Free books, magazines, collections published in 1998

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Content of books and magazines / Year 1998

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100-watt field UMZCH with a slew rate of 300 V / μs, a bandwidth of 1 Hz.1,3 MHz at a level of 0,1 dB, a harmonic distortion of 0,002% and a signal-to-noise ratio of 100 dB

100 watt amplifier

120-volt power supply in a 220 V network

127 or 220? (use of 127V lamps in 220V network)

16-program automatic lighting effects without PROM

22-element antenna for EME-QSO

3, 4, 5, 6 element YAGI for 6 meters

40o under the sign Pi

4-element antenna for 6m band

50 MHz - a new range in Ukraine

50 useful tips from the American magazine Boy mechanics

55 programs instead of six

5-element BEAM

8 channels in SVP-403+DU

8-channel switch for oscilloscope

8-band graphic equalizer

ALC in the output stage

AM radio station 160 m band

ASIC - Custom Integrated Circuit

CROSS-BAND repeater

CW filter for low-frequency path of KB receiver

Dolby B, Dolby C, Dolby S, dbx?

DSD vs DVD AUDIO

DVD - a new generation of storage media

DX Antenna 2x3/4 Inv.V

EC-DC converters

Funai - plays but does not rewind

GP at 3.5-28 MHz

GPS. Questions and answers

HAM RADIO-97

HB9CV on 21 and 28 MHz

Hi-Fi truth and high-end fairy tales

High-end vinyl corrector with active thermal noise compensation

High-End UMZCH on HEXFET 350 W

II International Astronomy Olympiad

III International Conference in memory of S.N. Bernstein

LM117/LM217/LM317(KP1157ЕН1)

LPT-adapter for testing and controlling ICs with PC bus

LTR, ED ACS and TETRA

LXI Moscow Mathematical Olympiad

NMT, GSM or DAMPS: make the right choice

RC oscillator on a modified Wien bridge

PIC RISC microcontrollers from Microchip Technology

SSB transceiver 160 m band

120 W SSB amplifier for 6 meters

SSB/CW receiver on 160m

S-meter in radio station ALAN-100+

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Latest news of science and technology, new electronics:

Artificial leather for touch emulation 15.04.2024

In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>

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The attractiveness of caring men 14.04.2024

The stereotype that women prefer "bad boys" has long been widespread. However, recent research conducted by British scientists from Monash University offers a new perspective on this issue. They looked at how women responded to men's emotional responsibility and willingness to help others. The study's findings could change our understanding of what makes men attractive to women. A study conducted by scientists from Monash University leads to new findings about men's attractiveness to women. In the experiment, women were shown photographs of men with brief stories about their behavior in various situations, including their reaction to an encounter with a homeless person. Some of the men ignored the homeless man, while others helped him, such as buying him food. A study found that men who showed empathy and kindness were more attractive to women compared to men who showed empathy and kindness. ... >>

Random news from the Archive

Asbestos disposal 14.03.2010

Asbestos, which until relatively recently was widely used in construction, is hazardous to health - its finest fibers, once in the air, can eventually cause a tumor in the lungs. Therefore, all over the world it is necessary to demolish or reconstruct structures that were once built using asbestos. For example, in France, 25-40 million tons of asbestos and asbestos cement will have to go somewhere.

Now there are two ways to neutralize a dangerous mineral: bury it in a landfill or burn it with plasma burners so that the thin fibers fuse into a glassy mass and lose their ability to fly through the air.

Engineers from the Higher School of Chemistry and Technology in Toulouse (France) dissolve asbestos cement in heated hydrochloric acid. The result is a mixture of harmless (and even necessary for some industries) salts of magnesium, calcium, silicon, iron and aluminum and carbon dioxide.

All of this has commercial value. Burial of a ton of asbestos waste costs 330 euros, plasma treatment costs 1500 euros, and neutralization with hydrochloric acid, on the contrary, brings a profit of 1000 euros per ton.

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Consumer Electronics. Selection of articles

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