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TYLKO ZAREJESTROWANI I ZALOGOWANI UŻYTKOWNICY WIDZĄ LINKI. DARMOWA REJESTRACJA

DUBUS 1/2019

Technical Articles

Programmable Test Signal Generator for 6m to 9cm - with CW ID generator and option for 3cm by Hans Peter Mayer, DH1VY

The 2-D Radiation Pattern of Parabolic Dish Antennas by Joachim Köppen, DF3GJ

Adjusting the IF frequency to satisfy the mmWave mixing equation: A feature of microwave SDR IF systems, by John Petrich, W7FU

Experiences, operational considerations and results when using a Portable EME Station for working near the Horizon
by Charlie Suckling, G3WDG, and Petra Suckling, G4KGC

Phase locked External Reference for 10 GHz Satellite LNBs by António Matias, CT1FFU

EME on Millimeter Waves: Part 2 - My Antenna by Sergey Zhutyaev, RW3BP

Simple PCB Antenna for 23cm by Hans Peter Mayer, DH1VY

SR T02: New Walkie Talkie module - for the price of a box of cigarettes by Jure Mikeln, S52CQ

A new milestone in the history of amateur radio by Reinhard Kühn, DK5LA

Microwave Spain - 122 GHz: A new step forward for the millimetre bands in Spain by Luis Presa, EA5DOM

DUBUS 2/2019


Technical Articles

Simple dual band dish feed for Es'hail-2 / QO-100 by Mike Willis, G0MJW, Remco den Besten, PA3FYM and Paul Marsh, M0EYT

Cassegrain Reflections - Producing and Testing 3D printed Cassegrain sub-reflectors by Alan Devlin, VK3XPD

76 GHz Transverter Upgrade: Using the New DB6NT MKU 76 G2 Transverter by Al Ward, W5LUA

Sporadic-E Summary 2018 – 144 MHz by Joachim Kraft, DL8HCZ/CT1HZE

Update to Sky and Earth Brightness Temperatures for VHF / UHF Amateur Radio Bands by Hartmut Klüver, DG7YBN

News and Columns
Microwave North America: 78 GHz Fun in the Arizona Sun, by Tony Emanuele, K8ZR
Microwave Japan
VHF South Africa
Microwave Europe
Microwave Spain
Tropo News
EME News
Solar Cycle 24 Report, mAY 2019 - by Jim Kennedy, KH6/K6MIO
6m and 4m News
News & Comments

DUBUS 3/2019


Technical Articles

Differential GPS Azimuth Reference for Microwave Portable Operations by David Smith VK3HZ and Rex Moncur VK7MO

As easy as 1...2...2 GHz? An easier way on to the 122GHz mm-wave band by Andrew Anderson VK3CV / WQ1S

2m Band Transverter for the IC-7300 SDR Transceiver by Michael Kuhne, DB6NT

Motorizing WR-10 & WR-15 Waveguide Switches by Al Ward, W5LUA

On close-spaced, low-Z, parallel Transmission Lines by Roger Harrison VK2ZRH and Andy Sayers VK3ES

Notes from the noise test lab - Part 1 by Dimitry Fedorov UA3AVR

News and Columns
REF/DUBUS EME Contest 2020 Dates
Tropo News
144 MHz Record QSOs from Cape Verde (D41CV)
Microwave Europe
Microwave Spain
Microwave Japan
VHF News VK/ZL
The Australian “EPIC” 2019 Microwave Dxpedition, by VK5KK
Solar Cycle 24 Report, July 2019 - by Jim Kennedy, KH6/K6MIO
6m and 4m News
News & Comments

Chciałbym zwrócić uwagę na artykuł Michaela Kuhne DB6NT znanego konstruktora sprzętu dla UKF-owców.
2m Band Transverter for the IC-7300 SDR Transceiver by Michael Kuhne, DB6NT, strona 50-62 Dubus nr 3/2019.
Autor przedstawia swój projekt małego (gabarytowo) transvertera 28MHz/144MHZ do montażu w środku IC7300.
Transverter zbudowany w oparciu o elementy najnowszej technologii łącznie z IC7300 zapewnia naprawdę czysty sygnał wyjściowy 144MHz, co prawda mocy tylko 2W.
Ma to przede wszystkim służyć jako podstawa do sterowania następnymi transverterami 70cm, 23cm i wyżej 10GHz 24GHz, oczywiście produkcji DB6NT.
DB6NT już sprzedaje płytki tego transvertera do samodzielnego montażu z niektórymi komponentami, TCXO 116MHz.


TYLKO ZAREJESTROWANI I ZALOGOWANI UŻYTKOWNICY WIDZĄ LINKI. DARMOWA REJESTRACJA


Opis samodzielnego montażu, schemat ideowy, opis uruchomienia, spis elementów, uzyskane parametry tylko w Dubusie nr3/2019.

DUBUS 4/19

Technical Articles

23, 13, 9 and 6cm Dish-feed on one feedline by Hans Holsink, PE1CKK

VLNA-144 - Very Low Noise Preamplifier by Dipl. Ing. Gyula Nagy, HA8ET

Twin-boom Yagi Antennas for 432 MHz – Comparing different radiators by Slobodan Bukvic, YU7XL

Yoctenna / YEFA - A novel radiator and directive antenna with interesting feature in bandwidth and patterns
by Lapo Pieri, IK5NAX

An Antenna Analyzer Does Much More by Paul Wade, W1GHZ

Patch Array Antenna for the Es’Hail-2 Satelliteby Mirek Kasal, OK2AQ