http://www.techlib.com/electronics/telephone.html
prevent overcharging and electrolyte loss by stopping charging when the cells warm up.
http://www.solorb.com/elect/tmpchrg/index.html
Performs excellently. Compact in size it gives great signal gain, wide frequency coverage, and exceptionally low noise characteristics
http://www.hard-core-dx.com/nordicdx/antenna/wire/index.html
http://www.rlocman.com.ru/am/a03001.htm
http://www.rlocman.com.ru/am/a03002.htm
http://www.web-ee.com/Electronic-Projects/projects/test_pat/index.shtml
Designed by Paul Stenning.
http://www.electronic-projects.net/Electronic-Projects/projects/test_pat/index.shtml
http://www.web-ee.com/Electronic-Projects/projects/testplug/index.shtml
http://www.web-ee.com/Electronic-Projects/projects/testcard/index.shtml
Designed by Paul Stenning.
http://www.electronic-projects.net/Electronic-Projects/projects/testcard/index.shtml