micro circuits

K9AY terminated loops for 75m - It is very compact, low noise and directive with an impressive 20 to 25 dB front to back

Horizontal Loop for 80 meters - Modelling an horizontal Loop antenna at 3.5 MHz

Folded dipole ZL Antennas - Simulation and modelling the ZL Special antenna

Jpole antenna Modeling - Using NEC4WIN for Jpole antenna modeling

Z-Match Antenna Tuner project - This Z-Match is a link coupled all-band tuner. Two all band tank circuits cover 3-14mhz and 14-30mhz. The tank output links are selected with a very heavy duty SPDT rotary switch.

Top Loaded vertical antennas - Simulation of a top loaded vertical antenna for 1.2 MHz

V63XG Micronesia - V63XG will be on the air from 4th December 2012

Variacs - Variable Autotransformer - Use these Variac auto transformers for specific application requirements that include, but are not limited to, home coffee roasting, tube amps, and more.

Shortwave Daddy - The Shortwave Daddy is an easy to assemble PC based and USB powered AM/FM/Shortwave radio kit with many features that will delight both DX shortwave enthusiasts and experimenters seeking to learn more about microprocessor controlled radios.

IC7000 HM151 Microphone Audio Mod - Modify IC 7000 handheld microphone HM 151

Microsat - Ham radio shop for APRS digipeaters WX3in1, RPTC, GSM devices, SDR software defined radio producrsa, APRS trackers and GPS Receivers based in Poland

CubiCom - Italian ham radio dealer for MFJ MicroHam Acom RigExpert and Mastrant

Maes Electronics - Telecomunications import export, ham radio dealer based in Belgium for MicroHam, MFJ, LDG, ICOM Yaesu and other ham radio brands

DroidNavtex - DroidNavtex is able to decode NAVTEX messages from your receiver through the Android phone or tablets microphone or through a connected interface.

Beacons app for Windows - Shows which beacon is currently transmitting on the selected radio band Displays information about transmitting beacon Informs about direction and bearing from users position towards transmitting beacon

RF Calculators - A collection of calculators from everything RF for various applications VSWR, attenuator resistance valies, microstrip, coax, unit conversions and many more.

Microphone sensivity calculators - Mic online calculator , Microphone Dynamic Range Calculator, Microphone Sensitivity Calculator

PIC-Keyer - This project describes the construction of a real CW QRP keyer with a small microcontrolle

Electro Voice 664 Wiring - Electro-Voice Model 664 (EV 664) cardioid microphone, wiring diagram, pictures and data sheet

Amateur Radio - Microphone Preamp - Low signal, noise-high AC gain preamplifier

Microwave Marker - Signal marker for the microwave bands

Build a Test Meter - This article include a circuit that allows a cheap 0-1mA meter to be used as a micro-ammeter or a milli-voltmeter

Make your own multimeter - Homebrew a multimeter with this article

RF Probe for HF - A RF Probe circuit for the RADIO frequency experimenter to check the presence of a RF signal and also to measure its strength

RF Probs and Watt meter - This RF probe can be used at High Frequency (HF) or Ultra High Frequency (UHF) on both 50 and 75 ohm coaxial cables.