HF and VHF Journal Articles, 2006 at the Free Technical Library

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Alphabetical list articles with annotations, from journals published in 2006 in the journal KV and VHF:

CW transceiver on 80m

QRP CW transceiver Aquarius

Roofing filter in a modern transceiver

Software Defined Radio

Active reflector power supply

Windom antenna for 160 m band

Antennas of vertical polarization EW8AU

Antennas with active power supply of vibrators

Antennas with switchable radiation pattern

Transformerless tube power amplifier

Forced Cooled Lamp Block for Power Amplifier

Transceiver power supply for TCA-270-1 transformer

Vertical VHF antennas: myths and reality

VFO for 8,865 MHz IF transceiver

Push-Pull Power Amplifier

Output transistor protection

Power amplifier linearity measurement

How a transceiver became a transceiver

What should be the power amplifier of an amateur HF radio station

HF antenna DL2JTE & HA7HN

Quartz local oscillator

Control controller for Len-160

LF tube transmitter

SSB-CW transceiver small signal path

Low noise GaAs transistors GD-4, GD-9, GD-16, GD-18, GD-22, GD-26

Method for calculating the PA on a lamp with quadratic characteristics

Multi-band antenna W5DXP

Multiband directional antenna

Multifunctional electronic key and transceiver electronic scale with sound and digital indication

Modernization of the radio receiver Katran

Maybe more!

Powerful broadband GaAs FETs GF-7, GF-21, GF-50, GD-10 and GF-17

tilted dipole

On-window VHF antenna

One-button switch for receiver attenuators

Passive or active?

Transmitting short loop antennas

The transmission path of the transceiver

Restructuring of Len-160 radio stations for operation in the range of 144 ... 146 MHz

U-shaped antenna elements of a new form and antennas from them

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Random news from the Archive

Clay XNUMXD Printing 27.05.2009

American materials scientists managed to make XNUMXD printing cheaper.

Three-dimensional printing, that is, the production of three-dimensional objects from a computer model using a special printer, is a very interesting technology. Today it is used not only for designing machine parts or making individual prostheses: sculptors and museum workers have also begun to be interested in the possibility of creating small editions of works of art.

As a result, there are more and more students who come to learn how to work with such equipment. This means that the need for consumables is increasing, and they are expensive.

“We are now spending up to $4000 a quarter to buy branded clay for such a printer. This is too much for our budget. In fifteen years of operation, we have spent so much money on consumables that the initial cost of a printer - $ 20 - seems now just ridiculous " says Mark Gunter of the University of Washington.

To keep costs down, he and his colleagues created clay-based compositions for artists. Store-bought sugar and maltodextrin were added to it. As a result, the cost of consumables has decreased by fifty times, and working with them is no worse than with branded ones.

Well, if the printer still breaks down, scientists will repair it with their own hands - the guarantee will be lost. But cheap material is indispensable for teaching students.

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