08-14-2018, 09:39 PM
Vacuum pump was yard sale find, bell jar was explosion proof mercury vapor glass, vacuum plate was 3/8" thick, 11" round aluminum salvage. Installed three feet of 3/8" thread bolts for leveling. Put 1/4" NPT thread in center of plate 90 deg brass fitting to 1/4" poly tubing to pump with tee and vacuum release valve. Used cranberry sauce can to hold wax melted on stove with coil in the wax. Bees wax was from arts/craft store, 100% pure... No pix of coil, in radio and at customer, all equipment currently in storage.
Wax stays melted for a long time in vacuum...
GL
Chas
Shop at industrial salvage yards and factory building demolition for stuff like I found...
Wax stays melted for a long time in vacuum...
GL
Chas
Shop at industrial salvage yards and factory building demolition for stuff like I found...
Pliny the younger
“nihil novum nihil varium nihil quod non semel spectasse sufficiat”