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.
The winning article for the September 2018 QST Cover Plaque award is “Small Gap-Resonated HF Loop Antennas” by Kai Siwiak, KE4PT, and Richard Quick, W... Read more
The Doctor offers advice about antenna options for the upcoming ARRL Field Day. Read more
Description The fun and efficient way of learning morse code! Features: – Uses Koch’s training method (the most efficient known to date)... Read more
Source: LINK WSJTX 2.1.0RC5 Release! – The FT4 Protocol for Digital Contesting The FT4 Protocol for Digital Contesting by K1J... Read more
MFJ-1204 Includes radio interface cable (8-PIN DIN) Sign up for the digital revolution and explore a whole new world of amateur radio excitement using... Read more
FT8 is exploding! 1#popular HamRadio digital mode In this episode of the No Nonsense Amateur Radio Podcast, Tom, KB5RF, and I explore... Read more
RT3S dual band digital radio uses Digital Mobile Radio (DMR) Tier 2 Standard protocol. It is compatible with the popular MOTO TRBO series Tier I and I... Read more
“Welcome to my review of the Yaesu FT2/DR. A dual band analog fusion APRS transceiver. The first time I used this radio it was a train wreck. Le... Read more