Appendix F. Ignitor Bulb

NOTE: This appendix applies to lamps manufactured before July 1, 2002.

Ignitor

The ignitor bulb is designed to provide positive instant ignition of the main bulb. As shown in Figure 58, the ignitor is a UV bulb with a probe which projects into the waveguide. The instant the magnetron is energized, the probe intercepts enough energy to ionize the ignitor bulb, creating a small amount of UV radiation which reliably causes ignition in the main bulb. When the main bulb is at full power, the energy level in the ignitor is reduced, prolonging the life of the bulb.

 

 

 

TEFLON

 

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TUBING

BULB-PREVIOUS

 

13 GA. ID

 

 

CONSTRUCTION

 

 

 

 

 

 

CHOKE

BULB

 

 

 

 

 

CASTING

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18 GA. ID

Figure 58. Ignitor Bulb

Installation, Operation, and Maintenance Manual # 509252 Rev R 149