circuit cad

F5NGZ Magnetic loop antenna - Antenne Cadre Project by F5NGZ, description by F5TZA in french

Build an antenna for 23 cm band - Building an omnidirectionnal antenna for the 23 cm band, 1240 - 1270 Mhz

K7UGA Central Arizona DX Association - The Central Arizona DX Association is an ARRL-affiliated club.

Wexaukee Amateur Radio Club - Wexford Missaukee County Ham Radio, Swap Cadillac Michigan

Cheshire County DX ARC - The Cheshire County DX Amateur Radio Club - or CCDX ARC - Has been around for well over a decade. The longest running club ever in this area.

W7EK The Cascade Radio Club - Everett WA

Wire Harness Assemblies - Printed Circuit Board, Custom Overmold Cable Assembly, Box Build, System Integration, Sheet Metal

A D-ATV transmitter project - Build this simple and cheap 70 MHz Exciter and start to transmit Digital Television by Jean-François Fourcadier, F4DAY

IC-746PRO TX Problem - The IC-746PRO is a great rig. But it has a few reliability issues, especially with the earlier-production units. This article addresses four problem areas:. IC151 on the RF Unit. Driver circuit on the PA Unit. HRX-muting circuit on the CTRL Unit. Predriver on the PA Unit.

AP Circuits - Printed circuit board fabrication

Cascade Surplus Electronics - Online catalog for electronic components, parts, surplus, tubes, test equipment and more

5Spice - Analog circuit simulation program for the typical circuit designer. Commercial version for windows

NL5 Circuit Simulator - Analog circuit simulator for Windows (not a SPICE). A great tool for students, amateurs, as well as for experienced engineers. Free Demo.

Enable Low Cost RF Power Amplifiers - A new paradigm for low cost, reliable RF amplifier ‘pallets’ has been enabled by new circuit design, manufacturing and thermal management techniques

Power Aamps RF voltages - This test circuit is easy to duplicate, and demonstrates the extreme voltages that appear in an amplifier when the load is improper for the amount of drive power applied.

Build a Remote Control Antenna Switch - Remote Control Antenna Switch made with two circuits board

A fool-proof VOX - A circuit which had been used in many other application before. The configuration described here is optimized for IPHONE/radio operation.

Nicad Charger for car - A Nicad charger from the car battery by DL6NEE

KI5YN QLF Filter - A microprocessor based interface designed to go between a standard Morse code key and a radio transmitter. The circuit receives a signal from the key, processes it, and re-transmits it to the radio.

QRP AM(cw) Transmitter for 10 meters - In this project, you will make a simple low-power broadcast-type circuit, using a crystal oscillator integrated circuit and an a collector modulated AM oscillator.

Lightning Protection : Protecting each I/O line - KB22UT Article on how protecting ham radio station and in particular I/O Lines such as AC power, coax cable, control circuits, telephone line.

HV power supplies - WV0NNI 2,800 VDC @ 2 Amps Continuous Variac adjusts filament voltage. A voltage doubler circuit, well suited for smaller, compact linear amplifiers.

Preamplifier for 144 mhz - CX2UA 144 mhz preamplifier homemade project in spanish

Sound Card interface - Interface to insulate the radio circuits from the computer by VK2GWK

Using An Oscilloscope - It allows you to take a peek into a circuit to see what is happening has it happens, irrespective of the speed with which it is taking place