Radio Electronics Projects – Hans Summers G0UPL

“I am not a professional electronics engineer, nor do I have an electronics degree. I make no claims for technical accuracy, good design, or necessarily even originality for the contents of these pages. Rather, I am a simple enthusiast attempting to convey my love and enjoyment of radio, electronics, laptops and computing and perhaps to inspire YOU to build something too.”‘

Radio Electronics Projects – Hans Summers G0UPL

This ultra-low power QRSS beacon was designed to be as efficient as possible, and produce a milliwatt or few from low voltage, low current supply. My intention was to investigate the use of natural power sources to operate the beacon.

Low power QRSS beacon – Hans Summers G0UPL

Steve G0XAR visited the G0UPL shack and took some photos of proceedings. Combined with a sneakily obtained photo of G0UPL sleeping somewhere in Texas en-route to Ozarkcon 2007, G0XAR produced this very nice QSL card suggestion!

Datasheets – Written by Hans Summers

A number of these parts are obsolete, and several more will probably become obsolete very soon.The manufacturers listed here are not necessarily the ones whose IC’s used, but in all cases chips from a different manufacturer should be interchangeable. In general 74nn chips and 74LSnn chips can also be interchanged,  Many IC’s are made by multiple manufacturers, and there have been many rounds of mergers, aquisitions and consolidations in the semiconductor industry.