The proper techniques for using an oscilloscope are presented. From basic measurements to more advanced techniques.
http://www.doctronics.co.uk/scope.htm
http://www.mrs.bt.co.uk/dubus/9101-3.pdf
It's easy to tap a phone. Keeping a wiretap secret, now that's the tricky part. That?s where the recording equipment and surveillance teams come in. Learn how government spies and other pros go about listening in.
http://www.howstuffworks.com/wiretapping.htm
Free AutoLISP routine that measures and displays distances in various units.
http://mywebpages.comcast.net/medeziner/
A library containing many hatch patterns for AutoCAD, including stone, wood, roof patterns.
http://www.arbeit.ro/hpat/
WA5VLZ, Neil, shows the tube line-ups and gives a description of each model.
http://www.io.com/~nielw/hro_modl.htm
WA5VLZ provides information about this classic receiver with description, and pictures.
http://www.io.com/~nielw/nat_list/hro600.htm
HQA Design for FLTSATCOM and SPACE SHUTTLE reception hybrid quad reflector array with approx. 6 dBd gain
http://members.aol.com/dj0my/hybrid.htm
Spoke POV for bicycles using 64 LEDs
http://www.ianpaterson.org/projects/spokepov20050704/index.htm
http://www.mrs.bt.co.uk/dubus/8301-3.pdf