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Petlowany Antennas by K6NO - WorldRadio Article on Petlowany antennas base on this principle: if a length of wire is wound into a spiral-shaped coil and excited by a radio frequency current connected to the innermost portion of the coil, it will then, and only then, exhibit RF characteristics that closely approximate those of a resonant linear wire of the same length

The flower pot antenna - A portable dual-band antenna working principally on 10 meters but also close to the 30 meter band. It�s compact, light, economical and doesn�t need any radial.

Trapped dipole for 80 and 40 m - This article explores a theoretical model for the losses of an 80m / 40m trapped inverted V dipole antenna system using a bootstrap coax trap, but does not examine the pattern of the antenna.

Practical Guanella 1:1 balun - This article proposes a lossy transmission line model of a practical Guanella 1:1 balun that is effective for all frequencies within and immediately adjacent to the pass band

Homebrewing: A Lost Art - A Packeteers guide to homebrewing

Los Angeles County Disaster Communications Service - Here you will be able to access all of the information regarding our amateur radio disaster relief communications organization, its divisions and volunteer members

SV7LNK - SV7LOS - Hellenic Radio Amateur Station CQZ 20 ITUZ 28 KN11SC

Blossomland Amateur Radio Association - Located in Southwest Michigan, in Berrien County

Cameljoe's Police Scanners - Collection of links to listen to police, fire and airport scanners online.

GlobalTuners - GlobalTuners provides access to remotely controlled radio receivers over the internet. You can listen to ham radio, shortwave radio, air traffic control, airband, ACARS, airports and much more. Tune remotely controlled receivers from all over the world with your browser and listen live.

Teel Plastics - Plastic tubing and custom plastic tubing from a manufacturer that specializes in the custom manufacturing of close tolerance plastic tubing products.

Elenco Electronics - Test equipment maker, digital oscilloscopes, generators and counters, multimeters, logic probes testers and more

Madell Technology Corporation - Makers of oscilloscopes, spectrum analyzers, frequency counters, power supplies and more testi equipment products

Victor Electronics - Accredited oscilloscope manufacturer for over 20 years produce digital oscilloscope, multimeters, frequency counters

BK Precision - Power supplies, electrical testers, battery analyzers, cable tester, rf generators, spectrum analyzers, Digital/Analog Oscilloscopes, Multimeters , attenuators, frequency counter

TLDetails - Transmission Line Details. This utility program shows the impedance and SWR at both ends of a transmission line and the details of power loss in the line. It includes characteristics for over 40 built-in line types. You can modify these values to see how small changes affect the results or to specify custom lines. All program inputs may be changed directly or you can use spin buttons to make the changes. If you are using a moderately fast computer you can hold down a spinner and "watch the movie" on the charts as the results are recomputed. By AC6LA

Cleverscope - The PC USB mixed signal oscilloscope - Cleverscope PC based oscilloscopes, spectrum analyzers and signal generators

BIP Electronics Lab Oscilloscope - Freeware windows oscilloscope uses the sound card's input to measure signals. This means that the quality of the scope depends on the quality of your sound card. The scope automatically uses the highest sample frequency available at the input that you select

ScopePar - ScopePar turns your old PC into a multi-channel oscilloscope, the user-interface to which is SeriCon on Windows PC.

SPLAT! for Windows - This free software is useful for visualizing terrain and performing Longley-Rice path loss and coverage prediction using the Irregular Terrain Model. A Windows port of the Linux-based SPLAT by John Magliacane.

The NVARC Ugly � Filter Project - Project to build sets of band pass transmitting filters for reducing the interference between HF transceivers operated in close proximity

Clean Up Your Signals with Band-Pass Filters part 2 - Part 2�You�re now much closer to saying goodbye to your unwanted signal problems!

Oscilloscopes - basic use and measurements - A 12 pages pdf article about oscilloscope use, calibrating, operator controls and tips on making measurements by NA5N

The Oscilloscope - What is an oscilloscope, what can you do with it, and how does it work? This section answers these fundamental questions.

How oscilloscopes work - A guide to learn how oscilloscopes work