rf toroid

Multiband Cubical Quads - EI7BA Multiband Cubical Quads projects, includes two elements quad antennas for 10 12 15 17 20 meters band. Performance considerations, detailed pictures and construction notes.

Assembly of the Lightningbolt Quad - One of the best antenna values on the market is the LightningBolt Quad. At about half the cost of a tri-band yagi, you get five band coverage with a single coax feedline and excellent performance from a light, low wind load antenna.

A Collection of Smith Chart Resources - The Smith Chart was originally created many years ago as an RF engineering aid by Phillip Smith of RCA.These pages includes extesnive documentation on smith carts.

DF2PI - Amateurfunk - QRP and photos ham blog de DF2PI

DL6YDY QTH germany - hobby amateurfunk - Ham Radio blog made by NormCast alias DL6YDY

DK8EY - Amateurfunk bei DK8EY, Chris aus Mettmann im Neandertal.

DG2MAS Podcast blog - Funkamateur.org feat. amateurfunk podcast

DL6DBN - Ein satellit entsteht und andere amateurfunkaktivitäten...

DG2DRA blog - Amateurfunk in der oberlausitz

DG7ABL.de - Amateurfunk, linux and computing

DK2AB Core blog - Amateurfunk blog

KB3KAI David stansbury - David stansbury kb3kai, amateur radio site with live harford county weather feeds, ham technical info, blog and more

Electronika Int. - Electronika manufacturers Coaxial Cable Assembly, RF Connectors, Adapters, Power Dividers, Couplers, Crimping Tools

SAT-Service Schneider - Digital radio mondiale DRM products, measuring tools, Magnetic field probes, RF power meters, Broadband loop antennas, DRM devices and services

National RF, Inc. - National rf provides consulting engineer services, and manufactures direction finding antennas, test equipment, communications receiving equipment and adjuncts, satellite antennas, voice amplification and audio equipment.

Ramsey Electronics - Large selection of affordable and fun hobby kits as well as a really neat selection of electronic gear. Transmitters and receivers kits, test equipments, RF test enclosures.

Alpha Linear Amplifiers  ^pop - RF Concepts manufacturer of Alpha Linear Amplifiers, amateur radio RF power amplifiers, commercial power amplifiers, power meters and dummy loads.

Reimesch - Ham radio dealer based in germany offer RF power amplifiers, from Alpin and SPE, antennas, RFI suppression products and GSM GPRS products

RadioLabs - Radio, Wireless and Beyond - Specialize in engineering, design and repair of all rf equipment. Dealer for two way radios, scanners, shortwave radios, wi-fi antennas, wifi amplifiers. Based in Fortuna, California.

Adaptive Home Logic - Monitor / Control your home with APRS short text messages. Featuring Scheduling / Conditional Events, 2-way Speech, E-mail, file data, serial data, digital I/O, Sunrise/Sunset, natural language interface, interactive screen overlay scenes, logging + More

RS232 interface for Kenwood rigs - SS232K - The simple and safe RS232 interface for Kenwood radios

QRP 12V Power Pack - A perfect companion for your Elecraft K1 or any other (not power hungry...) QRP rig

VK5BR : Intermodulation - Intermodulation Performance and Measurement of Intermodulation Components by Lloyd Butler VK5BR First published in "Amateur Radio" August 1997

FT8x7 OptoCAT - The safe RS232 CAT interface and PA buffer for Yaesu FT-817, FT-857, FT897 and FT-100 rigs

K2 OptoCAT - The safe RS232 CAT interface and PA buffer for Elecraft K2