DXZone.com

Multi-band End-Fed Antenna

Antennas/End-Fed
An excellent guide to homebrewing multi band end-fed antennas. The article, embed several drawings including diagrams and detailed pictures, illustrating the basic funcionality of end-fed antennas. The author gives some basic hints on how to build a half size antenna for 80 40 to 10 meters and a 6 meter to 40 meter configuration. It is also well described how to build the impedance transformer and the loading coils for lower bands.

OMEGA+ Portable Radio

OMEGA+ radio is a compact and portable HF , 4m + 6m amateur radio Transceiver for QRP, Portable, SOTA operations.

The End-Fed Half-Wave Antenna - Presentation

Antennas/End-Fed/End Fed Half Wave Antenna
A very well done presentation about End-Fed Half-Wave antennas. This PDF document contains a summary of experiences in how to build custom EFHW antennas. Includes an interesting comparison table of UnUn configurations with recommended toroids, Wire size, turns and capacitors. An useful recap on common errors in building homebrew EFHW Ununs completes the document.

IARU HF Championship 2019

IARU HF CONTEST - The second full weekend of July, beginning 1200 UTC Saturday and ending 1159 UTC Sunday (July 13-14, 2019).

ICOM IC-R20

IC-R20 by Icom. Wideband Receiver Professional radioreceiver, allow double receiver, from HF to Microwave, digital recorde, DTCS, Memories and 11 hours countinuous reception.

The Antenna Torque Calculator

Technical Reference/Antenna Rotator
This unique online tool helps Ham Radio operators to choose the right rotator for medium and large HF antenna systems. The algorithm implemented in this calculator is the result of 40 years of experience in the HF Antenna sector. Given the Wind Speed, the total antenna square area, and the boom length, it will return the calculated torque value.

WSJT-X version 2.1.0 released

The WSJT Development Group is pleased to announce the general availability (GA) release of WSJT-X Version 2.1.0.

Top Amateur Radio Websites - Issue 1922

RDF with Raspberry PI and RTL-SDR, Barest of bones APRS RF position reporter, CRkits - manufacturer of ham radio QRP Kits, Coax Loss Calculator Online by K5VR, Radio N9SKN /P QRP Field Operations, Coax Cable Attenuation and Power Handling Online Calculator, MJ/OQ7A/P The Minkies Islands DX Pedition,

Balcony Mounted Buddistick Antenna by KP4MD

Antennas/Portable
The antenna handles 250 watts and covers 40 through 10 meters, with an optional add on coil for 80 and 60 meters. The author in this pages includes an interesting video in which describes the antenna setup, and the importance of the shunting coil on lower bands like 40 and 80 meters. SWR curves diagrams are also included and demonstrate the influence on resonating frequency of the shunting coil.

Icom IC-756PROIII - Icom UK Discontinued products

Radio Equipment/HF Transceivers/ICOM IC-756
A page dedicated tho the IC-756PROIII transceiver. This radio, discontinued, incorporates many of the features that made its predecessors so successful. However, the integration of the latest technology employed in the IC-7800 such as receiver technology, +30dBm class IP3, miniscope makes this new rig the very pinnacle of the IC-756PRO series.

Top Amateur Radio Websites - Issue 1923

Meteo Beacon in VHF with a Raspberry pi, Designing VHF/UHF Quad Antenna, FT8 Operating Guide - Weak signal HF DXing, PT40 7 MHz Transceiver by AA3SJ, RFzero, HamFM Classifieds, E31A Log Online,