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Magazine HF and VHF

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Alphabetical list articles with annotations, from journals published in 2005 in the journal KV and VHF:

15 V / 40 A - cheap and cheerful

4-band bass equalizer

Ground Plane, combined with a television antenna

145 MHz RFD Antenna

Automatic P-loop tuning

Auto Bias in Power Amplifier

Automatic Antenna Rotation Control

Fuchs Antenna - Familiar Stranger

160m Antennas

160m Antennas

Balance detector YES - 2002

Your R-130

Your R-130

Vertical antenna F6GOG

Highly dynamic transceiver IF/AF modem with crystal filter

Highly dynamic transceiver IF/AF modem with crystal filter

Highly dynamic transceiver IF/AF modem with crystal filter

Highly dynamic transceiver IF/AF modem with crystal filter

High Efficiency Hybrid Mixer

High performance low pass filter for 1,8.54 MHz band

High performance low pass filter for 1,8.54 MHz band

Frequency generators and multipliers for VHF equipment

Frequency generators and multipliers for VHF equipment

Frequency generators and multipliers for VHF equipment

Frequency generators and multipliers for VHF equipment

Frequency generators and multipliers for VHF equipment

New Type Hybrid HF Power Amplifier

GPA HF transceiver

GPA HF transceiver

GPA with a non-binary frequency divider

GPA mixing type

S-meter graduation

GUN - GPD

Diplexer

Diplexer

Refinement of the R-130M radio station

Refinement of the R-130M radio station

Antenna grounding

Replacement of transmission line segments with equivalent quadripoles

Relay Notes

Ideal Mixer for Direct Conversion Receiver

Frequency response meter - attachment to the oscilloscope

Frequency response meter - attachment to the oscilloscope

501 kHz CW crystal oscillator

HF power amplifiers on the GU-43B lamp

HF power amplifiers on the GU-43B lamp

Weekend designs: HF loop antenna and absorbing SWR indicator

HF/VHF Beacon Controller

Tube Power Amplifiers

[1] [2] [3]

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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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Random news from the Archive

Mars and its volcanic past 01.07.2018

Everyone knows that Mars has the largest volcano in the known limits of the solar system - named after Olympus, this volcano, as it turned out, also contains the largest amount of volcanic deposits. However, this assumption remains so for the time being, however, some found and proven facts about the geography of Mars clearly indicate the realism of such a result. Experts have previously discovered the so-called Medusae Fossae rock formation, whose origin has so far remained the subject of much controversy for scientists - which today has been partially resolved in favor of the theory of the consequences of a volcanic eruption.

This is a fairly popular and most likely hypothesis about the origin of this rock formation within the equator of Mars - it covers approximately 2 million square kilometers and was first discovered back in 1963. Using combined imagery and radiographic evidence from different spacecraft near Mars, scientists have advanced the strong belief that the formation is predominantly composed of so-called soft rock, formed from 2/3 of the Martian surface and ice.

It is the discovery of ice there that indicates that this rocky ridge - like most of the territory of Mars - was the result of a massive and destructive volcanic eruption that occurred, according to preliminary estimates of experts, about 2 billion years ago. In addition, experts add that winds also mixed in here.

Thus, the previous theory that most of the surface of Mars was formed in this way due to a massive volcanic eruption seems to be confirmed by recent finds of a rocky ridge. It is also worth noting that scientists are still working on the ability to establish how accurate they are in their calculations regarding the layering of a rock formation - because a more detailed interpretation of its state will theoretically significantly enrich the understanding of the formation of planets and stars.

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