resonate frequencies

Slim Jim Antenna - Simple but effective antenna for VHF or UHF frequencies.

The Thick Loop - The performance of a small magnetic loop can be improved constructing it larger, thicker or both. The antenna is covering from 12 Megahertz to 32 megahertz and adding a 156 Pico farads ceramic capacitor it resonates on the 40 meters band. by PY1AHD

Earth Systems - In order to resonate at a particular frequency, an antenna needs to be at least one half wave length long. Antennas below a 1/2 wave are dependent on a ground system for resonance as well.

Efficient Feed for Offset Parabolic Antennas for 2.4 GHz - Possible solutions to the problems of efficiently illuminating SAT TV offset parabolic antennas in the use on WLAN frequencies of 2.4 GHz..

The Considerate Operator's Frequency Guide - A guide to where on the HF bands various modes and activities are generally found. All frequencies are in MHz

Digital Operating Modes - Description, frequencies and sound samples of most popular amateur radio digital modes by DG8FBV

QHtenna - The QHtenna Turnstyle antenna system offers horizontal omni-directional antennas for the Ham frequencies in the VHF/UHF range of 50 Mhz to 432 Mhz. The Crossed Field Antenna" (CFA) by QHtenna offers a small antenna for limited space, maritime mobile, and seasonal DX work.

Efab Antenna Solutions - Antennas for the HF frequencies for portable or emergency field work.

US Communication antennas - UnderBumper diversity licence plate antenna system (front and rear license plates) become the antennas. Available in VHF, UHF, Dual Band and other frequencies. We also manufacture mobile antennas for HF VHF UHF wideband antennas

Meteo Fax and RTTY frequencies - List of freqencies where is possible to listen to teletype RTTY meteo fax transmissions

Digital Modes Frequencies - Digital Communications Modes and Frequencies

Satellite Frequency List - List of satellite frequencies from HT to VHF and UHF

Digital Modes Samples - Audio files of many digital modes. Many were recorded in the HF bands an most others are found on VHF/UHF frequencies.

Using Olivia MFSK - Short description of the olivia mfsk mode and explanation of how to use olivia mode and proper radio setup including recommended olivia frequencies

PSK31 How To Guide - About PSK31, Station Setup, Operation, and Frequencies

AMSAT : Satellite Operating Frequencies - A comprehensive list of Ham Radio satellite frequency usage listed in order of frequency

Sydney, Police Scanner Frequencies - Sydney, Australia Area Police Scanner Frequencies

Australian State related frequencies - Submitted frequencies by visitors

Frequenzdatenbank.de - Frequency database for Germany. Emergency services, aircrafts, radio and paging system with over 2000 frequencies from all over Germany.

Scanner Food - Scanner Frequencies - Tri-Cities Frequencies, Live Scanners, CTCSS information and more

Specialist Antennas - Antenna products and accessories for commercial, industrial, Emergency Service and military applications covering VHF, UHF, TETRA, ISM and GSM frequencies and beyond.

Live Shortwave Radio Schedule - Dynamically generated shortwave radio schedule and world map. Updated hourly. Easy to read and use.

Live Shortwave Radio Schedule - Dynamically generated shortwave radio schedule. Updated hourly, easy to read and use.

Resonant Frequency Calculator - This web based application will compute circuit values required for an L-C circuit to resonate at given frequency. Also it will compute the resonant frequency if given values for L and C.

RF Connectors for upper frequencies - WA1MBA article on RF connectors for microwave