01-01-2017, 10:32 AM
Take care when reading data sheets. Most give two sets of figures: one is the absolute maximum ratings for the device whereas the other will be typical figures in operation.
The Philips data sheet give the following figures for the triode when used as an oscillator, as in your set: HT 250V, anode resistor 33k, anode current 4.7mA - obviously, the actual figures will vary due to the individual designer's preferences, but should be about the same.
Also, as Lawrence said, your formula is the wrong way round. You've written it to show the current being divided by the voltage. It should be the other way round: 135/0.013 although, as previously pointed out, the calculation is meaningless in an operational context.
The Philips data sheet give the following figures for the triode when used as an oscillator, as in your set: HT 250V, anode resistor 33k, anode current 4.7mA - obviously, the actual figures will vary due to the individual designer's preferences, but should be about the same.
Also, as Lawrence said, your formula is the wrong way round. You've written it to show the current being divided by the voltage. It should be the other way round: 135/0.013 although, as previously pointed out, the calculation is meaningless in an operational context.
