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Magazine HF and VHF

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Alphabetical list articles with annotations, from journals published in 2002 in the journal KV and VHF:

DDS: Not all that glitters is gold

RTTY-BBS - electronic bulletin board

SSB mini transceiver

WSJT, or Working Through Meteors

WSJT, or Working Through Meteors

WSJT, or Working Through Meteors

Antenna rotator

Radio control unit R-143

Everything (or almost) everything about Windom

All-band HF antenna VMA-10 NP

All-band HF antenna VMA-10 NP

All-band HF antenna VMA-10 NP

All-band HF antenna VMA-10NP

World Amateur Radio Network

World Amateur Radio Network

VPA for RA3AO transceiver

VPA for RA3AO transceiver

Double balanced mixer on a chip type K (R) 590KN8

Bidirectional Beverage Antenna

Refinement of the R-326M radio receiver

Refinement of the R-326M radio receiver

Refinement of the R-326M radio receiver

VHF transverter output power indicator

Karaoke in BASIC

Quasi-touch switch

Quartz overtone loopless oscillator

HF synthesizer

HF synthesizer

HF transceiver Druzhba-M

HF transceiver Druzhba-M

HF transceiver Druzhba-M

HF power amplifier from CB-747

HF Amplifier Retro

Len - at the 29th World Cup

Ladder crystal filters in an amateur HF transceiver

Ladder crystal filters in an amateur HF transceiver

Ladder crystal filters in an amateur HF transceiver

Ladder crystal filters in an amateur HF transceiver

Ladder crystal filters in an amateur HF transceiver

Wacky Antennas

Small VHF Antennas

Multiband Antenna Propeller

Mobile HF anti-aircraft antennas

UA1FA Transceiver Upgrade

Modification YAESU FT840

Bridge measurement methods

Bridge measurement methods

15 m directional antennas

LF compressor

[1] [2]

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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 ... >>

Petgugu Global cat litter 15.04.2024

Taking care of pets can often be a challenge, especially when it comes to keeping your home clean. A new interesting solution from the Petgugu Global startup has been presented, which will make life easier for cat owners and help them keep their home perfectly clean and tidy. Startup Petgugu Global has unveiled a unique cat toilet that can automatically flush feces, keeping your home clean and fresh. This innovative device is equipped with various smart sensors that monitor your pet's toilet activity and activate to automatically clean after use. The device connects to the sewer system and ensures efficient waste removal without the need for intervention from the owner. Additionally, the toilet has a large flushable storage capacity, making it ideal for multi-cat households. The Petgugu cat litter bowl is designed for use with water-soluble litters and offers a range of additional ... >>

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

Drinking alcohol makes you feel hungry 18.01.2017

Scientists from the Francis Crick Institute (UK) found that a person can eat more when intoxicated, not because of a decrease in self-control, but because alcohol triggers brain signals about the need to eat. The corresponding mechanism has been shown in experiments on mice, but researchers believe that there is a similar mechanism in humans.

Experimental mice were fed alcohol for three days at a dose approximately equivalent to one and a half bottles of wine for a person. It turned out that alcohol caused an increase in activity in neurons called AGRP - these cells are responsible for the feeling of hunger. In fact, the mice also ate more than they normally would.

In a second experiment, the scientists blocked the work of AGRP neurons with drugs, and alcohol did not produce the previously observed effect, which proves their role in the designated process.

Thus, not only does alcohol itself contain a lot of calories, its use also contributes to overeating, and often it is not about the healthiest food, but as a result, problems with being overweight.

News feed of science and technology, new electronics

 

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