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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

NanoVNA-H4 Vector Network Analyzer  View ?

NanoVNA-H4 Vector Network Analyzer - 10KHz-1.5GHz HF VHF UHF Antenna Analyzer with 4-inch LCD touchscreen,portable with 1950mAh battery
(01/01/1970 @ 01:00)
Top Amateur Radio Websites - Issue 2113  View ?

High Performance common-mode chokes, A Practical, 5-Band Homebrew Wire Beam , Morse Code Course by UBA, What is a HAM Mesh Network, Online dBm to watts conversion, Free Virtual Serial Port, mW to dBm Calculator,
(01/01/1970 @ 01:00)
Top Amateur Radio Websites - Issue 2112  View ?

160m Band Loaded Inverted L Antenna, How to evaluate Choke performance, Two elements Triband Yagi Antenna, HW VSP3 - Virtual Serial Port, Ham Goodies, Virtual COM
(01/01/1970 @ 01:00)

HF Manual Antenna Tuner 1.8-30 MHz, Legal Power
(01/01/1970 @ 01:00)
Top Amateur Radio Websites - Issue 2111  View ?

OM0ET Antennas, BalUn for Delta-loop & Quad-loop antennas, Gimme Five - QRP SSB Transceiver, Single element Delta Loop Antenna, GridTracker, com0com Null-modem emulator , Analyze Contest Passing
(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)
Home Built 6M J-Pole Antenna  View ?

Antennas/6M/6 meter J-Pole Antenna
This article provides details on building a 6 Meter J-Pole antenna using PVC pipe for an enclosure.
(01/01/1970 @ 01:00)
HF communication prediction tools  View ?

Propagation/Propagation Forecast
Online HF Communication prediction system provided by the Australian Governament Buerau of Metereology allow to predict usable frequency rage for radiocommunications between two stations allowing to specify frequency and date range. This tool allow calculation with different methods and algorithms

... / ...

(01/01/1970 @ 01:00)
Sunspot Index Since 1750  View ?

The yearly, black, up to 1750, and monthly red, from 1750 up to now, sunspot numbers provided by the Royal Observatory of Belgium SILSO
(01/01/1970 @ 01:00)
Calculation of the Maximum Usable Frequency  View ?

Propagation/MUF Indicators
This paper presents the method of calculating the maximum usable frequency (MUF) and field strength of radio waves reflecting 2 times at the F2 ionosphere layer under inhomogeneous conditions of the ionosphere. The comparison between predicted and measured MUF has shown that the proposed method significantly increases the accuracy of calculation MUF.

... / ...

(01/01/1970 @ 01:00)
Build your own Windom Antenna  View ?

Building a Windom HF Antenna. A PDF file presentation about homebrewing a windom antenna for the HF bands with formulas for 40 and 80 meters bands and step by step guide on making a 4:1 balun to feed the antenna.
(01/01/1970 @ 01:00)
WebSDR Wismar  View ?

Internet and Radio/WebSDR
This WebSDR is located in Wismar in the north of Germany JO53RV and operated by Frank Goehling DO7AX
(01/01/1970 @ 01:00)
DARC Contest Calendar  View ?

DX Resources/Contest Calendars
Yearly contest calendar compiled and manteined BY DARC with weekly and montly HF Contest calendar
(01/01/1970 @ 01:00)
Moxon Beam for 2m  View ?

A home made, dirty and quick moxon antenna for 144 MHz made with PVC pipes.
(01/01/1970 @ 01:00)
VSPE - Free Serial Port  View ?

Software/Virtual Serial Port
Virtual Serial Ports Emulator for Windows. Virtual Serial Ports Emulator tool (and VSPE API) is free on 32 bit platform and can be used with no charge for any purpose. No registration or activation key is required.

... / ...

(01/01/1970 @ 01:00)
Simple J-Pole for the 2m band  View ?

A very essential j-pole antenna for 144 MHz. To adjust the SWR you will have to play with the 40mm distance between the coax feed and the braid inner conductor connection
(01/01/1970 @ 01:00)

Last import : 15/04/2021 @ 11:46

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