drm frequencies

Antenna Impedance measurement - When experimenting on an antenna it's often important to determine its feedpoint impedance at various frequencies across the operating band. It's easy enough to measure SWR, but sometimes we need to know more detail than this

Log Periodic Antenna Design  ^pop - calculates the dimensions and spacings of the elements needed to build a log periodic antenna, given tao, sigma and the lower and upper cutoff frequencies.

Advanced active VLF Loop - Article on using loop antenna in very low frequencies

Magnetic antenna fo ULF - Detection and recording of Schumann resonances and other electromagnetic phenomena at frequencies below 50 Hz By Hans Michlmayr

ACTIVE Beacons <30 Mhz - List of all ACTIVE Amateur Radio Beacons on frequencies below 30 Mhz.

Myers Engineering - Broadband mobile radio antennas, vhf uhf antennas, commercial radios and scanners, rf coax cables and connectors

PSK31 Frequencies - HF VHF UHF PSK31 proposed frequencies

BandPlans.com - Have you ever wondered where different modes should be operated, what frequencies to avoid as a courtesy like SSTV etc? This site offer a database for known net frequencies,known segments for different modes, known beacons

JT65 HF JT65A HF Frequency Information - JT65A frequencies. List of common HF frequencies where you can work JT65A.

6-Meter Ham Frequencies - Alan Muir, VE7BEU, on behalf of the Westcoast Amateur Radio Association,(Victoria) is assembling and submitting the 6-meter Repeater pairs in use to the BC Amateur Radio Coordination Council.

Repeater operating procedure - Guidelines on operating on ham radio repeaters frequencies

VHF/UHF Propagation - In the past few years there has been a growing movement from VHF frequencies (50-300 MHz) to UHF (300-900 MHz). Many, however, have found the move fraught with difficulties.

FT-897 mods - FC-30 Fan modification, Mars/Cap mod for Yaesu FT-897, DRM modification for Yaesu FT-897, FT-897 mod for SGC-230 DC power

NSW Emergency Service Scanning - Scanning information (frequencies and talkgroups) of the emergency services in NSW, such as the NSW Police Force, NSW Fire Brigades, NSW Rural Fire Service, NSW State Emergency Service and Ambulance Service of NSW.

Sydney Scan - Frequencies for radio scanning enthusiasts from anywhere around Sydney, Australia

Graham's scanner frequencies - Grahams Goldcoast Australia Radio Scanner Frequencies

Bergenscanner.com - Radio frequencies for Bergen County located in Northern New Jersey

TSC Ferrite International - TSC International is a manufacturer of magnetic materials for all frequencies

RF Filters - MS DOS Program for calculations of HP, LP and BP filters at VHF and UHF frequencies up to about 800 MHz by YU1AW

ILGdb - Free program that interfaces most ICOM radios with the ILG radio frequencies database and lets you click a station in the database to tune your radio to the station, or scan the list looking for stations that are on the air.

FREQ DB Icom - Program that interfaces with a text file of frequencies plus other data and tunes your ICOM radio. You create this data yourself, and can use almost any data you wish. You use the program by clicking a station in the file to tune your radio to the station or net, or scan the list looking for nets that are on the air.

Radio Control Program ARCP-480 - This free software is an application solely for the use of controlling the Kenwood TS-480. Can be used to edit, save, and export to the TS-480 information such as Memory, Menu, and Auto Mode frequencies.

RadioComm  ^pop - RadioComm can be used to program your Icom radio's memory, or to create nice radio-frequency spectra (see above) or to interface your radio to a huge database of frequencies.

Using RG-174 Coaxial Cable - Notes on using RG-174 Coaxial Cable at Medium and Lower HF Frequencies by John Bryant and Bill Bowers

Inductor Design Software - RF toroid - A free too designed to assist in the selection of iron and alloy powder cores. RF toroid calculate the location of the Self resonate frequencies for series and shunt inductors.