oscillator coil

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

Easy wire antenna for 40-20-10 meters - PE3HMP project of a triband wire antenna for 40 20 10 meters band, made using home made coils

Coil loaded dipole for 80 meters - Coil loading of an 80m Dipole for restricted space. Here's a method that may allow you to fit that 80m dipole into your suburban backyard by VK3JEG

PY1UNU dipole for 80 meters - A dipole with coils for 80 meters band in portuguese.

Coil calculator - On-line single-layer coil designer

Antenna Loading Coil Construction Techniques - This page explains how to construct high-Q inductor coils.

Build Your Own Coils - A method of building coils for your home made antennas

Home Brew Loading Coil for AD5X Vertical - How to make a loading coil for the AD5X portable vertical antenna

Building Coils - Building coils for a portable dipole using a novel method of winding coils with weedeater cord! By K4MMG

Inverted V - Described is a simple inverted-V antenna which, when used with a balanced ATU, can be used on all the main Radio Amateur HF bands (80, 40, 20, 15 and 10m). The cental support is made in such a way that the wire can be coiled up for storage when the antenna is taken down.

Easy tuning an building of traps  ^updated - A new and simple method for tuning traps. You need 2-3Watt of your TRX and two homemade coupling coils by DK7ZB

QRP Antenna 80-40-20-15 End Fed Antenna - A long wire antenna that will load up on 80, 40, 20 & 15 meters without an antenna tuner and without balun coils

Base Loaded 160M Half-Sloper Antenna - K0EMT 160 meters sloper antenna

CoaxTrap - This program let you design of antenna trap using length of coaxial line wound as solenoid on a coil former.

Single Coil Z Match - The simple Z match tuner simplified, article by Lloyd Butler VK5BR

Pierce Aluminum - Distributor of aluminum and a manufacturer of finished aluminum products. Pierce Aluminum offers a diverse inventory and distributes a complete line of sheets, coils, plates, bars, structural shapes, tubes, pipes and extrusions in the most varied alloys and sizes possible

Filtronetics Inc - Maker of filters, oscillators, cristals Coils, Toroidal Inductions, Solenoids, Bifilar wound Solenoids, Trifilar Solenoids and Transformers Located in Kansas City, Missouri

TRAK Microwave Corporation - Signal generatos, oscillators, direct and indirect synthesizers, exciters custom oscillators

A Guide to Test Equipment - That just about sums up many peoples’ attitude towards test equipment. Multimeter, SWR/Power Meter, Dip Oscillator, RF Signal Generator, Cathode Ray Oscilloscope

Phase Noise. - This is perhaps the most important parameter in many oscillators and it deserves an in-depth discussion on what it is, how it affects a system and how it can be minimised in an oscillator design.

RF Circuit design basics - Ebook by Akira Matsuzawa Tokyo Institute of Technology, Building blocks in RF system and basic performances, Device characteristics in RF application , Low noise amplifier design, Mixer design and Oscillator design

SweepGen - SweepGen turns a PC into an Audio Oscillator and Sweep Generator which can be used for testing audio or educational purposes. In conjunction with audio test instruments, you can make frequency response plots. SweepGen uses the sound card in your PC to produce sinewaves

Tone Sound Frequency Sweep Generator - Generating of up to eight independent oscillatory processes per each channel with separate frequency, initial phase and amplitude controls.

Coil Inductance Calculator - Calculate the inductance of a single-layer, air-core coil.

Accurate Inductance Calculator - This page allows you to calculate in the most accurate way high-Q inductor coils.