El Cheapo Vacuum Pumps

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Mddeming@xxxxxxx 

Hi All,

Anyone wanting an inexpensive first stage vacuum pump that can get 
down to 30-40 mmHg might want to consider this item from Harbor Freight Tools:
Item No. 92475
Central Pneumatic
Air Vacuum Pump with R134A Connector

Regular Price $16.99
Sale Price $11.99

Their on-line catalogue is at:
<http://www.harborfreightusa.com/usa/common/start.do>http://www.harborfreightusa.com/usa/common/start.do

Since Tesla described a number of his experiments with partial vacuum 
as being in the 50-150 mmHg range, this should put most experimenters 
in the ballpark.

Peace,

Matt D.

Disclaimer:
I have no financial or personal interest in Harbor Freight Tools, Its 
suppliers or any associated companies, and this is not a compensated 
endorsement.

MDD