Today, there are two sunspots in the sun’s southern hemisphere. Their magnetic polarity reveals something interesting: They come from different solar cycles. Take a look at this magnetic map of the sun’s surface (with sunspots inset) from NASA’s Solar Dynamics Observatory:
One sunspot (AR2760) belongs to old Solar Cycle 24, while the other (AR2761) belongs to new Solar Cycle 25. We know this because of Hale’s polarity law. AR2760 is +/- while AR2761 is -/+, reversed signs that mark them as belonging to different cycles
Source:https://spaceweather.com/
Antenna
Stretching Antenna Bandwidths
Often on the HF bands, we find that the quoted antenna frequency bandwidth is not wide enough to cover the whole band. This can be a particular proble... Read more
HF Multiband Vertical Antenna – FALCON OUT-250B
The FALCON OUT-250B is a Short Wave Multiband Vertical antenna (WARC incl.) with flat SWR across the bands. In this video I assemble, install, test, c... Read more
Chameleon Tactical Delta Loop – Antenna Review
The Chameleon Tactical Delta Loop covers 80 meters through 6 meters. and will handle 100 watts on SSB and 50 watts CW/Digital. Its a great portable an... Read more
End Fed Dipoles : So I need a Counterpoise?
Kenneth, WB3JFR, encouraged this question. Do you need to use a counterpoise just because its “End Fed”? Read more
Antenna Review | MFJ Ham Stick
MFJ Ham Stick Read more
Review
Yaesu FT5DR Ham Radio Handheld Unboxing
Brand new from Yaesu is the FT5D Dual Band Fusion Handheld Ham Radio. Let’s take a look at this brand new HT and compare it to the FT3D, its pre... Read more
Solar Power for Ham Radio, a presentation – Ham Radio Q&A
This is an educational presentation I gave on setting up a solar system for use with amateur radio. It goes into the components necessary and talks on... Read more
RTL-SDR RF Filters
In this video, we take a look at how RF filters work and how you can improve signals when using an SDR, in this video we use the RTL-SRD reviewer and... Read more
Ham Radio Bicycle Mobile: Using APRS to track a marathon – Ham Radio Q&A
“Our amateur radio club provides health and welfare communications for the participants of the Wausau Marathon. This year I was the ‘bike... Read more
SunSDR2 Pro, Expert Electronics FULL SDR Review/Demo, HF/6M/VHF
Checking out the SunSDR2 Pro by Expert Electronics, a full DUC/DDC HF/VHF software defined radio that will please even the most demanding ham radio op... Read more
News
ARRL, RSGB Announce Joint Events to Celebrate Centenary of Ham Radio Transatlantic Success
ARRL and the Radio Society of Great Britain will jointly sponsor events to celebrate the achievement of transatlantic communications by radio amateurs... Read more
Unboxing the Radioddity GD-AT10G
Dave has recently been sent a handheld radio from Radioddity. Let the unboxing begin! 10W/5W/2.5W/1W Selectable: The Radioddity GD-AT10G is a pow... Read more
IARU Region 1 Monitoring System Says Radio France International Splatter “Untenable”
The International Amateur Radio Union (IARU) Region 1 Monitoring System (IARUMS) August newsletter reports that Radio France International was active... Read more
How to Renew Your License
Natalie, KK4FLA, has one question that is very simple but still important. “How does one renew his license?” Read more
Next SpaceX Commercial Crew to ISS Comprised of Radio Amateurs
Four radio amateurs will head to the International Space Station (ISS) aboard a commercial flight, thanks to Amateur Radio on the International Space... Read more
VHF
Alinco DR-MD500T Dual Band DMR Mobile Radio
New from Alinco is the DR-MD500T, then dual band DMR mobile version of their popular dual band DMR HT. DR-MD500T Dual Band Mobile DMR VHF/UHF Portable... Read more
Using MFJ-916B Duplexe
David, N9BSA, is trying to merge two antennas using a Diamond Phasing Harness ss770r, but Dave has a better suggestion…. The MFJ-916B duplexer i... Read more
Yaesu FT5DR First Look, Features And Comparison FT3DR & FT2DR
The Yaesu FT5DR is shipping fast from Ham Radio Outlet, I got mine today, so lets test is out against its brothers, the FT3DR and FT2DR Read more
Yaesu FT5D Unboxing and First Impressions!
The new Yaesu FT-5DR is a full-featured C4FM handheld transceiver with superior operability and new sophisticated functions. Even in a compact body (W... Read more
Use a Crossband Repeater Instead
“Ken, N2DF, is having trouble with his HT because of his metal house. He is unable to connect and communicate. He is wondering if he can the end... Read more