air frequency

Feeding the Beast - Transferring Radio Frequency Energy from Your Transmitter to Your Antenna by Don Keith N4KC

Tom's Antique Radio Repair - Specializing in antique, vintage and tube radio repair, all makes. Transistor radio repair- from the 50's to the present. Free estimates.

Antique shop - Puerto Rico's house of radio services and sales - San Juan, Puerto Rico First site dedicated to repair sales and restoration of antique radios and phonographs

W9DC IOTA Awards - W9DC North America Amateur Radio checkpoint for IOTA Islands on the Air and WLH World Lighthouse award applications and award instructions; Island and lighthouse award links for international radio operator activities

DK0TUI/DL5MO: IOTA - Islands on the Air - Many IOTA informations

ITU: Frequency Allocations - Table of frequency allocations for Amateur and Amateur Satellite Service

Remote-Controlled HF Operations - If you can’t get on the air from home, the Internet may provide the answer. By Brad Wyatt, K6WR. Pdf File.

SWL Audio Clips - mp3 files to download produced by an italian SWL. Includes, broadcast stations, air traffic controls, pirate radios

Star Antenna - Communication Electronic designs, manufactures and markets antennas for fixed wireless and mobile wireless applications in a wide range of frequency bands.

Really Low Frequency Operating - The world below 500 kHz (The wavelength is 1500 meters or just about a mile) has a number of interesting listening and communications opportunities with possibly more to come.

Icom IC-706 Radio mods db  ^pop - Info and mods for IC-706, IC-706 Expanded frequency IC706 - spare 0.3A, MARS/CAP Modification for ICOM IC-706, enables out-of-band transmit for 1.6 MHz to 54 MHz, ore sensitive transmit for 2 meter IC-706 60 MHz to 200 MHz band pass filter, Icom IC-706 Extended RX mod, ICOM 706 MKII Extended transmit mod, Special on IC706mkII TX range expansion for IC-706MKIIG, Expand only mod for the IC-706MkII

Frequency files for VX-150 - Frequency files and software for programmable scanners fro VX-150 and VX-2 yaesu radios

Modifications for the Yaesu VX-5R - VX-5R Loose antenna cure, Vx-5r Free Band, VX 5 R modification for German, VX-5R expanded frequency mod, VX-5R MARS/CAP & freeband mod

ICOM IC-2100H Frequency expansion - Modification to IC-2100H

Fox Delta Amateur Radio Projects & Kits by VU2FD - Amateur Radio Projects & Kits for homebrewers, includes DDS,sound card interface,programmers, hamcom, frequency counter, RF Power Meter, modems and more.

N4ATS.com - N4ATS - Devoted to the Yaesu FL-7000 Amplifier. I have been rebuilding, repairing, and applying modifications to the Yaesu FL-7000 amplifier for 15 years. Over 200 units completed and counting!

Airband - Airband Online, Airband Scanners, Communications Monitoring, Shortwave and WorldSpace Radio Suppliers.

Advanced Communications - Refurbished used test equipment, rfand power amplifier repair, two way radios sales and service

LandAirCom - Repair for all brands of equipment; authorized or recommended for most major brands, Richmond Hill, New York

APRS-Beacon - The purpose of the APRS-Beacon is to provide simple APRS-compatible position beacons for up to three Objects. It is designed to 'stand alone' and does not monitor other traffic on the frequency. It can use a single-port TNC (in 'native' mode), a single- or dual-port TNC in Kiss mode or the AGW Packet Engine in order to transmit on up to four radio ports.(When running with AGWPE, APRS-Beacon will also work with Windows 2000)

Baudline signal analyzer - A Linux based FFT spectrum analyzer designed for time-frequency browsing and scientific data visualization. Oscilloscope waveform, statistical histogram, accumulated spectral trace,Weak Signal reception, continuos data logging, FFT Analyzer and specialized measurement windows.

LCF Calculator - LCF online Calculator, calculate relation between Frequency Capacitance Inductance and Reactance

Precision Frequency Enthusiasts - Frequency measurement for beginners, technical terms related to frequency measurement and accuracy, techniques and calibrating procedures.

Build a logging frequency counter - Pictures, photos, source code and plans to build a logging frequency counter

Are you ready for BPL - Broadband over power lines (BPL) is a technique for transmission of high speed data (broadband Internet) over powerlines. Access BPL technology injects radio frequency energy into powerlines which were not designed for transmission of radio frequency energy, and leak substantial energy that causes interference to radiocommunications service