Cutting Copper for 6m LFA Yagi
Here is a step by step photo album showing how I prepared home center copper pipe for use in a three element Loop-Fed-Array Yagi-Uda antenna (aka LFA Yagi Antenna).
Copper 6m Coplanar LFA Yagi-Uda
The Coplanar Loop Fed Array (LFA) Yagi-Uda design from G0KSC provides an excellent design foundation for an all copper version of a 3 element 6m balunless beam with superior front to back performance. Shown are comparisons between model simulations and prototype measurements.
Coplanar Loop Fed Array LFA Yagi-Uda Antenna
The clever application of the folded dipole loop, computer science iteration techniques and NEC simulation to Yagi-Uda design results in a panoply of practical planar Loop Fed Array, LFA Yagi antenna recipes.
Improving the Super-J
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.
Stony Man AT Golden Packet 2012
Results from station 6 of the Appalachian Trail Golden Packet attempt from Stony Man mountain.
KX4O 1B VA Field Day 2012
Even a 1B ARRL Field Day Station offers visitors a rare glimpse into Amateur Radio.
Geo. Coordinate Transmission Efficiency
What’s the best format to send your geographic coordinates using Morse Code? Degrees, Degrees-Minutes, Degrees-Minutes-Seconds, Grid Squares? We take a look at the various formats and use a stopwatch to measure the send time.
Field Day Logging Computer Networking Tips
Learn from our six successful years rolling out a computer network for the ARRL Field Day. Tips, techniques, dos and don’ts are among the highlights.
EFHW LNR Precision EF-10/20/40MKII Test Data
Basic tests of the LNR Precision EF-10/20/40 multi-band portable HF EFHW antenna including S11, SWR and a bandwidth check of the match box.
EFHW LNR Precision EF-10/20/40MKII Examination
The background and details of the LNR (Par Electronics) EF-10/20/40 end fed half-wave multi-band portable HF antenna. Come see what’s inside the mysterious “black box.”
Extreme NMO – Subaru, Silver and the 60″ Whip
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.
VAQP 2012 – Join in the Fun
Fun times await participants in the 2012 Virginia QSO Party. This post links to Official Rules, Information and Past Statistics.
Hawksbill Mtn. APRS Appalachian Trail Test
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.
Antenna Measurements on Taurus 2m Whip
Return Loss and SWR measurements of a permanent 2m whip installation mid-roof of a Ford Taurus. The effect of doors is shown.
NMO Through-Hole Mobile Antenna Installation
Highlights from the installation of a 3/8 inch NMO permanent mount into a 1998 Ford Taurus rooftop.
J-Pole Antenna – Should I ground it?
To function as intended, the J-Pole antenna needs RF electrical isolation from its mount. Here’s why and in technicolor no less.
Help: How can I Migrate Microsoft Works 2004 Logs to New Program
K3CDQ asks: I have an old computer with lots of 2002, 3 and 4 software on it. I have thirty years of ham contacts logged in a data base that I worked up using Microsoft Works 2004. I now have a new computer with all 2010 and 2011 software on it and running XP. I … Read more
Installing Ground Rods the Easy Way
Ground Rods… so easy a pre-teen can do it. Presented is a method learned from other hams on how to install a ground rod with minimal or no hammering. Using a watering can, even children can sink an 8 foot ground rod into the ground. All it takes is water and time.
Hexbeam Gets a Spine
My G3TXQ Hexbeam gets a new metal backbone to accommodate a VHF beam antenna. A byproduct is a much stronger antenna assembly than the common Hexbeam approach.
‘UHF’ Connector Test Results
Real measured data reveal the UHF (PL259 and SO239) connectors have real limitations.
Lab Tests: SMA, BNC, TNC and N Connectors
Lab tests show post WW2 connector designs perform exceptionally well up to 500 MHz. The SMA, BNC, TNC and N connectors are great.
PL-259/SO-239 Return Loss and Attenuation Test
We pit the PL-259 (and SO-239) against more recent connectors. This is the list of contenders plus a description of the test setup.
Pretty Lousy? (PL) 259 Connectors
The PL259/SO239 (aka UHF) connectors have harsh critics and religious defenders. Questionable measurement techniques complicate matters. Let’s clear things up.
HALLICRAFTERS SX-28A – Smoldering . . . _ _ _ . . .
Hello everyone, I have been getting back into radio after a 16 year ‘sabatical’, and I could really use your help, as last night’s events have kept me awake all night………. I bought a Hallicrafters Super Skyrider SX-28AU (the U is the model with the optional 230V power supply) 2 weeks ago. I paid Top … Read more