts Institute of Technology (MIT) has made significant breakthroughs in the field of sound absorption. Researchers have developed a special silk fabric that can effectively absorb sound and create cozy, quiet environments. The fabric, thinner than a human hair, contains a unique vibrating fiber that is activated when voltage is applied to it. This feature allows the fabric to be used to suppress sound waves in two different ways. The first method uses fabric vibrations to generate sound waves that cover and cancel out unwanted noise, similar to noise-canceling headphones. This p ... >>

Random news from the Archive

Saving apples from sunburn 10.08.2021

Washington State University researchers are testing a high-tech approach to preventing apple scorch in the face of global warming.

The summer sun helps the apples ripen and get their classic red color, but the heat often causes the fruit to scorch. While the leaves of the apple tree are able to absorb sunlight, the fruit also does not dissipate heat. Sunburn occurs in as little as 10 minutes, causing irregularities that detract from the quality and appearance of fruit, such as ugly brown spots.

Most apple growers in the US use sprinklers to cool the canopy of orchards on hot days. But trees absorb this extra water and use it to grow shoots and leaves at the expense of fruits.

As part of a project jointly funded by the USDA's National Institute of Food and Agriculture and the National Science Foundation, Hoth's team is developing a horticultural sensor system. The technology must detect the surface temperature of the fruit and fine-tune the supply of cold water for evaporative cooling.

Using infrared cameras and miniature weather stations, the prototype activates the top sprinklers exactly when they are needed, minimizing the negative effects of spray cooling. As an added benefit, the scientists have also developed a smartphone app that uses data from a nearby weather station as well as a low-cost thermal/RGB camera to measure fruit temperature and heat stress hazards.

Khot systems can send real-time data to growers to help them make decisions about managing heat stress and, in the future, storing and marketing their fruit, as sun-burnt apples go bad quickly in storage.

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News feed of science and technology, new electronics

 

Interesting materials of the Free Technical Library:

▪ section of the site Videotechnique. Article selection

▪ article Color marking of imported capacitors. Directory

▪ article What is smoke? Detailed answer

▪ article If the child choked. Health care

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▪ article Stay with the nose. Focus Secret


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