Windchill Risk and Reliability Desktop Help > Windchill Prediction > Part Parameters Required for Predictions > 299B Part Parameters > Entering 299B Miscellaneous Parts > Entering 299B Tubes
Entering 299B Tubes
When 299B is selected as the calculation model, selecting a part category of Miscellaneous and a subcategory of Tube causes parameters to appear in the Prediction Data pane.
The following table describes the part parameters required for tubes when 299B is the model and the selected part category/subcategory is Miscellaneous/Tube.
Parameter
Type
Description
Quality Level
Choice List [Parts Count also]
The appropriate quality screening level of the device. Accepted quality levels and values for tubes follow.
• A1 = 0.30
• A2 = 0.05
• B = 1.00
• C = 4.00
Tube Type
Choice List [Parts Count also]
The type of tube. Many different choices are available.
* 
If Projects created in releases prior to Relex 2008 are converted, several 299B tube types are renamed. For more information, see 299B Tube Type Conversions.
Power
Real [Watts]
The rated peak power of the device. This parameter is used in conjunction with Units to enter the peak power value.
Units
Choice List
The units for the Power value. Choices are:
• w
• Kw
• Mw
Radiate Hrs/Filament Hrs (%)
Real
Required only for the following tube types: Continuous Wave Klystron (CW) Tube; Continuous Wave Klystron (KF-115) Tube; CW Magnetron (Rated Power < 5kW); Magnetrons Pulsed Klystron, Coaxial Pulsed Magnetrons and Conventional Pulsed Magnetrons; and Traveling Wave Tube.
The utilization frequency ratio of the magnetron. The equation is:
Radiate Hours / Filament Hours * 100
Frequency (GHz)
Real [GHz]
Required only for the following tube types: Continuous Wave Klystron (CW) Tube; Continuous Wave Klystron (KF-115) Tube; CW Magnetron (Rated Power < 5kW); Magnetrons Pulsed Klystron, Coaxial Pulsed Magnetrons and Conventional Pulsed Magnetrons; and Traveling Wave Tube.
The operating frequency of the tube in gigahertz.
Frequency (MHz)
Real (MHz)
Required for Continuous Wave Klystrons only.
The operating frequency of the tube in megahertz.
Learning Factor
Choice List [Parts Count also]
Not required for the following tube types: Continuous Wave Klystron (CW) Tube; Continuous Wave Klystron (KF-115) Tube; CW Magnetron (Rated Power < 5kW); Magnetrons Pulsed Klystron, Coaxial Pulsed Magnetrons and Conventional Pulsed Magnetrons; and Traveling Wave Tube.
The production level for the device. Choices are:
• Stable
• No Quality Control
• New in Production
Entering 299B Miscellaneous Parts