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.

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.

SWR of Several Mobile Antennas

I had occasion to test four popular amateur radio mobile antennas. Here are the results of SWR and Return Loss of a Diamond SG7900ANMO, Larsen NMO 2/70, Cushcraft CS-270M and Laird QW144.

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.

Ham Question: Kenwood TM-G707 Display Erratic

Hello all,

I wonder if any of you had your display unit for your Kenwood TM-G707 2/440 transceiver go blank and reboot even while the radio operates just fine.

If I move the wire with respect to the control head in a certain position this happens.

Is this just a case of dirty contacts between the little cable adapter and the control head or have any of you seen the wire in the cable actually break?

Read moreHam Question: Kenwood TM-G707 Display Erratic

Long HT Antennas May Harm HT Radios

If you are like many recently licensed Amateur Radio operators your first purchase may well be a good Icom, Kenwood, Yaesu or other brand Handy-Talkie or HT two way radio. These are most frequently for the 2 meter and 70 centi-meter bands (144 and 440 MHz).

The antenna that comes with your radio is probably about 8 inches long and is a compromise between convenient length and performance.

Read moreLong HT Antennas May Harm HT Radios