emi filter

Pi-filter ATU for Beams and Verticals - A ATU for beam and vertical antennas by PA0FRI

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.

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

I2YSB DX Peditions Videos - Ham radio DX pedition videos by I2YSB

CWS Coil Winding Specialist - Manufacturer of transformers, inductors coils and chokes. Custom winding, EMI / RFI Filters, Antenna Windings on ferrite rod, Antenna Winding on phenolic. Any antenna coil designs.

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.

Taiyo Yuden - Ceramic capacitors, inductor ferrite products, high frequency dielectric components like chip antenna and filters.

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

Yaesu FT-1000D improvements - Filtering, modifications and improvements of the Yaesu FT-1000D

Yaesu FT-1000 Sub RX Filter - Filtering of the Sub RX of the Yaesu FT-1000(D)

AussieScanners.com - For all your Radio and Scanning information in and around Australia. Online feeds, various links, heaps of information. Come and join Australia's Premier Radio Scanninf Forum

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

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

Receiver Band-Pass Filters - Third-order Cauer filters can boost performance of multi-transmitter, multi-operator contest stations to the next level. The filters are practical and you don’t need expensive test equipment to align them.

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

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

Kenwood-to-PC Serial Interface - A circuit that connects an IBM® compatible personal computer, running TR Log or CT (etc.) contest logging software, and Kenwood transceivers equipped with serial control ports. CW keying is also provided in this RFI filtered interface unit.

Kenwood TH-215 TH-415 mods - Unfilter LF output from the TH215/415 kenwood portable radio