A.)Open main valve and evacuate units to less than 4mm (torr). Close valve.
B.)Switch on bombarder and increase to 360mA. Hold at this setting while maintaining pressure between 1 and 2 mm (torr) with main valve.
C.)When the units are at 300F/150C, increase current to 650mA.
D.)Maintain pressure between 2 and 3mm (torr) with main valve.
E.)When the electrodes are completely red and the glass has reached 450F/230C, open the main valve for a few seconds and then switch off the bombarder.
F.)With the main valve open, allow the tube to cool to around 100F/40C to 125F/50C with a vacuum gauge reading less than 5 microns.
G.)Fill the units with gas.