rf toroid

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

Hex Beam by K4KIO - This site provides guidelines to build a G3TXQ broad band hex beam RF antenna for the 5 ham radio bands, 20, 17, 15, 12 and 10 meters. The G3TXQ hex beam is a new development and actually easier to build than the classic hexbeam.

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.

SV - Greece - Radio shack rental in greece by Jürgen Eisinga - DL2YAG - SV0IE

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.

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

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

TANT 136 - DOS program for calculating the performance of a T antenna. Gives loading coil info and matching plus ERP by Reg G4FGQ

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

Mini Ring Core Calculator - The easy way to calculate toroid cores.

Online Calculators for Radio & Electronic Design - Online calculators for toroid coil, air-core coil inductance, XL, XC, and more.

Toroid Winding Calculator  ^updated - Choose Iron Powder or Ferrite and calculate required turns

Toroid cross reference - Construction articles in magazines and books often use part numbers of firms no longer in business or whose parts are hard to find. Here you can locate the palomar toroids equivalent

LA6PB's split dipole - A new method of feeding a dipole with toroids.

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

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