HEATKEYS

Resources for amateur scientists, aquarists, and radio and electronic designers

Amateur radio & electromagnetic wave propagation by Serge Stroobandt, ON4AA.

The Coil32 program is coil inductance calculator, that computes: one-layer and multi-layer air core coil inductance, coils on ferrite rings, on the armored core, flat coils on the printed circuit board, and also calculate LC resonance parameters

The American Radio Relay League (ARRL) is the national association for amateur radio, connecting to hams around the U.S. with news, information and resources.

The Department of Electronic Engineering is made up of four research centres: ATI (materials and devices for future electronics and photonics); ICS (academic research group for communications); CVSSP (image, video and audio processing research); and ...

Crystal Radio web site. Crystal radio plans, crystal radio circuits, crystal radio schematics are all right here. Sound powered headphones and how to use them on crystal radios. Crystal Radios, Crystal Set, Crystal Sets, Catswiskers, Science Fair Cry...

A discussion forum for electronics and circuits

Instructables is the Biggest How To and DIY community where people make and share inspiring, entertaining, and useful projects, recipes, and hacks.

TSI Incorporated serves a global market by investigating, identifying and solving measurement problems. As an industry leader in the design and production of precision measurement instruments, TSI partners with research institutions and customers aro...

Electronics Engineering Company specializing in analog, audio, video, RF, digital circuit and printed circuit board (PCB) design.

InTechOpen offers thousands of peer-reviewed free Open Access academic and scholarly articles and research papers. InTechOpen is part of InTech - Open Access Publisher...

Manufacturer of air heaters for process, inline, duct, temperature controller, axial fan, centrifugal blower and OEM applications.