The May/June issue of QEX, ARRL’s bimonthly magazine for experimenters, is off the press and in the mail!
In this issue . . .
Michael Knitter, DG5MK, describes a complex-impedance analyzer that uses a heterodyning technique and high resolution ADCs to get good accuracy at low cost.
Robert H. Sternowski, WBØLBI, uncovers old measurements, which show that vertically and horizontally polarized noise can differ by tens of decibels in the lower HF bands.
Paulo Renato F. Ferreira, PY3PR, updates the Octopus V/I curve tracer by providing selectable scanning voltages for testing.
Maynard A. Wright, W6PAP, provides Octave software for computing the performance of transmission lines having a complex characteristic impedance.
Riccardo Gionetti, IØFDH, describes an automatic tracking filter for a DDS generator.
Euclides Lourenço Chuma, PY2EAJ, describes a modern RF power meter with accuracy that rivals the best commercial RF power meters.
DXplorer™ is a unique web-based system providing facilities for on-air antenna system testing and comparison as well as real-time HF propagation analy... Read more
14 MHz OWA yagi beam – MOMOBEAM MONO 5 20 is a fullsize antenna for the band of 20 meters (14 MHz OWA beam) designed for maximum performance. M... Read more
DX Hunter – The amateur radio App for DX-enthusiasts Description DX-Hunter is an application for amateur radio operators, short wave listeners a... Read more
Champion RTTY contester Don Hill, AA5AU, of Louisiana may be the first US radio amateur to operate SO2R (single operator, two radio) remotely in an RT... Read more
Ask Dave 71 reviews the MFJ cobweb antenna, covering 20 through 10 meters. MFJ recently came out with a modification kit, adding 30 and 40 meters. Thi... Read more
“In this video is almost all the Rigexpert antenna analyzers, thanks to GigaParts.com for letting me borrow them all. I will be making some vide... Read more