RadCom Plus
RadCom Plus, Vol. 4, No. 1
To read this edition, tap or click cover image Contents 3 VnArduino An Arduino VNA: vector network analyzer 11 The pros and cons of multiband inverted-V antennas Investigates the radiation performance of multiband antennas when deployed in horizontal or inverted-V configurations 16 A single frequency repeater Simultaneous FM Tx + Rx at VHF, as first […]
RadCom Plus, Vol. 3, No. 1
To read this edition, tap or click cover image Contents 4 Vertical phased arrays from compromised locations John Matthews, G3WZT wanted to improve his antennas for 80m when he decided to go US county chasing, but only on 80m CW 14 Simple APRS tracker Anthony Le Cren, F4GOH designed this little low-cost FM transmitting card […]
RadCom Plus, Vol. 2, No. 2
To read this edition, tap or click cover image Contents 4 Third Method narrowband direct upconverter for the LF/ME bands Following on from the circuit published in the May 2016 RadCom, Andy Talbot, G4JNT discusses the issues and solutions for making a direct SSB upconverter that is suitable for audio or digital modes 10 A […]
RadCom Plus, Vol. 2, No. 1
To read this edition, tap or click cover image Contents 4 DATV video link Construction, testing and characterisation Mark Atherton, ZL3JVX has been working on a 1.3GHz digital video shack-to-repeater link using a custom DVB-S modulator and an off-the-shelf satellite receiver. This article documents some of the equipment that was constructed along the way. 16 […]
RadCom Plus, Vol. 1, No. 2
To read this edition, tap or click cover image Contents 1 A position reporting system using WSJT weak signal data modes Andy Talbot, G4JNT devises a method for sending highly accurate location information with excellent weak signal performance 6 A home-built all-digital PAL vectorscope Inspired, apparently, by a dodgy T-shirt, this FPGA-based project by Mark […]
RadCom Plus, Vol. 1, No. 1
To read this edition, tap or click cover image Contents 4 The DG8 Ian White, GM3SEK builds a low-cost, high performance masthead preamp for 2m that uses a novel method of Tx/Rx switching 12 Building a Dual Z-Match Covering 1.8MHz to 146MHz, Bob Burns, G3OOU designed this wide frequency range dual Z-Match for use with […]
