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.
KC901S is a “RF multimeter”. It supports the analysis of single port vector network analysis and dual port scalar network analysis,... Read more
This demonstrates turning an Android Tablet (or Android Phone) into a highly portable comms receiver or spectrum analyzer operating from Long Wave to... Read more
JT DX JT65 – JT9 – T10 – FT8 – WSPR Guides JTDX_User_Manual_EN_2018_01_08.pdf – (English language by VK7YUM with... Read more
Recent sporadic-E propagation openings on 6 meters and elsewhere have pointed up the need for a digital mode having faster turnaround time than curren... Read more
Here’s the review of the Alpha Antennas Magnetic Loop. Stay Tuned for the big 3 way shootout with the Chameleon P Loop & the Alexloop. I... Read more
“Generators” is the topic of the new (June 22) episode of the “ARRL The Doctor is In” podcast. Listen…and learn! Sponsored by DX Engineering, “A... Read more
Jim, W6LG looks at http://www.sherweng.com/table.html website with extensive detail about receiver performance. Read more
The CHA F-LOOP 2.0 was designed with portability, ease of use simplicity, ruggedness and high performance in mind. Unlike any other similar antennas o... Read more