DXZone.com

Elecraft K4 - New Product

Elecraft introduces the K4 High Performance Direct Sampling SDR Modular hybrid architecture Next-generation features, operating convenience, and style

Barest of bones APRS RF position reporter

Technical Reference/APRS
Super Simple APRS Position Reporter. This project idea has been in response to the more hardware heavy Raspberry Pi projects that involve extra TNC hardware, additional sound cards, and custom cabling. This APRS position reporter is done using a Raspberry Pi B+, USB GPS receiver, Baofeng UV-5R, and a mono 3.5mm audio cable between the Pi and HT.

ADALM-PLUTO SDR

Manufacturers/Software Defined Radio
The Adalm Pluto by Analog Devices is a Portable self-contained RF learning module, based on Analog Devices AD9363--Highly Integrated RF Agile Transceiver and Xilinx® Zynq Z-7010 FPGA. Includes one transmitter and one receiver, half or full duplex and cover 325 MHz to 3.8 GHz

ICOM IC-7610 review by PD9Z

Radio Equipment/HF Transceivers/Icom IC-7610
PD9Z reviews the ICOM new IC-7610 with a list of surprising features he has found on this transceiver. Signal reception performances are one the mosto valuable features found on this high-end RTX by ICOM. Along to his review you can access several other resources related to the IC-7610 including manuals, tips and tricks, videos, and configuration settings to be implemented in order to be used with Heil Sound headsets.

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.

Long Wire Antenna for portable operations

Antennas/Wire
With the view to establish a quick and easy multi-band antenna deployment for portable and camping operations a simple long wire antenna with an earth or earth plus counterpoise arrangement with a 9:1 voltage unun including a tuner or simply with a tuner is one possible solution. With the 9:1 voltage unun and wire lengths suggested in the below tables the antenna should present non extreme impedances for all HF amateur band frequencies. This page is far from complete and represents the ongoing investigation into this type of antenna. Experiments to date seem to have raised more questions than obvious answers.

Top Amateur Radio Websites - Issue 1916

Portable Dipole Antenna for 7 MHz, The VHF/UHF DX Book, Ham Radio Loop Antenna, QSO map generator, North Korea - P5/4L4FN, Alpha 87a Amplifier Fault 1, Receiver Protection in SO2R and Beverage Antennas, 16th HST World Championship

Top Amateur Radio Websites - Issue 1917

Fan Dipole Antenna for 40 20 and 6 meters, Antenna Maria Maluca, GridMapper WG7J, MARS Mod for the Yaesu FT-450D, HamThreads, Best Practices for DXpedition Operating DX University, DX Pedition Audio Recordings

Coax Loss Calculator Online by K5VR

Technical Reference/Coax Cables and Connectors
RF Feedline (Coax and Ladder-Line) Loss and ERP Calculators made with Javascript. This complex feddline loss calculator has already several line types paramenters for most common coaxial cables from Belden, Time LMR, Wireman and other common products. Result will give Matches loss, SWR loss, dB and Watts power loss.

Build your own RF-Choke

Antennas/Feed Lines/Choke
How to make an effective RF Choke. The coiled coax choke is the easiest to make but also the least effective. This article includes some general guidelines for winding coax chokes on a 10cm PVC pipe using RG-58 or RG-213 coax cable.

DX HOLIDAY

DX Resources/Shack Rental
DX-HOLIDAY is a DX holiday and DXpedition holiday-style dedicated website which provides excellent information on a range of pertinent topics such as: organize a DX-holiday in remote area, organize DXpedition holiday-style with your family, booking and negotiating with hotels, obtaining a foreign amateur radio license, rent a radio shack and antennas during your holiday, travel documentation & money matters, health, emergency, and weather issues

Delta Loop DX Antenna for 40 meters band

Antennas/40M/40 meter Delta Loop Antennas
A monoband delta loop antenna for the 7 MHz. This vertically polarized DX Antenna is a full wavelength sngle side antenna and has a total length of 42.3 meters (137,1 inch) Can be easily setup with a flag pole or fishing pole as center top mast. For optimal performance lower side should be at 2 meter above the ground. This antenna offers a low radiation angle and 1 DB Gain.