OCF Masters Articles
Instructions for Tuning an Antenna
Introduction In this appendix we introduce a process for efficiently tuning an antenna using a 40-meter dipole as an example. We know that tuning must be done at the height...
Instructions for Tuning an Antenna
Introduction In this appendix we introduce a process for efficiently tuning an antenna using a 40-meter dipole as an example. We know that tuning must be done at the height...
OCFMasters White Paper: Different Cores for End...
Our article in CQ, December 2021, discusses the process we went through finding the combination of popular cores that would meet these goals. However, the quest for the “perfect solution”...
OCFMasters White Paper: Different Cores for End...
Our article in CQ, December 2021, discusses the process we went through finding the combination of popular cores that would meet these goals. However, the quest for the “perfect solution”...
New Wire Antenna Book available on this website.
We start with a chapter that has most of what you need to know about dipoles to understand how they work followed by a build project aimed at new Technician...
New Wire Antenna Book available on this website.
We start with a chapter that has most of what you need to know about dipoles to understand how they work followed by a build project aimed at new Technician...
OCFMasters.com team wins Second QST Cover Plaqu...
The OCFMasters.com team, Bob Glorioso, W1IS, and Bob Rose, KC1DSQ, won their second QST Cover Plaque Award in a year for their article in the March 2022 issue of...
OCFMasters.com team wins Second QST Cover Plaqu...
The OCFMasters.com team, Bob Glorioso, W1IS, and Bob Rose, KC1DSQ, won their second QST Cover Plaque Award in a year for their article in the March 2022 issue of...
Portable 20-Meter Phased Dipole Beam
This two-element phased dipole beam is designed to be hung between two trees and easily transported. This makes it perfect for ARRL Field Day, Parks On The Air activations, DXpeditions,...
Portable 20-Meter Phased Dipole Beam
This two-element phased dipole beam is designed to be hung between two trees and easily transported. This makes it perfect for ARRL Field Day, Parks On The Air activations, DXpeditions,...
Portable Phased Dipoles for 20m
Phasing waves, acoustic, radio, radar, etc. is a way of directing energy where you want it. We have all had the challenge of “phasing” our stereo speakers to get a...
Portable Phased Dipoles for 20m
Phasing waves, acoustic, radio, radar, etc. is a way of directing energy where you want it. We have all had the challenge of “phasing” our stereo speakers to get a...
A Suspended Quarter Wave 40 Meter Wire Vertical...
The antenna described here is now in its second incarnation. The first version, thrown together to try it out, finally needed to be replaced after being up for nearly 20...
A Suspended Quarter Wave 40 Meter Wire Vertical...
The antenna described here is now in its second incarnation. The first version, thrown together to try it out, finally needed to be replaced after being up for nearly 20...
A Deep Dive into End-Fed Half-Wave Antennas (Or...
All hams know dipole antennas for their simplicity and the fact that the impedance of a dipole, about 70 ohms, is a good match to our commonly used 50-Ohm feedlines....
A Deep Dive into End-Fed Half-Wave Antennas (Or...
All hams know dipole antennas for their simplicity and the fact that the impedance of a dipole, about 70 ohms, is a good match to our commonly used 50-Ohm feedlines....
A Deep Dive into End-Fed Half-Wave Antennas (Pu...
Virtually all hams know dipole antennas for their simplicity and the fact that the impedance of a dipole, about 70 ohms, is a good match to our commonly used 50-ohm...
A Deep Dive into End-Fed Half-Wave Antennas (Pu...
Virtually all hams know dipole antennas for their simplicity and the fact that the impedance of a dipole, about 70 ohms, is a good match to our commonly used 50-ohm...
My Dipole Has Gain!
Many antenna manufacturers specify gain figures in seemingly mysterious terms that are often difficult to interpret. This article provides a framework to assist you in understanding the terms.
My Dipole Has Gain!
Many antenna manufacturers specify gain figures in seemingly mysterious terms that are often difficult to interpret. This article provides a framework to assist you in understanding the terms.
A Portable Two-Element 40-Meter Wire Beam
Impending Field Day many years ago was the genesis of W1IS’s efforts to build a portable 2-element 40M wire beam. After several years and iterations with more or less success...
A Portable Two-Element 40-Meter Wire Beam
Impending Field Day many years ago was the genesis of W1IS’s efforts to build a portable 2-element 40M wire beam. After several years and iterations with more or less success...
A Portable Two-Element 40-Meter Wire Beam
We wanted an effective Field Day antenna, so we designed this portable two-element 40-meter wire beam. The design goal was for a beam with 10-foot element spacing, so the spacers...
A Portable Two-Element 40-Meter Wire Beam
We wanted an effective Field Day antenna, so we designed this portable two-element 40-meter wire beam. The design goal was for a beam with 10-foot element spacing, so the spacers...
A New Design of a 40-6-Meter Off-Center-Fed Dipole
You might know that a 40-meter dipole is also usable on 15, since 21 MHz isan odd harmonic of 7 MHz. But as W1IS and KC1DSQ explain, you’re still goingto...
A New Design of a 40-6-Meter Off-Center-Fed Dipole
You might know that a 40-meter dipole is also usable on 15, since 21 MHz isan odd harmonic of 7 MHz. But as W1IS and KC1DSQ explain, you’re still goingto...
Hybrid Balun Testimonial
I built the Hybrid Balun as described by OCF Masters and in a recent article in CQ magazine. The build was easy, I sourced parts from Mouser and bought the...
Hybrid Balun Testimonial
I built the Hybrid Balun as described by OCF Masters and in a recent article in CQ magazine. The build was easy, I sourced parts from Mouser and bought the...
Baluns Basics: What’s a Balun? Why a Balun? How...
“Balun” (BALanced to UNbalanced) is a catch-all term for a variety of devices we use on our antenna-feed- line systems. This article will take a brief look at what they’re...
Baluns Basics: What’s a Balun? Why a Balun? How...
“Balun” (BALanced to UNbalanced) is a catch-all term for a variety of devices we use on our antenna-feed- line systems. This article will take a brief look at what they’re...
A Simple Dual-Band Upgrade for Your 40-Meter Di...
During this lull in the solar cycle, 40 meters has been the best band for both local and DX contacts. Now that the sunspots are coming, other bands will soon...
A Simple Dual-Band Upgrade for Your 40-Meter Di...
During this lull in the solar cycle, 40 meters has been the best band for both local and DX contacts. Now that the sunspots are coming, other bands will soon...
End Effect and Harmonic Antenna Design
This article takes you through the design of a 40 M dipole that many hams also use on the third harmonic, 15 M. In the process it starts with the...
End Effect and Harmonic Antenna Design
This article takes you through the design of a 40 M dipole that many hams also use on the third harmonic, 15 M. In the process it starts with the...
Diagram Correction June 2020 CQ Magazine
Please see our latest OCF article in the June 2020 CQ Magazine. Click here to view our article. Correction for June 2020 CQ Magazine article: Questions? Email us at: w1is@arrl.net
Diagram Correction June 2020 CQ Magazine
Please see our latest OCF article in the June 2020 CQ Magazine. Click here to view our article. Correction for June 2020 CQ Magazine article: Questions? Email us at: w1is@arrl.net
Multiband Off-Center-Fed Dipoles for 160 & 80 M...
If you need a multiband wire antenna and your rig’s built-in antenna tuner can’t deal with the high SWR of a G5RV on some bands, KC1DSQ and W1IS have another...
Multiband Off-Center-Fed Dipoles for 160 & 80 M...
If you need a multiband wire antenna and your rig’s built-in antenna tuner can’t deal with the high SWR of a G5RV on some bands, KC1DSQ and W1IS have another...
The Design Principles of OCF Masters Antennas
The Design Principles of OCF Masters Antennas Introduction: Off Center Fed Dipoles are popular multi-band antennas. They work pretty well, but the resonances don’t line up in all the bands...
The Design Principles of OCF Masters Antennas
The Design Principles of OCF Masters Antennas Introduction: Off Center Fed Dipoles are popular multi-band antennas. They work pretty well, but the resonances don’t line up in all the bands...
A Different Twist on a Dual-Band VHF/UHF J-Pole
WA5VJB has been busy stringing antennas between satellites — in orbit — and wasn’t able to finish his planned column for this issue. Filling in for Kent this month is...
A Different Twist on a Dual-Band VHF/UHF J-Pole
WA5VJB has been busy stringing antennas between satellites — in orbit — and wasn’t able to finish his planned column for this issue. Filling in for Kent this month is...
