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

B.)Backfill with 3 mm (Torr) of air.

C.)Switch on bombarder and increase to 250mA. Hold at this setting while maintaining pressure between 3 and 4 mm (Torr) with main valve.

D.)When the unit is at 150C/310F, increase current to 350mA.

E.)Maintain pressure between 3 and 4 mm (Torr) with main valve.

F.)When the glass reaches 200C/392F, reduce pressure to 1.5 Torr and increase to 400mA.

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

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 tube.

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

C.)When the unit reaches 150C/310F, increase the current to 350mA making sure the pressure is controlled with the main valve.

D.)When the glass reaches 200C/392F, increase the current to 400mA.

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

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.