Restoration of the UN9 / 27-1,3 A multiplier. Scheme, description

Free technical library

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

Recovery of the UN9 / 27-1,3 multiplier A. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Телевидение

Comments on the article

Restoration lends itself to those multipliers in which the first diode (connected to terminal F) is faulty. To restore, first of all, you need to carefully drill out the faulty diode.

This is done as follows: with a drill with a diameter of 6 ... 7 mm, stepping back from the edge of the multiplier 7 mm, from the side opposite to the inscriptions, three holes are drilled to a depth of approximately 12 mm, as shown in the figure. When drilling, you need to periodically remove the drill from the hole and monitor the appearance of copper, or, if the diode is burned out, the burnt part of the diode.

Restoration of the UN9 / 27-1,3 A multiplier

Then you should drill a few more millimeters further to drill out the remnants of the burnt diode. After that, the holes are filled with epoxy, BF glue or nail polish. After the glue or resin has dried, a KTs106G diode or a 5GE200AF selenium column (anode to the "-" terminal) is soldered to the "-" and "+ F" terminals from the outside, and the multiplier is installed in the TV.

In this way, I restored about ten UN9/27-1,3 multipliers, which have been operating for more than three years.

Author: A. Parfinovich (EU1DD), Minsk; Publication: N. Bolshakov, rf.atnn.ru

See other articles Section Телевидение.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Alcohol content of warm beer 07.05.2024

Beer, as one of the most common alcoholic drinks, has its own unique taste, which can change depending on the temperature of consumption. A new study by an international team of scientists has found that beer temperature has a significant impact on the perception of alcoholic taste. The study, led by materials scientist Lei Jiang, found that at different temperatures, ethanol and water molecules form different types of clusters, which affects the perception of alcoholic taste. At low temperatures, more pyramid-like clusters form, which reduces the pungency of the "ethanol" taste and makes the drink taste less alcoholic. On the contrary, as the temperature increases, the clusters become more chain-like, resulting in a more pronounced alcoholic taste. This explains why the taste of some alcoholic drinks, such as baijiu, can change depending on temperature. The data obtained opens up new prospects for beverage manufacturers, ... >>

Major risk factor for gambling addiction 07.05.2024

Computer games are becoming an increasingly popular form of entertainment among teenagers, but the associated risk of gaming addiction remains a significant problem. American scientists conducted a study to determine the main factors contributing to this addiction and offer recommendations for its prevention. Over the course of six years, 385 teenagers were followed to find out what factors may predispose them to gambling addiction. The results showed that 90% of study participants were not at risk of addiction, while 10% became gambling addicts. It turned out that the key factor in the onset of gambling addiction is a low level of prosocial behavior. Teenagers with a low level of prosocial behavior do not show interest in the help and support of others, which can lead to a loss of contact with the real world and a deepening dependence on virtual reality offered by computer games. Based on these results, scientists ... >>

Traffic noise delays the growth of chicks 06.05.2024

The sounds that surround us in modern cities are becoming increasingly piercing. However, few people think about how this noise affects the animal world, especially such delicate creatures as chicks that have not yet hatched from their eggs. Recent research is shedding light on this issue, indicating serious consequences for their development and survival. Scientists have found that exposure of zebra diamondback chicks to traffic noise can cause serious disruption to their development. Experiments have shown that noise pollution can significantly delay their hatching, and those chicks that do emerge face a number of health-promoting problems. The researchers also found that the negative effects of noise pollution extend into the adult birds. Reduced chances of reproduction and decreased fertility indicate the long-term effects that traffic noise has on wildlife. The study results highlight the need ... >>

Random news from the Archive

Technique against pirates 18.12.2000

You are mistaken if you think that the pirates remained somewhere in the seventeenth century. In the waters of Southeast Asia, pirate attacks on cargo ships are now quite common. Over the past four years, the number of attacks on Japanese merchant ships has increased fivefold. And all over the world in 1999 there were more than three hundred cases of piracy. It got to the point that the team of the Japanese icebreaker "Sirase", which set off for Antarctica last fall, when passing through the most "pirate-dangerous" zones off the coast of Indonesia, tightly battened down and tied all the doors from the inside with ropes, and water cannons were placed on the deck to wash away those climbing on board of pirates.

The methods of the pirates have remained the same: the ship is boarded by throwing hooks with ropes or rope ladders on board.

In July of this year, 15 Japanese bulk carriers were equipped with a simple protection system. A wire connected to a tension sensor was stretched along the deck railing. When the hook breaks or pulls on the wire, an alarm sounds and powerful spotlights are turned on. But ships are equipped with more sophisticated anti-piracy devices.

An attack is automatically notified by satellite to the Coast Guard and the shipowner, one of which is about the size of a shoe box, and no one on the ship knows where the box is hidden so the pirates can't turn it off.

Other interesting news:

▪ hangover cure

▪ New material accumulates and stores solar energy for decades

▪ Super clear display

▪ Low Noise LDO LDLN030

▪ Home doctor in the closet

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Interesting facts. Selection of articles

▪ article Sky in diamonds. Popular expression

▪ article What mountain would be considered the highest on Earth if the height was measured not from the level of the ocean, but from the foot of the mountain? Detailed answer

▪ article Water plantain. Legends, cultivation, methods of application

▪ article Subwoofer from improvised materials. Encyclopedia of radio electronics and electrical engineering

▪ article Telegraph key on the PIC-controller. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

All languages of this page

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