Inexpensive vacuum pump & Simple vacuum pump
Posted: Wed Mar 07, 2007 5:54 pm
This inexpensive and simple pump may be useful to amateurs for electrical discharge experiments. Also on the site are examples of electrical discharges at various pressures.
http://www.tinkerhack.com/vac4.htm
Joe Sal
http://www.tinkerhack.com/vac4.htm
Joe Sal