three phase emi filter

The HF Satellite Antenna for 10 and 15 meters - Here is an antenna for the nineties. It's strong, computer designed, and has lots of gain. It is a full size, four element beam on 10, and three elements on 15 meters

Phased 40M Wire Verticals - Experiments with phased wire vertical antennas on 40 meters at VA7ST

Short Tri-Band Vee Dipole - A three band short Vee antenna is feasible with two legs per side on a dipole. 10-15-20 meters by W8HDU

K5MDX Magnolia DX Association - Mississippi's Premiere DX Organization

ARVN Amateur Radio Video News - Documentary and seminar videos for and about Amateur Radio, on DVD and online. Some make excellent club meeting programs.

I0JXX - The I0JXX is an italian company that offers market their projects, also sells electronic products of high quality, both for Ham, both Broadcast and their accessories. VHF Antennas, mosfet power amplifiers, filters, insulators, power dividers, telescopic poles, antenna masts

PAR Electronics Inc. - Filters for the commercial 2 way market, MATV, FM broadcast, laboratory, marine industry, amateur radio, scanner and short wave. Antenna for amateur radio bands

Response Microwave, Inc. - Microwave Signal Processing Components and Subsystems, from design to manufacturing.

NorComm Data Signaling - Sequential Decoders, DTMF, voice encryption, notch filters and band pass filters, single tone burst decoders.

PhaseFree, Inc. Surge Suppression - PhaseFree, Inc. Surge Suppression. Provide customers with the safest and highest quality surge suppression on the market. Providing surge suppression for the Navy's MARS stations protecting their investment.

MFSK16 - An MFSKMulti-Frequency Shift keying DX Mode. A new weak signal DX mode for Radio Amateurs, employing M-ary FSK, phase continous tones and convolutional coded FEC.

IC7000BKT Icom IC-7000 CAT Control - CAT Control specific for Icom IC-7000 allows managing filters and all the commands of the RTX. Includes a function to synchronize and manage all the memories of the IC-7000.

Yaesu FT-950 Operating Manual - Yaesu FT-950 manual

GAP Titan DX SWR Measurements - Gap Titan DX Antenna SWR Tests GAP Titan DX Antenna SWR Test

Jameco - Jameco carries over 50,000 semiconductors, passives, interconnects, electromechanical, power supplies, LEDs and other popular electronic component

DSPRX - Signalprocessing for SSB - Direct Conversion Receiver using Phasemethod for Sideband Supression, does all necessary signalprocessing for Direct conversion Receivers using IQ-mixer for demodulation.

Double Tone IQ-Generator - Easy to use double tone IQ-generator for testing direct conversion SSB-transmitters based on phasemethod etc.

Low Pass Audio Filter - 440 Hertz peaked low pass audio filter experiments

Resonant Frequency Calculator - This web based application will compute circuit values required for an L-C circuit to resonate at given frequency. Also it will compute the resonant frequency if given values for L and C.

Coaxial Stub Filters - A range of easy-to-build RFI filters by John Regnault, G4SWX

Low-Pass Active Filter Designer - Javascript filter design page with introduction to low pass filters by k7mem

High-Pass Filter Design - Online high pass filter design page with introduction to high-pass filters by K7MEM

Bandpass and I.F. Filters - On this page a popcorn highpass filter, some inductors and their Q , double tuned bandpass filters and simple Cohn Crystal ladder IF filters are presented.

M3 Electronix Semiconductor Analyzer Kit - A workbench instrument capable of testing transistors, diodes, FETs, usefull constructing QRP circuitry.

General Coverage Receiver - This is a compact three transistor regenerative general coverage receiver with fixed feedback