RF & microwave site with free GPIB test toolkits and TimeLab stability software.
Electronics forum forum
Learning guides
Manuals, Timing, Ham Radio, Test Equipment
Daily DIY hardware
Alan Wolke, a highly regarded electrical engineer, mentor, and content creator.
Prominent British ham radio operator known for his extensive technical contributions, antenna designs 6m
Prolific homebrewer specializing in minimalist, QRP radio designs, and simple RF test gear.
Massive collection of test equipment repair logs, calibration notes, and deep dives into vintage metrology.
Computational engine capable of handling standard, highly advanced, and obscure historical unit systems .
One of the most heavily used, conversion portals across the globe with live utility tracking.
A high-utility, web-based tool optimized for engineers who require strict mathematical consistency.
A technical translation toolkit built for industrial engineering and physics applications.
Offers massive historical collections containing millions of photos, maps, manuscripts, and audio/video records.
A primary gateway for European cultural heritage. Over 50 million digitized artworks, books.
Official government archive for the United States, billions of electronic records.
HP 200/300 Series Software Section images of Rocky Mountain BASIC systems, original utilities.
HP 9845 workstation family. LIF filing system. Source for HPDrive, HPDir and other useful software tools.
Scanned manuals covering HP 9000 series 300 hardware and software.
Operating-systems, firmware and applications software for HP 9000 computers.
Engineering & Projects 
Hidden-Gem Utilities 
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