three phase emi filter

2 Stack Match Yagi Antenna - Solves antenna matching problem with two phased antennas. Stacked rotary beams are popular. However, connecting two 50 Ohm antennas together presents some problems.

HF/VHF Portable Mini Tuner - A small portable antenna tuner for HF and VHF bands by ON6MU

7 band semi-vertical antenna project - Don't buy or build a semi-vertical trap antenna until you read this article! If you can use a drill, saw and screwdriver this is a simple project.

LOTW users online DX cluster - DX Cluster filtered with only Log of The World users

WA3FKG Amateur Radio Scanner & Linux - My place in cyberspace for thinking out loud about the Three Rivers Area Montioring Association

ARI Ham Radio Insurance - Italy - Assicurazione per Radioamatori by ARI available to its members

HI-Z Antennas - HF receiving systems and components, band pass filters, array controllers, HI-Z pre amplifiers

Kathrein Inc - Manufacturer of professional antenna and filter systems for communications and broadcasting, serving commercial and governmental markets worldwide.

MegaPhase - MegaPhase designs, manufactures and sells coaxial cable assemblies to OEMs building advanced microwave and optical electronic systems, products include test cables, test adapters, flexible and semi-rigid cables used to connect system components inside a system, and coaxial connectors.

Anaren - Manufacturer for splitter and combiners, baluns, directional couplers hybrid couplers, modulators, mixers, phase discriminators, antenna feeds.

Hittite Microwave Corporation - Amplifiers, filters, attenuators, mixers, PLL, switches and frequency dividers, signal generators, power detectors, transimpedance amplifiers, variable gain amplifiers and more

Martek Power - Martek Power designs and manufactures a wide of high performance power supplies for various industries. Power supplies AC-DC, DC-AC inverters, DC-DC, EMI Filters

Gagacom - Amateur radio accessories dealer based in Wehrheim Germany, offer Antennas, baluns, filters, antenna tuners, dummy loads, swr wattmeters by Palstar

ICM Components - ICM Components is a company supplying Semiconductor & Passive Components, stocking most surface mount packages in I.C & Capacitors.

Jaycar Electronics - Jaycar electronics offers electronic kits, components, semiconductors, enclosures, batteries, PMR, transceivers, UHF CB Antennas

IDSP - IDSP is an app for IPHONE and IPOD Touch. Made by 2 powerful filters, a band pass and a band stop with adjustable bandwidth. Filters are butterworth 4 and 8 poles, sample rate at 44,100 32 bit. Cancel every noise and hear only your qso.

AktivFilter - Active filter design software for windows, AktivFilter 3 for the design of active filters tuned on the opamp type.

Datasheet catalog - DatasheetCatalog.com is free an online datasheet source for electronic components and semiconductors from ST Sanyo KEC SONY Toshiba Motorola Texas Instruments, Panasonic, Microsemi, Maxim, Rohm, Fairchild, National Semiconductors and others

DataSheetLocator - Datasheet Locator is a free tool that enables you to locate product datasheets from hundreds of electronic component and semiconductors manufacturers

Semiconductor Datasheets on the Web - A list of links to semiconductor manufacturers, including direct links to their datasheets index page

Passive CW headphone filter - This filter is a plug in adapter that has no batteries but gives very good performance by G8MNY

1.5KW 6m Low Pass Filter - This filter is designed to follow a FULL legal limit, GS-35B, 6m linear amplifier. Designed and built by Bill Jones, K8CU

The Rock-Mite CW Kit - The Rock-Mite is a 40m CW kit offered by Small Wonder Labs . It features built-in keyer, direct conversion receiver with a crystal RF bandpass filter, 500 milliwatts of power, and switchable frequency offsets to work around QRM

Inrad Roofing Filter in the Yaesu FT-920 - Insalling Inrad roofing filter in the FT-920 with pictures and comments

Regenerodyne Receiver - A three tube regenerodyne receiver by Gary Johanson, WD4NKA