Articles – Page 2

Instructions for filing online applications for appearing in Amateur Station Operators Certificate (ASOC) Examination and issuance of certificates/license.

July 5, 2020July 5, 2020QRZ India

1. Applicant shall first register themselves as an indivudual on Saral Sanchar Portalhttps://saralsanchar.gov.in . The login credential shall be send to the authorizedperson’s registered email ID and mobile number through which the applicant maylog in to the portal.2. The applicant needs to fill the application /registration forms with due care to avoidany error(s). The applicant […]

Toroid Chokes and Baluns

July 4, 2020July 4, 2020QRZ India

Commonly published information tells us winding a choke or 1:1 balun on a toroid with this special winding technique increases common mode impedance (choking isolation) of an 11-turn balun on a pair of #65 material ferrite cores: The common mode rejection sweep, assuming a 50-ohm common mode source and load is: (pardon the camera jitter) […]

The K7EFX Multiband “3-Half-Wave 6-Meter,” “Half-Wave 17-Meter,” Rotatable Antenna

July 4, 2020July 4, 2020QRZ India

Author: John A. Brackemyre, K7EFX, Stockton, California © June 1, 2010 Design ScopeThe purpose of this build was to replace my 12/6-Meter inverted-vee with a rotatable antenna. Being a Special Effects designer and machinist I had all of the parts so I designed around what was in my collection of tubing, clamps and hardware. Using […]

How High should my Dipole be?

July 4, 2020July 4, 2020QRZ India

Dipole Antennas – the Effect of Height Above Ground I frequently hear the question: how high should my dipole be? Or alternatively, will my dipole work well at this or that height? Unfortunately, these questions can not be answered without first stating what you want the dipole to actually DO, i.e. how you plan to […]

The “Umbrella” A Short Multiband HF Vertical

June 28, 2020June 28, 2020QRZ India

The Umbrella This post describes a simple, easy to make and erect portable vertical antenna for the low bands (160, 80 and 40M). {ed. 80, 40, 20 and 15M were proven at FD 2018} This one is 30 feet high with a unique top hat, utilizing an SG-230 Smartuner and a single elevated radial. It has […]

Ham Radio HF Antenna For Limited Space

May 29, 2020May 29, 2020QRZ India

The ham radio HF antenna, of the half-wave dipole variety, requires a lot of horizontal space. This Page Covers1. “Full Sloper” Dipole 2. Inverted “V” Dipole 3. Inverted “U” Dipole It’s possible, however, to “fit” a full-length half-wave dipole in less horizontal space, while retaining most, if not all the advantages of the “classic dipole” described elsewhere on this site. (See Antenna Section […]

Ham Radio Antenna Options for Home and Portable Operations

May 26, 2020QRZ India

Posted by Sean Kutzko, KX9X on February 21, 2020 at 7:22 pm Most Hams dream of giant towers with large rotatable antenna arrays perched on top. However, many Hams can’t put up such workhorses. Some common issues we run up against are budgets, restrictions on outdoor antennas due to covenants, simple lack of real estate, or the […]

N4KC’s TOP FIVE GET-ON-THE-AIR-QUICKLY ANTENNAS

May 26, 2020May 26, 2020QRZ India

By Don Keith N4KC Copyright 2018 by Don Keith Some of us give up too easily. Or we are too timid to give something new a try. I have seen several examples of this lately. One was a new amateur who got all excited after he upgraded, acquired a perfectly adequate HF station, but then […]

The Old Man and the Magloop

February 1, 2020QRZ India

Created by Stephen Dubin (W3UEC) on 2020-01-06 Introduction: As with many senior citizens, I am morbidly fearful that I may need to move to a care facility, HOA community or other place where it might be difficult to enjoy my ham radio hobby. This has led me to preoccupation with portable antennas in general and […]