circuit cad

KGD - Reduced size antenna - A reduced size antenna made of two series resonant circuits with a radiant tube condenser in German

Orca DX and Contest Club home page - The website of the Orca DX and Contest Club.

HIDARG High desert amateur radio group - High desert amateur radio group, amateur radio operators who live on the Oregon high desert plain that extends from the Cascade Mountains east into Idaho and south to California.

ATV 432 MHz transmitter - ATV 432 MHz AM transmitter schematic

FT-817 DC Circuit Protection - A schematic for a DX circuit protection for the Yaesu FT-817, provides protection from the external power supply overvoltage by DL2LTO in german

AFR Enterprises - AFR Enterprises a leading distributor of electronic components, semicondustors, diodes, Resistors, Integrated Circuits across the USA.

Penny's Stitch n' Print - Pennys stitch n print - arcade ny 585-591-8149, embroidery, screen printing, digital garment print prints and promotional items for enhancing your advertising needs

Friis-It NF for iPhone - Friis-It NF is the first iPhone OS based application that allows you to calculate noise figure, system sensitivity, and cascaded gain for an RF Receiver system

Speech Intelligibility - Articles published by the Radio Society of Great Britain, basic principles, construction of a simple equaliser circuit

Recovering old NICAD and NMHI Cells - Old Nicads batteries and sometimes NMHI batteries usually end up with several cells being short circuit, as they suffer from crystal growth in the electrolyte

NiCad battery charger plan - SV1BSX project for a Nicad battery charger

Semiconductors - Semiconductors, diodes and transistors, intregrated circuits

PCB with kitchen appliances - Cheap and relatively easy way of making professional quality printed circuit boards at home

Circuit Laws - Basic electronic circuit laws

A high perfomance Crowbar Circuit - The MC3423 can protect sensitive circuity from power supply transients or regulator failure when used with an external "Crowbar" SCR.

Low cost frequency counter - Low cost multifunctional seven digit LCD frequency counter, for your HAM radio shack

DRAKE TR7 Downloads - Circuit diagrams drake tr7, Schaltbilder Drake Tr7, antenna tuners, baluns, and home brew power supplies, dual tone ssb test generator, zweiton ssb test generator, zweiton testgenerator, dual tone test generator by DK4DDS

Digital Wattmeter - 300nW to 30W - The digital wattmeter project was created for the purpose of measuring power in the range of 300nw to 30w.

144 MHz Antenna Pre-Ampilfier - Electronic circuit and components layout fot this VHF Preamp

Signal Source for AO40 mode S - Signal source circuit for 2.4 GHz by sv1bsx

TenTec Omni VI AGC modification - Modification leaves nearly all of the existing Omni agc circuitry intact, simply add an audio detector which modifies the delay characteristics of the original system by G3IXQ

DRM Demo Receiver - Christoph Petermann DF9CY DRM demonstration receiver project including Circuit Diagram and component list

Bartling RX-40 Receiver - Circuit Diagram and Construction of the Bartling RX-40 Joachim Münch DF4ZS

30 m Band Direct Conversion Receiver - The direct conversion receiver described consists of only a bandpass filter, mixer IC, VFO and audio filter. With only 22 parts, this simple circuit should take a few hours at the weekend to construct.

UHF on a VHF Rig - This circuit enables fair copy of strong 444 MHz signals, off a local repeater, using a 2m rig and a 1/4λ 70 cm indoor ground plane antenna.