DXZone.com

Top Amateur Radio Websites - Issue 1927

How to build a Coax Balun 1:4 and 1:1, An Automatic Antenna Tuner , HG7AN Antenna Analyzer, F5RDS remote station setup, Unun vs Balun - Configurations and differences, G0HWC New Ham Shack, World Wide Digi DX Contest

The Cubical Quad is Beautiful

Antennas/Quad
An interesting page about Quad antennas. Modelling QUAD antennas, comparing quad antennas to yagi antennas. Information on QUAD Antenna tuning and home brewing with help on calculating dimensions and tuning.

Top Amateur Radio Websites - Issue 1928

F5RDS remote antenna tuner, The Great Ham Radio Desk Project, Homemade Magnetic loops antennas by F5RDS, QRPparts, RADIG Hombrew Software Defined Radio Project, Ham radio shack desk project, Omega Radio, 3 element Yagi Antenna On-line Caluclator, Score Distributor - Ham Radio Contest Score Forwarder,

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.

miniVNA PRO Modifications

Technical Reference/Vector Network Analyzer
The mini Radio Solutions miniVNA PRO is the only affordable vector network analyser (VNA) I know of that offers remote wireless operation. This is very interesting because it allows to measure the input impedance of HF antennas installed at height without having to deal with coax cable lengths, baluns nor common mode suppression chokes. However, to render the miniVNA PRO truly field proof, it requires a number of significant modifications.

Icchipword

Shopping and Services/Electronic Components
ICChip, as an electronics-guide website, provides you with the industry professional electronic components data sheets, parameters, packaging and brand manufacturer information, as well as product-risk assessment and control, other environmental conflict mineral procurement and reporting solutions. Hope these semiconductors and electronic components data in each document can solve your problems and meet your requirements.

Antuino - Antenna Test Equipment

Technical Reference/Test Equipment
Antuino is an accurate instrument that can be used in the field to measure SWR, field strength, modulation, etc. In the lab, it can be used to sweep filters, measure gain, distortion, frequency response, etc. It works upto 150 Mhz. On the third harmonic, it is usable on 435 Mhz band as well (with reduced sensitivity).