trunk frequencies

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

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

Balcony and pedestrian mobile motor tuned loop - This antenna was designed to meet the requirements of a light body worn small magnetic loop covering all the frequencies continuously from 7 MHz to 29.4 MHz

OH Beacons - List of OH beacons running on HF VHF and higher frequencies

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.

Hellschreiber frequencies - Suggested frequencies for HELLSCHREIBER operation by the feldhell club

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

Radiosonde : how to listen to them - Frequencies and location of every meteo radiosonde launching centres in Europe. Equipments, antennas, history, SondeMonitor and BalloonTrack tutorials

Olivia, the Magic Digital Mode - Olivia MFSK digital communications are becoming popular in amateur radio because Olivia is one of the most robust methods of text keyboarding, that can perform superbly for long distance communications. Olivia frequencies, format and software

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

Top 1000 SWL HF Frequencies - W4LGH collection of top frequencies to listen oh HF bands

Daraz Frequencies - Australian scanning frequencies

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

Sydney Trunk-Scanning - Information on scanning commercial trunk networks in the greater Sydney metro area.

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.

Santa Barbara Scanner Frequencies - Frequency allocation in Santa Barbara California

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.

Filtroid - Filtroid is an extremely easy-to-use program for synthesizing microwave filters. It can be used to design practically all filter types from audio to microwave frequencies as well as amplitude and delay equalizers and attenuators.

Interdigital bandpass filter designer - Fill out the form to design a bandpass filter as described in the January 1985 issue of Ham Radio Magazine. These filters are generally limited to frequencies above 200 MHZ because their size is slightly longer than 1/4 wavelength