A.)Open main valve and evacuate unit to 0 mm (Torr). Close main valve.

B.)Backfill with 2mm (Torr) of air.

C.)Switch on bombarder and increase to 250 mA. Hold at this setting while maintaining pressure between 2 and 3 mm (Torr) with main valve.

D.)When the unit is at 150C/310F, increase current to 300 mA.

E.)Maintain pressure between 2 and 3 mm (Torr) with main valve.

F.)At 200C/392F, reduce pressure to 1.5 Torr and increase to 350/375 mA.

G.)When the electrodes are completely red and the glass has reached 230C/450F, switch off the bombarder and open the main valve.

H.)With the main valve open, allow the tube to cool to around 50C/125F with a vacuum gauge reading less than 5 microns.

I.)Fill the unit with gas.

A.)Evacuate unit to the point where you can close main valve and strike an arc in the tubes.

B.)Increase current to 250 mA and evacuate a small amount with the main valve whenever the tube starts to dim.

C.)When the unit is at 150C/310F, increase the current to 300 mA. Continue to bombard at 300 mA making sure the pressure is controlled with the main valve.

D.)At 200C/392F, reduce pressure and increase to 350/375 mA.

E.)When the electrodes are completely red and the glass has reached 230C/450F, switch off the bombarder and open the main valve.

F.)With the main valve open, allow the tube to be cooled to around 50C/125F with a vacuum reading of less than 5 microns.

G.)Fill the unit with gas.