rf spectrum

X-Beam antennas - Two element X-Beam is a high-performance broad-band antenna that is ideal for Ham radio operators with limited space. X-Beams are inexpensive and easy to build. The performance of the simple X-beam is amazingly similar to larger, more conventional antennas by 4S7NR

Petlowany Three-Band Burner Antenna - The Petlowany Three-Band Burner is a simple, low-cost, trapless short vertical antenna which amazingly works on three HF bands (20, 15 and 10 meters). This web page contains pictures, performance data, and enough construction details so you can homebrew your own.

Rotatable Dipole for 40m-6m - This article describes a simple, inexpensive, dipole antenna that will rival the performance of a ten-meter beam.

Where Does the Power Go - An Energy Analysis at an Impedance Discontinuity in an RF Transmission Line

The WWVB Receiving Antenna - The construction of this antenna is intended to be inexpensive, fast, and effective. Very capable in receiving WWVB from california.

Corner reflector antenna - Do you need a high gain antenna? Have you suffered on picking up interference from unwanted direction? You need a directional antenna but a 12 element Yagi will be too attractive!

TrapDip - This program let you design and performance of 2-band trapped dipole antennas including trap design.

220 MHZ Spectrum Management Assn - Amateur radio spectrum management and frequency coordination entity for 219

NARCC - Northern Amateur Relay Council of California - The Amateur Radio coordinating organization for the 10 meter band and higher in northern California. In cooperation with the FCC, ARRL, and the support of the hams in northern California, NARCC performs the repeater coordination function for the region.

T.A.S.M.A. - Amateur radio spectrum management and frequency coordination entity for 2-meters in southern california.

Tomco RF Amplifiers - Rf amplifiers for commercial, industrial and scientific applications

Amateur Radio Techniques - RF Filters an adjustable j-pole antenna manufacturer based in greece

Unified Microsystems - W9XT contest card DVK Digital Voice Keyer, morse keyers CW memory keyer, beacon CQ IDer, USB interfaces and more for ham radio operators

Madell Technology Corporation - Makers of oscilloscopes, spectrum analyzers, frequency counters, power supplies and more testi equipment products

Spectran - Cheap hand held Spectrum Analyzer

Trilithic - Broadband instruments, R and microwave components and filters, field analyzers, spectrum analyzers

The RF Shop - Repair HF, VHF and UHF amateur equipment and provide complete repair service for All Audio and .PA Equipment.

RUMLog - RUMlog is a short-wave logging and QSL handling/printing tool for MacOSX RUMlog is available with an interface for transceiver control. Supporting Kenwood, Elecraft and ICOM. (IC-7400/IC746PRO, IC-7000 and IC-706)

Cleverscope - The PC USB mixed signal oscilloscope - Cleverscope PC based oscilloscopes, spectrum analyzers and signal generators

AM6155 / 64 modifications - KF0M's mods for the AM6155 AM6154 RF amplifier

The NVARC Ugly � Filter Project - Project to build sets of band pass transmitting filters for reducing the interference between HF transceivers operated in close proximity

Band-Pass Filters for HF Transceivers - Do your multiple-transmitter field day or contest efforts suffer from intrastation interference ?

Eliminating RFI/EMI - Suggested Steps To Help Eliminate RFI

Sci.Electronics : RFI/EMI Info - Dealing with Computer generated RFI/EMI by Daniel 9V1ZV

TenTec 1208CY 10 .. 50 MHz Transverter - A well-known transverter modified for 10 MHz IF (for Softrock interface use) by DF9CY