KX4O/P VQP 2015 Expedition from MPX
Operating QRP portable from the back of a Subaru during activation of the rare VQP city of Manassas Park (MPX).
Have your J-Pole and ground it too
Tame the predictable mast currents found in any j-pole antenna grounding conductive mast using a simple stub. Shown is empirical evidence why this is a problem and a very simple solution all future grounded j-pole antennas should incorporate.
Copyrights, Designs and Intellectual Property
Is anyone else confused by the control some antenna designers try to maintain over the use of their unpatented creations?
New Choke Configuration for AHVD
Shown is a better configuration to fasten a choke to the Asymmetrical Hatted Vertical Dipole antenna.
APRS AT Golden Packet 2014 NoVA Report
2014 Appalachian Trail Golden Packet report from Hawksbill (aka Northern Virginia) Station #6
APRS Golden Packet Gear
Shown is a minimal, but effective collection of gear for the APRS Golden Packet Appalachian Trail event.
Diamond X50 Antenna Measurements
I measured the SWR and Return Loss of a loaner Diamond X50 antenna.
3D Model for AHVD Antenna
Presented is a 3D E-Drawings rendering of the Asymmetrical Hatted Vertical Dipole antenna.
Elecraft KX3 Heatsink
The Elecraft KX3 heatsink modification improves digital performance and extends reliability for all modes.
WWV @ 25MHz?
WWV apparently switched on its 25 MHz transmitter for a short while to give the old timers something to talk about… WWV’s 25 MHz Signal Back on the Air Have a listen while you can. John
Sound of a Sinking Ship
Listen to the Morse code interchange between a sinking cruise ship and fellow ships.
The Coaxial Dipole
G4CQM provides details on a Yagi-Uda coaxial dipole driver approach for designers lusting after a 50 ohm self-balancing feed.
Repeaters, Antennas & Trigonometry
You need an antenna with energy at high take off angles to hit the hill top repeaters… right? Well, not likely. Let’s review the details and do the math to understand what’s needed for VHF terrestrial radio communication.
Hoverman TV Antenna Measurements
Doyt Hoverman’s 1960s TV antenna design placed over a simple reflector screen provides impressive performance for today’s UHF and VHF-HI television bands.
AHVD – End Caps come in bag of 20
Please note the end caps in the KX4O-000049 drawing show quantity 3, but they come in one bag of twenty. Don’t buy three bags.
AHVD at Richmond Frostfest
The Asymmetrical Hatted Vertical Dipole was on hand at the Richmond Frostfest where the most popular question concerned the bandwidth of the antenna.
SOTA HNY Activation
KX4O/p Summits on the Air (SOTA) activation of Hawksbill Mountain (W4V/SH-001) on New Year’s Eve on 40, 20 and 10 meters.
AHVD Winter Wonderland
The Asymmetrical Hatted Vertical Dipole (AHVD) worked quite well for some 10m contacts even with a load of ice on the elements.
Rose’s KX3 Case and Cover
Protecting your portable radio gear is important and Rose’s Elecraft KX3 Case and Cover accomplish this nicely.
HF AHVD on 6m – Practical?
Will the KX4O version of the 20-10m Asymmetrical Hatted Vertical Dipole work on 6m? Yes, sort of.
LED Light Bulbs
LED light bulbs are ‘bright’ alternatives to make ridiculously small table lamps provide useful illumination while maintaining low radio interference. The name brands have less RFI.
LED Ceiling Lights
I check the tendency for Phillips LED Lights to generate radio frequency interference (RFI) and how XYL friendly they are.
Baofeng UV-5R HT – Low Cost, High Value
The Baofeng UV-5R provides modest quality with a low price yielding high value. This HT can literally be a Christmas stocking stuffer.