vox circuit

WB2HOL Foxhunting beam - Building the WB2HOL foxhunting beam antenna

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

VU2UKR HAM Radio Station - HAM Radio India Yagi Beam CW QRP SSB QUAD DX circuits sound card Transceiver Morse HF VHF Antenna Satellites Amateur Club Station Operators Licence Exam ASOC Guide Digital Mode Equipment Transmitter Experiments Project schematics Beacon dx HAMSAT VUSAT Satellite Emergency communication Information Homebrew QRP Kits

Advanced Linear Devices - Electronic compoenents manufacturer of precision CMOS analog integrated circuits for OEMs of industrial controls, computers, instrumentation, automotive, and telecom. Transistor mosfet.

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

Mini Circuits - RF / IF Microwave components DC to 20 GHz

Ansoft Designer - Sesign-management environment and circuit simulator for radio frequency (RF) and microwave hardware development

IC-Prog Prototype Programmer - This software package allows you to program all types of serial programmable Integrated Circuits using Windows 95/98/NT/2000/ME/XP

Increasing Amplifier Relay Speed - Article describes a circuit that accelerates the coil of DC relays by momentarily doubling their voltage.

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

VersaBeacon Project - The VersaBeacon is a frequency agile, modulation agile RF source using a DDS chip and minimal support circuitry. It covers a frequency span of 1MHz to 150MHz in 1 Hz steps and provides a variety of modulations

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

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

A simple iambic keyer - Iambic keyer with simple paddles and simple electronic circuit.

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

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

CAT programming interface for ICOM rigs - This simple and cost effective interface circuit is designed for use with any ICOM amateur radio equipment with CIV interface

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.

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

Regenerative circuit - Wikipedia page about regenerative circuits in designing receivers.

A Bipolar Regenerative Receiver - Contrary to what some radio experimenters think, a bipolar regenerative design can be made to work efficiently

The Modern Armstrong Regenerative Receiver - Ramon Vargas Patron articel on regenerative receiver project