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HF Propagation


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Friends News - The DXZone.com

The DXZone.com Amateur Radio Internet Guide

Latest articles, reviews and links posted to The DXZone.com, an amateur radio, cb radio, scanning and shortwave radio, reference site

Fldigi 4.1.11 released  View ?

New bugfix release version for Fldigi. The developer's team of the popular multiplatform multimode amateur radio software has recently announced version 4.1.11 of their open source program.
(01/01/1970 @ 01:00)
SP DX Contest 2020  View ?

SP International DX Contest, April 4, 2020 15:00 UTC to April 5, 2020 14:59 UTC
(01/01/1970 @ 01:00)
The Truth about the G5RV Antenna  View ?

The G5RV Antenna and two other improved alternatives to this basic design, the well known ZS6BKW antenna and the W0BTU variant
(01/01/1970 @ 01:00)
Yaesu FTM-300D  View ?

Yaesu FTM-300D new 144/430 MHz Dual Band C4FM Digital/Analog FM Mobile Transceiver GPS C4FM Dual RX WIRESX Node
(01/01/1970 @ 01:00)
CQ WW WPX SSB Contest 2020  View ?

The WPX Contest is based on an award offered by CQ Magazine for working all prefixes. Held on the last weekend of March (SSB), the contest draws thousands of entries from around the world.
(01/01/1970 @ 01:00)
ICOM IC-R20  View ?

IC-R20 by Icom. Wideband Receiver Professional radioreceiver, allow double receiver, from HF to Microwave, digital recorde, DTCS, Memories and 11 hours countinuous reception.
(01/01/1970 @ 01:00)
TYT MD-380 Review by Miklor  View ?

Radio Equipment/VHF-UHF Handhelds/TYT MD-380
DMR Handheld TDMA Tier I and Tier II VHF or UHF product review with information on accessories
(01/01/1970 @ 01:00)
How to register for a DMR ID  View ?

Operating Modes/DMR
Learn how to register for a DMR ID on DMR-MARC and Brandmeister
(01/01/1970 @ 01:00)
TYT MD-380 firmware modification  View ?

Radio Equipment/VHF-UHF Handhelds/TYT MD-380
How to use the hacked firmware on the MD-380. Tools for working with codeplugs and firmware of the Tytera MD380,
(01/01/1970 @ 01:00)
2E0RDJ - Amateur Radio & Weather Station  View ?

Ham Radio/Personal Pages/Europe
2E0RDj Amateur Radio Station in Beachley, Nr Chepstow. IO81QP. Projects, Radio & Weather.
(01/01/1970 @ 01:00)
Making a Quadri Filar Helix antenna  View ?

Antennas/Quadrifilar Helix
A homemade Quadri filar Helix Antenna project with detailed pictures that can inspire and guide you on building your onw QFH antenna sor 137 MHz.
(01/01/1970 @ 01:00)
VHF Baluns: Fact and Fancy  View ?

Our ideas about HF baluns have changed dramatically in recent years. The focus today is very much on suppressing unwanted common-mode RF currents, to reduce both the received noise levels and the risks of causing interference on transmit.

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(01/01/1970 @ 01:00)
137MHz Quadrifilar Antenna  View ?

Antennas/Quadrifilar Helix
This version of the 137MHz quadrifilar antenna for APT reception is an adaptation from Bill Sykes and Bob Cobey Taming the QFH which appeared in the March 1997 RIG magazine. This article contains detailed 3D pictures and models and detailed pictures.

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(01/01/1970 @ 01:00)
NOAA Satellite Reception with QFH Antenna  View ?

Antennas/Quadrifilar Helix
How to receive NOAA weather satellite with a home made QFH Antenna. This project includes some easy and efficient notch filters to suppress noise from FM frequencies
(01/01/1970 @ 01:00)
Helical Antennas -Theory  View ?

Helical antenna or helix antenna is the antenna in which the conducting wire is wound in helical shape and connected to the ground plate with a feeder line. It is the simplest antenna, which provides circularly polarized waves.

... / ...

(01/01/1970 @ 01:00)
Taming the Quadrifilar Helical Antenna  View ?

Antennas/Quadrifilar Helix
The Quadrifilar Helical antenna provides circular polarization and complete hemispherical reception, which is precisely what is needed to receive the polar orbiting weather satellites, and as a 2 meter antenna it will receive horizontal, vertical and clockwise circular polarization.

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(01/01/1970 @ 01:00)

Last import : 08/04/2020 @ 21:01

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