Where a choke chokes
I measure one example of a ferrite coax choke for response over frequency to understand its suitability for VHF and UHF.
EFHW HT antenna functions without additional counterpoise
EIRP measurements of the 2m end-fed half-wave HT antenna from MFJ aids understanding a dipole is a dipole no matter where you feed it.
WWVB DX Virgin No More
Thanks to a spiffy new Airspy HF+ SDR receiver I can scratch listening to WWVB off the bucket list.
MFJ-259 Battery Holder Repair
My MFJ-259 HF/VHF SWR Analyzer required yet another repair to its internal battery holders.
NIST takes aim at WWVB, WWV and WWVH
The National Institute of Standards and Technology appears to have the time and frequency broadcast stations on the chopping block given the info contained in their 2019 budget proposal. This is what I wrote to my senator and congressman.
DX Engineering supports AHVD antenna
DX Engineering supports the build of the Asymmetrical Hatted Vertical Dipole (AHVD) antenna with standard and two custom parts.
When antenna tilt matters
We test a popular VHF/UHF dual band antenna at various angles to reveal antenna tilt on a vehicle matters only in certain circumstances.
The self-absorbed ham
A writer details how his ham father dissed his family by losing himself in technology. The story serves as a canary in the coal mine for “social media” then and now.
NVIS works very well… except when it doesn’t
Near Vertical Incident Skywave (NVIS) propagation works wonders when the bands cooperate, but can slam the door shut at any moment.
Diamond NR770HBNMO vs. Comet M-24M
The Diamond Antenna NR770HBNMO paired with their K515S insulated luggage rack mount provides measurable and observable upgrade for my 2015 Subaru Forester 2m/440 mobile.
Radials mitigate feedline and mast currents, tests reveal
Antenna patterns from a Diamond X50NA reveal how radials of proper size mitigate current running down the feedline and mounting structure.
Hurricane Maria, Puerto Rico and how hams helped
Compare and contrast conflicting accounts of the amateur radio response to Hurricane Maria featuring what worked well, what didn’t and why resourceful hams combat nature and management.
J antenna and variations thereof
There are many ways to morph the basic J antenna into useful forms.
Sunspots and HF propagation
QSO data from a state QSO party reveal trends in HF usage correlating with sunspot numbers.
Virginia Packet Fund Raiser
The organizers of the Virginia Packet Network are asking for a few bucks to expand service outside of Virginia.
J Antenna Design Patent Grant
USD798847S1 showcases one more incremental step towards a J antenna that works with masts and feedlines.
Passing ARRL Field Day messages the easy way with packet radio
Here is a video of a Virginia amateur radio group passing field day bonus point messages off site using packet radio.
Mast Mountable Antenna Patent Application
The “mast mountable antenna” patent application is now available to review and critique.
N9TAX 2m Slim Jim Antenna Review
Erroneous specs aside, the N9TAX VHF SlimJim antenna is an exemplary dipole.
The limits of aluminum antenna tubing
Aluminum comes in varying grades and the Diamond Antenna CP22E demonstrates why not all aluminum is created equal.
KG3V Ham Radio Blog
Real experience with real experiments yield a wealth of information valuable to hams far and wide.
Low profile 2m/440 mobile installation
Video showcases a nice, clean, professional installation of a 2m/440 transceiver into Hyundai sedan.
Runt radials
Antennas shipping with ineffective antenna decoupling are on the rise as manufacturers daringly advocate 1/12 wave radials work.
Diamond CP22E Antenna Review
Despite some antenna gain hype, the Diamond Antenna CP22E 2m base station antenna is a remarkable design achieving 5 dBi directivity in a slim low-profile design.