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.

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

Hoverman VHF Elevation Measured Antenna Pattern

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.

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.

Improving the Super-J

Full view of various Collinear J-Poles

The traditional collinear J-Pole, aka Super-J, improves the basic J-Pole. Are further improvements possible? By replacing the phasing stub with a simple coil, the answer is yes. The result is the Collinear J-Pole.

Extreme NMO – Subaru, Silver and the 60″ Whip

Daughter asks for 3rd time if Mom knows I'm drilling a hole in the car.

A reinforced Subaru through-hole NMO installation using silver epoxy and a metal plate stiffener accommodates the 62 inch Diamond SG7900A dual-band mobile antenna.

Hawksbill Mtn. APRS Appalachian Trail Test

This is the view as you approach the top of Hawksbill on the only trail.

The Northern Virginia team of Ham Radio operators and companion hikers manned Hawksbill Mountain for the 2011 Appalachian Trail Golden Packet event. Gear included a Kenwood D710 with Green Light Lab GPS, 2m Collinear J-Pole and a 70cm collinear J-Pole.

Confirming Radio Mobile in the AT Golden Packet Attempt

I have experimented with Radio Mobile for a few years. If you have not tried using it, you should. It is a free RF link analysis program that uses geographic elevation data to help you determine the obstacles between two radio stations.

The details of this program’s capabilities are too numerous to mention here so please visit the web site here…

Read moreConfirming Radio Mobile in the AT Golden Packet Attempt

Jpole vs. Coaxial Dipole EZNEC Shootout

This J-Pole, Monopole, Coaxial Dipole VHF EZNEC shootout addresses a comment made that no models exist for j-pole and coaxial dipole antenna simulation.