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Dropping resistor for 'P' tubes filament

To use the calculator you need to enter the voltage and to choose tubes being heated. The calculator will compute the value of dropping resistor needed in the ciruit.

Tube #1:  

Tube #2:  

Tube #3:  

Tube #4:  

Tube #5:  

Tube #6:  

Tube #7:  

Tube #8:  

Tube #9:  

Tube #10:  

U =



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[ekalk]© Sławek Wernikowski, 2012-2016. Set of useful interactive calculators for electronics constructors and hams.

All suggestions and comments are always welcome.

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[[1.2 2017-01-28]]