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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

New OSCAR-100 Uplink Converter MK2 by DXPatrol  View ?

New Uplink Converter for OSCAR-100 434MHz to 2400MHz Low Cost Up convertor 100mW (or 8W) all mode TX uplink to Satellite
(01/01/1970 @ 01:00)
Top Amateur Radio Websites - Issue 1925  View ?

Folded dipole antennas: terminated vs un-terminated, L.B. Cebik - W4RNL documents by ON5AU, Antenna Mast Guying for Amateur Radio Antennas, 50:450 Ohm (9:1) Balun for vertical antennas, Trapped Dipole Antenna for 20-30-40m, Vertical Antenna for 30 meters band, How setup the antenna tower, MSL - Mechanical Systems Lehmann - Telescopic Masts and Towers, HF SIGNALS, 435 plus 1296MHz ATF54143 Pre-amplifier

... / ...

(01/01/1970 @ 01:00)
(01/01/1970 @ 01:00)
Top Amateur Radio Websites - Issue 1924  View ?

A simplified guide to FT8 DXPedition mode, Caravan Ham Radio Shack, 80 meter Ceramic Resonator VXO CW Transmitter, Saluki Technology Inc., Introduction to NPR New Packet Radio - Presentation, NPR New Packet Radio - IP over 430 MHz, New Paket Radio: Hamnet over 70cm by EA4GPZ, S9A Log Online
(01/01/1970 @ 01:00)
WSJT-X version 2.1.0 released  View ?

The WSJT Development Group is pleased to announce the general availability (GA) release of WSJT-X Version 2.1.0.
(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)
(01/01/1970 @ 01:00)
AllStarLink Community  View ?

Operating Modes/Internet Linking/AllStarLink
The official community website of the AllStarLink amateur radio internet linking system. The communinty requires registration and is the proper place to join discussions for all matters related to AllStar

... / ...

(01/01/1970 @ 01:00)
The Classic Beverage Antenna Revisited  View ?

This is a QST Article published in January 1982 by W1FB D. Demaw and HH Beverage and is a complete review of the original article published in 1922, which updates and reivew the beverage antenna theory and developlment, explaining the antenna design of transformers and gives accurate reports on antenna general performance.

... / ...

(01/01/1970 @ 01:00)
End Fed Antenna with a 1:64 Matching Network  View ?

Antennas/End-Fed/End Fed Half Wave Antenna
In this experiment the autor is going to explore the use of a 1:64 matching network on the End Fed Long Wire Antenna. Experiment will consist in build a 80-40-20-15-10 meter End Fed Long Wire Antenna with a 1:64 matching network from the documentation available on the internet

... / ...

(01/01/1970 @ 01:00)
FT CALC 1.3 - Ferrite Toroidal Core HF Calculator  View ?

Software/Circuit Design
This EXCEL Program Worksheet calculates the safe operating conditons for a toroidal transformer operating between 1 and 50 MHz. Manufacturer data for complex permeability, magnetic dimensions, and saturation flux density must be available. Some core types which are commonly used in amateur transmission are included. The program produces limiting winding voltages for linear operation and temperature rise over the range of frequencies and power specified.

... / ...

(01/01/1970 @ 01:00)
Vanity Call Sign History  View ?

DX Resources/Callsigns/Vanity Call Signs
A document partially scripted by Wikipedia and washington readout about history of vanity call signs,
(01/01/1970 @ 01:00)
Fighting Antenna Corrosion - Antenna Maintenance  View ?

Antennas/Repair and Maintenance
How to make proper maintenance of your antenna. Fighting Antenna Corrosion is a QST article published in 1993 that helps on antenna maintenance works
(01/01/1970 @ 01:00)
How to Find Old Amateur Radio Call Signs  View ?

DX Resources/Callsigns
Many times, persons doing research about their ancestors know that a relative was a ham radio operator, and they are interested in learning the call sign held by that person. Depending on the year when the person was licensed, this can sometimes be a very difficult process.

... / ...

(01/01/1970 @ 01:00)
The Easy Way Antenna Systems  View ?

Antennas/Theory/Antenna Gain
This document is a must read for anyone considering building a good low cost HF multi-band antenna system. The author combine in this document four important ingredients to produce simple but effective antenna system, like antennas of non resonant length, line attenuation, the transmatch and the balun

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(01/01/1970 @ 01:00)
About The Beverage Antennas - Receiving Antennas  View ?

An article about the Beverage antennas, super long wire receiving antennas thar are unidirectional and have a very low noise that makes this antenna excellent for low band dxing. By Thomas R. Sundstrom W2XQ, 73, June 1981, 73 Magazine

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(01/01/1970 @ 01:00)

Last import : 25/08/2019 @ 09:03

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