Vao

[Scrounger]

In the datasheets for vacuum tubes we see the symbol Vao, which is the source voltage or B+ correct? Does the plate see this Vao initially when B+ is applied? Would this be like a peak voltage for a given tube? Is that why Vao is given in the datasheets? Am I making any sense? Thanks

 

[homeskillet]

It's the voltage at the anode with a cold cathode.

 

[tubetvr]

It's the voltage at the anode with a cold cathode.

Or when anode current is 0, i.e. the tube is cutoff, (source Philips Electron tubes data handbook)

 

[Scrounger]

It's the voltage at the anode with a cold cathode.

Which would be equal to B+ correct?

 

[TheGimp]

Yes.

 

[homeskillet]

Yup. There's no current drawn through the tube so there is no drop across any resistance to B+. B+ might be higher with no draw though depending on your circuit. This is about as knowledgeable as I get 🙂.