RadCom Plus
RadCom Plus, Vol. 5, No. 1
To read this edition, tap or click the cover image Contents 3 Wide dynamic range field strength meter Thomas M. Alldread, VA7TA, describes his wide dynamic range field strength meter 19 Elevating an antenna with anti-phased elements Tony Preedy, G3LNP, shows us how to achieve the enhanced performance of a high 7MHz antenna at a […]
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 […]
